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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2020	Aug. 05, 2020
Cover [Abstract]
Entity Registrant Name	KIRBY CORP
Entity Central Index Key	0000056047
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		60,038,000
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-7615
Entity Tax Identification Number	74-1884980
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	55 Waugh Drive, Suite 1000
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77007
City Area Code	713
Local Phone Number	435-1000
Title of 12(b) Security	Common Stock
Trading Symbol	KEX
Security Exchange Name	NYSE

CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 108,471	$ 24,737
Accounts receivable:
Trade - less allowance for doubtful accounts	348,453	379,174
Other	228,409	104,175
Inventories - net	335,958	351,401
Prepaid expenses and other current assets	57,023	58,092
Total current assets	1,078,314	917,579
Property and equipment	5,611,184	5,324,090
Accumulated depreciation	(1,635,159)	(1,546,980)
Property and equipment - net	3,976,025	3,777,110
Operating lease right-of-use assets	183,048	159,641
Goodwill	657,832	953,826
Other intangibles - net	73,556	210,682
Other assets	48,236	60,259
Total assets	6,017,011	6,079,097
Current liabilities:
Bank notes payable	7	16
Income taxes payable	694	665
Accounts payable	177,290	206,778
Accrued liabilities	230,296	236,350
Current portion of operating lease liabilities	33,761	27,324
Deferred revenues	36,648	42,982
Total current liabilities	478,696	514,115
Long-term debt, net - less current portion	1,642,832	1,369,751
Deferred income taxes	568,816	588,204
Operating lease liabilities - less current portion	171,629	139,457
Other long-term liabilities	103,054	95,978
Total long-term liabilities	2,486,331	2,193,390
Contingencies and commitments
Kirby stockholders' equity:
Common stock, $0.10 par value per share. Authorized 120,000,000 shares, issued 65,472,000 shares	6,547	6,547
Additional paid-in capital	838,874	835,899
Accumulated other comprehensive income - net	(41,117)	(37,799)
Retained earnings	2,543,700	2,865,939
Treasury stock - at cost, 5,434,000 shares at June 30, 2020 and 5,513,000 at December 31, 2019	(299,124)	(301,963)
Total Kirby stockholders' equity	3,048,880	3,368,623
Noncontrolling interests	3,104	2,969
Total equity	3,051,984	3,371,592
Total liabilities and equity	$ 6,017,011	$ 6,079,097

CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Kirby stockholders' equity:
Common stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	65,472,000	65,472,000
Treasury stock, shares (in shares)	5,434,000	5,513,000

CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 541,159	$ 771,042	$ 1,185,085	$ 1,515,663
Costs and expenses:
Costs of sales and operating expenses	373,539	563,495	827,107	1,100,150
Selling, general and administrative	65,612	69,150	137,692	141,946
Taxes, other than on income	13,065	10,579	24,471	20,577
Depreciation and amortization	54,502	55,093	110,288	110,316
Impairments and other charges	0	0	561,274	0
(Gain) loss on disposition of assets	189	(3,118)	(303)	(5,275)
Total costs and expenses	506,907	695,199	1,660,529	1,367,714
Operating income (loss)	34,252	75,843	(475,444)	147,949
Other income	2,290	2,381	5,013	1,813
Interest expense	(12,708)	(15,515)	(25,507)	(28,716)
Earnings (loss) before taxes on income	23,834	62,709	(495,938)	121,046
(Provision) benefit for taxes on income	1,429	(15,269)	174,238	(29,149)
Net earnings (loss)	25,263	47,440	(321,700)	91,897
Less: Net earnings attributable to noncontrolling interests	(261)	(153)	(539)	(314)
Net earnings (loss) attributable to Kirby	$ 25,002	$ 47,287	$ (322,239)	$ 91,583
Net earnings (loss) per share attributable to Kirby common stockholders:
Basic (in dollars per share)	$ 0.42	$ 0.79	$ (5.38)	$ 1.53
Diluted (in dollars per share)	$ 0.42	$ 0.79	$ (5.38)	$ 1.53
Marine Transportation [Member]
Revenues:
Total revenues	$ 380,987	$ 404,286	$ 784,244	$ 772,407
Distribution and Services [Member]
Revenues:
Total revenues	$ 160,172	$ 366,756	$ 400,841	$ 743,256

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings (loss)	$ 25,263	$ 47,440	$ (321,700)	$ 91,897
Other comprehensive income (loss), net of taxes:
Pension and postretirement benefits	(2,477)	6,057	(2,395)	6,468
Foreign currency translation adjustments	351	(53)	(923)	76
Total other comprehensive income (loss), net of taxes	(2,126)	6,004	(3,318)	6,544
Total comprehensive income (loss), net of taxes	23,137	53,444	(325,018)	98,441
Net earnings attributable to noncontrolling interests	(261)	(153)	(539)	(314)
Comprehensive income (loss) attributable to Kirby	$ 22,876	$ 53,291	$ (325,557)	$ 98,127

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

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+ Details

CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net earnings (loss)	$ (321,700)	$ 91,897
Adjustments to reconcile net earnings (loss) to net cash provided by operations:
Depreciation and amortization	110,288	110,316
Provision (benefit) for deferred income taxes	(18,588)	26,007
Impairments and other charges	561,274	0
Amortization of unearned share-based compensation	8,652	7,907
Amortization of major maintenance costs	14,473	10,431
Other	3,513	(5,241)
Decrease in cash flows resulting from changes in operating assets and liabilities, net	(115,768)	(53,120)
Net cash provided by operating activities	242,144	188,197
Cash flows from investing activities:
Capital expenditures	(92,830)	(127,268)
Acquisitions of businesses and marine equipment	(342,247)	(252,840)
Proceeds from disposition of assets	4,918	23,364
Net cash used in investing activities	(430,159)	(356,744)
Cash flows from financing activities:
Borrowings (payments) on bank credit facilities, net	424,991	(313,805)
Borrowings on long-term debt	0	500,000
Payments on long-term debt	(150,000)	0
Payments of debt issue costs	0	(2,397)
Proceeds from exercise of stock options	353	1,903
Payments related to tax withholding for share-based compensation	(3,191)	(2,023)
Other	(404)	(410)
Net cash provided by financing activities	271,749	183,268
Increase in cash and cash equivalents	83,734	14,721
Cash and cash equivalents, beginning of year	24,737	7,800
Cash and cash equivalents, end of period	108,471	22,521
Cash paid (received) during the period:
Interest paid	26,265	29,271
Income taxes paid (refunded)	(37,704)	2,392
Operating cash outflow from operating leases	21,323	19,786
Non-cash investing activity:
Capital expenditures included in accounts payable	4,936	5,377
Right-of-use assets obtained in exchange for lease obligations	$ 38,754	$ 2,537

CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive, Net Income [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]	Total
Beginning balance at Dec. 31, 2018	$ 6,547	$ 823,347	$ (33,511)	$ 2,723,592	$ (306,788)	$ 3,114	$ 3,216,301
Beginning balance (in shares) at Dec. 31, 2018	65,472				(5,608)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	$ 0	118	0	0	$ 1,838	0	1,956
Stock option exercises (in shares)	0				34
Issuance of stock for equity awards, net of forfeitures	$ 0	(1,912)	0	0	$ 1,912	0	0
Issuance of stock for equity awards, net of forfeitures (in shares)	0				34
Tax withholdings on equity award vesting	$ 0	0	0	0	$ (2,023)	0	(2,023)
Tax withholdings on equity award vesting (in shares)	0				(30)
Amortization of unearned share-based compensation	$ 0	7,907	0	0	$ 0	0	7,907
Total comprehensive income (loss), net of taxes	0	0	6,544	91,583	0	314	98,441
Return of investment to noncontrolling interests	0	0	0	0	0	(410)	(410)
Ending balance at Jun. 30, 2019	$ 6,547	829,460	(26,967)	2,815,175	$ (305,061)	3,018	3,322,172
Ending balance (in shares) at Jun. 30, 2019	65,472				(5,570)
Beginning balance at Mar. 31, 2019	$ 6,547	827,497	(32,971)	2,767,888	$ (306,625)	3,072	3,265,408
Beginning balance (in shares) at Mar. 31, 2019	65,472				(5,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	$ 0	66	0	0	$ 474	0	540
Stock option exercises (in shares)	0				9
Issuance of stock for equity awards, net of forfeitures	$ 0	(1,110)	0	0	$ 1,110	0	0
Issuance of stock for equity awards, net of forfeitures (in shares)	0				20
Tax withholdings on equity award vesting	$ 0	0	0	0	$ (20)	0	(20)
Tax withholdings on equity award vesting (in shares)	0				0
Amortization of unearned share-based compensation	$ 0	3,007	0	0	$ 0	0	3,007
Total comprehensive income (loss), net of taxes	0	0	6,004	47,287	0	153	53,444
Return of investment to noncontrolling interests	0	0	0	0	0	(207)	(207)
Ending balance at Jun. 30, 2019	$ 6,547	829,460	(26,967)	2,815,175	$ (305,061)	3,018	3,322,172
Ending balance (in shares) at Jun. 30, 2019	65,472				(5,570)
Beginning balance at Dec. 31, 2019	$ 6,547	835,899	(37,799)	2,865,939	$ (301,963)	2,969	3,371,592
Beginning balance (in shares) at Dec. 31, 2019	65,472				(5,513)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	$ 0	26	0	0	$ 327	0	353
Stock option exercises (in shares)	0				15
Issuance of stock for equity awards, net of forfeitures	$ 0	(5,703)	0	0	$ 5,703	0	0
Issuance of stock for equity awards, net of forfeitures (in shares)	0				103
Tax withholdings on equity award vesting	$ 0	0	0	0	$ (3,191)	0	(3,191)
Tax withholdings on equity award vesting (in shares)	0				(39)
Amortization of unearned share-based compensation	$ 0	8,652	0	0	$ 0	0	8,652
Total comprehensive income (loss), net of taxes	0	0	(3,318)	(322,239)	0	539	(325,018)
Return of investment to noncontrolling interests	0	0	0	0	0	(404)	(404)
Ending balance at Jun. 30, 2020	$ 6,547	838,874	(41,117)	2,543,700	$ (299,124)	3,104	3,051,984
Ending balance (in shares) at Jun. 30, 2020	65,472				(5,434)
Beginning balance at Mar. 31, 2020	$ 6,547	837,879	(38,991)	2,518,698	$ (301,424)	3,045	3,025,754
Beginning balance (in shares) at Mar. 31, 2020	65,472				(5,475)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for equity awards, net of forfeitures	$ 0	(2,326)	0	0	$ 2,326	0	0
Issuance of stock for equity awards, net of forfeitures (in shares)	0				42
Tax withholdings on equity award vesting	$ 0	0	0	0	$ (26)	0	(26)
Tax withholdings on equity award vesting (in shares)	0				(1)
Amortization of unearned share-based compensation	$ 0	3,321	0	0	$ 0	0	3,321
Total comprehensive income (loss), net of taxes	0	0	(2,126)	25,002	0	261	23,137
Return of investment to noncontrolling interests	0	0	0	0	0	(202)	(202)
Ending balance at Jun. 30, 2020	$ 6,547	$ 838,874	$ (41,117)	$ 2,543,700	$ (299,124)	$ 3,104	$ 3,051,984
Ending balance (in shares) at Jun. 30, 2020	65,472				(5,434)

Basis for Preparation of the Condensed Financial Statements

6 Months Ended

Jun. 30, 2020

Basis for Preparation of the Condensed Financial Statements [Abstract]

Basis for Preparation of the Condensed Financial Statements

(1)	Basis for Preparation of the Condensed Financial Statements

The condensed financial statements included herein have been prepared by Kirby Corporation and its consolidated subsidiaries (the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Although the Company believes that the disclosures are adequate to make the information presented not misleading, certain information and footnote disclosures, including significant accounting policies normally included in annual financial statements, have been condensed or omitted pursuant to such rules and regulations. It is suggested that these condensed financial statements be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. Certain reclassifications have been made to reflect the current presentation of financial information.

Accounting Standards Adoptions

6 Months Ended

Jun. 30, 2020

Accounting Standards Adoptions [Abstract]

Accounting Standards Adoptions

(2)	Accounting Standards Adoptions

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740, Income Taxes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating this guidance to determine the impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-14, “Compensation – Retirement Benefits - Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans” which amends the annual disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing certain requirements, providing clarification on existing requirements and adding new requirements including adding an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. The amendments in this update are required to be applied on a retrospective basis to all periods presented. The Company is currently evaluating this guidance to determine the impact on its disclosures.

In January 2017, the FASB issued ASU 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”) which simplifies the subsequent measurement of goodwill by eliminating Step 2 in the goodwill impairment test that required an entity to perform procedures to determine the fair value of its assets and liabilities at the testing date. An entity instead shall perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value, incorporating all tax impacts caused by the recognition of the impairment loss. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The Company adopted ASU 2017-04 on January 1, 2020 on a prospective basis. See Note 8, Impairments and Other Charges for further details.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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+ Details

Acquisitions

6 Months Ended

Jun. 30, 2020

Acquisitions [Abstract]

Acquisitions

(3)	Acquisitions

During the six months ended June 30, 2020, the Company purchased four newly constructed inland pressure barges for $26,625,000 in cash.

On April 1, 2020, the Company completed the acquisition of the inland tank barge fleet of Savage Inland Marine, LLC (“Savage”) for $278,999,000 in cash. Savage’s tank barge fleet consisted of 92 inland tank barges with approximately 2.5 million barrels of capacity and 45 inland towboats. The Savage assets that were acquired primarily move petrochemicals, refined products, and crude oil on the Mississippi River, its tributaries, and the Gulf Intracoastal Waterway. The Company also acquired Savage’s ship bunkering business and barge fleeting business along the Gulf Coast. The Company considers Savage to be a natural extension of the current marine transportation segment, expanding the capabilities of the Company's inland based marine transportation business and lowers the average age of its fleet.

On January 3, 2020, the Company completed the acquisition of substantially all the assets of Convoy Servicing Company and Agility Fleet Services, LLC (collectively “Convoy”) for $37,180,000 in cash. Convoy is an authorized dealer for Thermo King refrigeration systems for trucks, railroad cars and other land transportation markets for North and East Texas and Colorado.

The fair values of the assets acquired and liabilities assumed from the Savage and Convoy acquisitions recorded at the respective acquisition dates were as follows (in thousands):

	Savage		Convoy
Assets:
Accounts receivable	$	—	$	5,677
Inventories		—		11,771
Prepaid expenses		1,067		177
Property and equipment		210,065		415
Operating lease right-of-use assets		27,755		3,713
Goodwill		81,667		10,309
Other intangibles		2,200		17,170
Total assets	$	322,754	$	49,232
Liabilities:
Accounts payable and accrued liabilities	$	—	$	8,339
Operating lease liabilities, including current portion		43,755		3,713
Total liabilities	$	43,755	$	12,052
Net assets acquired	$	278,999	$	37,180

The Company acquired customer relationships with an estimated value of $2,200,000 from Savage with an amortization period of 10 years. The fair values of the Savage acquisition have not been finalized and are provisional, pending completion of the tangible and intangible valuation studies. As additional information becomes known concerning the assets acquired, the Company may make adjustments to the fair value of assets acquired and liabilities assumed for up to one year following the acquisition date. Acquisition related costs of $281,000, consisting primarily of legal and other professional fees, were expensed as incurred to selling, general and administrative expense in the 2020 second quarter. All goodwill recorded for the Savage acquisition will be deductible for tax purposes.

The Company acquired intangible assets from Convoy with a weighted average amortization period of 11 years, consisting of $9,000,000 for customer relationships with an amortization period of 10 years, $8,000,000 for distributorships with an amortization period of 12 years and $170,000 for non-compete agreements with an amortization period of three years. All goodwill recorded for the Convoy acquisition will be deductible for tax purposes.

Pro forma results of the acquisitions made in the 2020 first six months have not been presented as the pro forma revenues and net earnings attributable to Kirby would not be materially different from the Company’s actual results.

Revenues

6 Months Ended

Jun. 30, 2020

Revenues [Abstract]

Revenues

(4)

Revenues

The following table sets forth the Company’s revenues by major source (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2020		2019		2020		2019
Marine transportation segment:
Inland transportation	$	303,012	$	310,162	$	621,577	$	593,247
Coastal transportation		77,975		94,124		162,667		179,160
	$	380,987	$	404,286	$	784,244	$	772,407
Distribution and services segment:
Oil and gas	$	30,624	$	198,864	$	109,302	$	421,965
Commercial and industrial		129,548		167,892		291,539		321,291
	$	160,172	$	366,756	$	400,841	$	743,256

Contract Assets and Liabilities. Contract liabilities represent advance consideration received from customers, and are recognized as revenue over time as the related performance obligation is satisfied. Revenues recognized in the 2020 and 2019 first six months that were included in the opening contract liability balances were $33,693,000 and $73,370,000, respectively. The Company presents all contract liabilities within the deferred revenues financial statement caption on the balance sheets. The Company did not have any contract assets at June 30, 2020 or December 31, 2019.

The Company applies the practical expedient that allows non-disclosure of information about remaining performance obligations that have original expected durations of one year or less.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Segment Data

6 Months Ended

Jun. 30, 2020

Segment Data [Abstract]

Segment Data

(5)	Segment Data

The Company’s operations are aggregated into two reportable business segments as follows:

Marine Transportation — Provides marine transportation principally by United States flag vessels of liquid cargoes throughout the United States inland waterway system, along all three United States coasts, in Alaska and Hawaii and, to a lesser extent, in United States coastal transportation of dry-bulk cargoes. The principal products transported include petrochemicals, black oil, refined petroleum products and agricultural chemicals.

Distribution and Services — Provides after-market services and parts for engines, transmissions, reduction gears and related equipment used in oilfield service, marine, power generation, on-highway, and other industrial applications. The Company also rents equipment including generators, industrial compressors, railcar movers, and high capacity lift trucks for use in a variety of industrial markets, and manufactures and remanufactures oilfield service equipment, including pressure pumping units, for land-based oilfield service customers.

The Company’s two reportable business segments are managed separately based on fundamental differences in their operations. The Company evaluates the performance of its segments based on the contributions to operating income of the respective segments, before income taxes, interest, gains or losses on disposition of assets, other nonoperating income, noncontrolling interests, accounting changes, and nonrecurring items. Intersegment revenues, based on market-based pricing, of the distribution and services segment from the marine transportation segment of $6,061,000 and $16,347,000 for the three months and six months ended June 30, 2020, respectively, and $7,446,000 and $14,981,000 for the three months and six months ended June 30, 2019, respectively, have been eliminated from the tables below. The related intersegment profit of $606,000 and $1,635,000 for the three months and six months ending June 30, 2020, respectively, and $744,000 and $1,498,000 for the three months and six months ended June 30, 2019, respectively, have also been eliminated from the tables below.

The following tables set forth the Company’s revenues and profit or loss by reportable segment and total assets (in thousands):

	Three months ended June 30,						Six months ended June 30
	2020			2019			2020			2019
Revenues:
Marine transportation	$	380,987		$	404,286		$	784,244		$	772,407
Distribution and services		160,172			366,756			400,841			743,256
	$	541,159		$	771,042		$	1,185,085		$	1,515,663
Segment profit (loss):
Marine transportation	$	51,375		$	53,243		$	102,091		$	88,667
Distribution and services		(14,147	)		23,128			(10,429	)		60,737
Other		(13,394	)		(13,662	)		(587,600	)		(28,358	)
	$	23,834		$	62,709		$	(495,938	)	$	121,046

	June 30, 2020		December 31, 2019
Total assets:
Marine transportation	$	4,843,477	$	4,536,368
Distribution and services		846,986		1,422,394
Other		326,548		120,335
	$	6,017,011	$	6,079,097

The following table presents the details of “Other” segment loss (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
General corporate expenses	$	(2,787	)	$	(3,646	)	$	(6,135	)	$	(6,730	)
Gain (loss) on disposition of assets		(189	)		3,118			303			5,275
Impairments and other charges		—			—			(561,274	)		—
Interest expense		(12,708	)		(15,515	)		(25,507	)		(28,716	)
Other income		2,290			2,381			5,013			1,813
	$	(13,394	)	$	(13,662	)	$	(587,600	)	$	(28,358	)

The following table presents the details of “Other” total assets (in thousands):

	June 30, 2020		December 31, 2019
General corporate assets	$	324,293	$	118,310
Investment in affiliates		2,255		2,025
	$	326,548	$	120,335

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Long-Term Debt

6 Months Ended

Jun. 30, 2020

Long-Term Debt [Abstract]

Long-Term Debt

(6)	Long-Term Debt

The Company has an amended and restated credit agreement (the “Credit Agreement”) with a group of commercial banks, with JPMorgan Chase Bank, N.A. as the administrative agent bank, allowing for an $850,000,000 unsecured revolving credit facility (“Revolving Credit Facility”) and an unsecured term loan (“Term Loan”) with a maturity date of March 27, 2024. The Term Loan is repayable in quarterly installments currently scheduled to commence September 30, 2023, with $343,750,000 due on March 27, 2024. The Term Loan is prepayable, in whole or in part, without penalty. As of June 30, 2020, the Company had outstanding borrowings of $425,000,000 and availability of $419,637,000 under the Revolving Credit Facility and borrowings of $375,000,000 under the Term Loan. The interest rates under the Revolving Credit Facility and Term Loan were each 1.6% at June 30, 2020.

On February 27, 2020, upon maturity, the Company repaid in full $150,000,000 of 2.72% unsecured senior notes.

The following table presents the carrying value and fair value of debt outstanding (in thousands):

	June 30, 2020					December 31, 2019
	Carrying Value			Fair Value		Carrying Value			Fair Value
Revolving Credit Facility	$	425,000		$	425,000	$	—		$	—
Term Loan		375,000			375,000		375,000			375,000
2.72% senior notes due February 27, 2020		—			—		150,000			151,547
3.29% senior notes due February 27, 2023		350,000			366,605		350,000			353,216
4.2% senior notes due March 1, 2028		500,000			591,992		500,000			541,546
Bank notes payable		7			7		16			16
Unamortized debt discounts and issuance costs		(7,168	)		—		(5,249	)		—
	$	1,642,839		$	1,758,604	$	1,369,767		$	1,421,325

The fair value of debt outstanding was determined using inputs characteristic of a Level 2 fair value measurement.

The following table presents borrowings and payments under the bank credit facilities (in thousands):

	Six months ended June 30,
	2020			2019
Borrowings on bank credit facilities	$	582,038		$	1,276,716
Payments on bank credit facilities		(157,047	)		(1,590,521	)
	$	424,991		$	(313,805	)

Leases

6 Months Ended

Jun. 30, 2020

Leases [Abstract]

Leases

(7)

Leases

The Company currently leases various facilities and equipment under cancelable and noncancelable operating leases. The accounting for the Company’s leases may require judgments, which include determining whether a contract contains a lease, allocating the consideration between lease and non-lease components, and determining the incremental borrowing rates. Leases with an initial noncancelable term of 12 months or less are not recorded on the balance sheet and related lease expense is recognized on a straight-line basis over the lease term. The Company has also elected to combine lease and non-lease components on all classes of leased assets, except for leased towing vessels for which the Company estimates approximately 75% of the costs relate to service costs and other non-lease components. Variable lease costs relate primarily to real estate executory costs (i.e. taxes, insurance and maintenance).

Future minimum lease payments under operating leases that have initial noncancelable lease terms in excess of one year were as follows (in thousands):

	June 30, 2020			December 31, 2019
2020	$	21,699		$	33,374
2021		37,597			25,911
2022		32,286			23,098
2023		26,779			19,162
2024		22,617			15,330
Thereafter		115,806			92,991
Total lease payments		256,784			209,866
Less: imputed interest		(51,394	)		(43,085	)
Operating lease liabilities	$	205,390		$	166,781

The following table sets forth lease costs (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Operating lease cost	$	11,873		$	9,893		$	20,914		$	19,971
Variable lease cost		444			515			596			1,031
Short-term lease cost		5,076			8,963			13,353			16,855
Sublease income		(130	)		(318	)		(374	)		(558	)
	$	17,263		$	19,053		$	34,489		$	37,299

The following table summarizes other supplemental information about the Company’s operating leases:

	June 30, 2020			December 31, 2019
Weighted average discount rate		4.1	%		4.0	%
Weighted average remaining lease term	10 years			11 years

Impairments and Other Charges

6 Months Ended

Jun. 30, 2020

Impairments and Other Charges [Abstract]

Impairments and Other Charges

(8)	Impairments and Other Charges

During the 2020 first quarter, Kirby’s market capitalization declined significantly compared to the 2019 fourth quarter. Over the same period, the overall United States stock market also declined significantly amid market volatility. In addition, as a result of uncertainty surrounding the outbreak of COVID-19 and a sharp decline in oil prices during the 2020 first quarter, many of the Company’s oil and gas customers responded by quickly cutting 2020 capital spending budgets and activity levels quickly declined. Lower activity levels have resulted in a decline in drilling activity, resulting in lower demand for new and remanufactured oilfield equipment and related parts and service in the distribution and services segment. As a result, the Company concluded that a triggering event had occurred and performed interim quantitative impairment tests as of March 31, 2020 for certain of the distribution and services segment’s long-lived assets and goodwill.

The Company determined the estimated fair value of such long-lived assets and reporting units using a discounted cash flow analysis and a market approach for comparable companies. This analysis included management’s judgment regarding short-term and long-term internal forecasts, updated for recent events, appropriate discount rates, and capital expenditures using inputs characteristic of a Level 3 fair value measurement.

In performing the impairment test of long-lived assets within the distribution and services segment, the Company determined that the carrying value of certain long-lived assets, including property and equipment as well as intangible assets associated with customer relationships, tradenames, and distributorships, were no longer recoverable, resulting in an impairment charge of $165,304,000 to reduce such long-lived assets to fair value during the three months ended March 31, 2020.

Based upon the results of the goodwill impairment test, the Company concluded that the carrying value of one reporting unit in the distribution and services segment exceeded its estimated fair value. For the three months ended March 31, 2020, the goodwill impairment charge of $387,970,000 was calculated as the amount that the carrying value of the reporting unit, including goodwill, and after recording impairments of long-lived assets identified above, exceeded its estimated fair value, incorporating all tax impacts caused by the recognition of the impairment loss.

In addition, the Company determined cost exceeded net realizable value for certain oilfield and pressure pumping related inventory, resulting in an $8,000,000 non-cash write-down during the three months ended March 31, 2020.

The following table summarizes the changes in goodwill (in thousands):

	Marine Transportation			Distribution and Services			Total
Balance at December 31, 2019 (gross)	$	424,149		$	549,846		$	973,995
Accumulated impairment and amortization		(18,574	)		(1,595	)		(20,169	)
Balance at December 31, 2019		405,575			548,251			953,826
Impairment		—			(387,970	)		(387,970	)
Savage acquisition		81,667			—			81,667
Convoy acquisition		—			10,309			10,309
Balance at June 30, 2020 (gross)		505,816			560,155			1,065,971
Accumulated impairment and amortization		(18,574	)		(389,565	)		(408,139	)
Balance at June 30, 2020	$	487,242		$	170,590		$	657,832

Stock Award Plans

6 Months Ended

Jun. 30, 2020

Stock Award Plans [Abstract]

Stock Award Plans

(9)	Stock Award Plans

During the six months ended June 30, 2020, the Company granted 153,460 restricted stock units (“RSUs”) and 114,600 stock options to selected officers and other key employees under its employee stock award plan. The RSUs vest ratably over five years and the stock options become exercisable ratably over three years and expire after seven years.

During the six months ended June 30, 2020, the Company granted 39,913 shares of restricted stock to nonemployee directors of the Company under the director stock award plan. The restricted stock vests six months after the date of grant except that restricted stock granted in lieu of cash director fees vests in equal quarterly increments through March 31, 2021.

The compensation cost that has been charged against earnings for the Company’s stock award plans and the income tax benefit recognized in the statement of earnings for stock awards were as follows (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2020		2019		2020		2019
Compensation cost	$	3,321	$	3,007	$	8,652	$	7,907
Income tax benefit	$	889	$	740	$	2,151	$	1,909

Taxes on Income

6 Months Ended

Jun. 30, 2020

Taxes on Income [Abstract]

Taxes on Income

(10)	Taxes on Income

On March 27, 2020, the United States Congress passed and the President signed the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) into law to address the COVID-19 pandemic. One provision of the CARES Act allows net operating losses generated in 2018 through 2020 to be carried back up to five years. Pursuant to this provision of the CARES Act, the Company recorded a federal current benefit for taxes on income for the six months ended June 30, 2020 due to carrying back net operating losses generated between 2018 and 2020 used to offset taxable income generated between 2013 and 2017. This caused a reduction in the effective tax rate during the six months ended June 30, 2020 as net operating losses carried back to tax years 2013 through 2017 are applied at a federal tax rate of 35% applicable to those tax years, compared to a 21% tax rate effective at June 30, 2020. Net operating losses generated in 2018 and 2019 were used to offset taxable income generated between 2013 and 2017 taxed at 35% resulting in a tax benefit of $50,824,000. As a result, during the six months ended June 30, 2020, the Company’s deferred tax asset related to federal net operating losses decreased by $77,262,000. During the six months ended June 30, 2020, the Company received a tax refund of $30,606,000 for its 2018 tax return related to net operating losses being carried back to offset taxable income generated during 2013. At June 30, 2020 the Company had a federal income tax receivable of $125,883,000 included in Accounts Receivable – Other on the balance sheet.

Earnings (loss) before taxes on income and details of the provision (benefit) for taxes on income were as follows (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Earnings (loss) before taxes on income:
United States	$	23,861		$	62,903		$	(495,628	)	$	121,655
Foreign		(27	)		(194	)		(310	)		(609	)
	$	23,834		$	62,709		$	(495,938	)	$	121,046
Provision (benefit) for taxes on income:
Federal:
Current	$	(18,608	)	$	—		$	(156,304	)	$	—
Deferred		16,149			13,517			(7,294	)		26,007
State and local:
Current		536			1,686			618			3,145
Deferred		505			—			(11,294	)		—
Foreign - current		(11	)		66			36			(3	)
	$	(1,429	)	$	15,269		$	(174,238	)	$	29,149

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Earnings Per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

(11)	Earnings Per Share

The following table presents the components of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Net earnings (loss) attributable to Kirby	$	25,002		$	47,287		$	(322,239	)	$	91,583
Undistributed earnings allocated to restricted shares		(46	)		(122	)		—			(241	)
Income (loss) available to Kirby common stockholders – basic		24,956			47,165			(322,239	)		91,342
Undistributed earnings allocated to restricted shares		46			122			—			241
Undistributed earnings reallocated to restricted shares		(46	)		(122	)		—			(240	)
Income (loss) available to Kirby common stockholders – diluted	$	24,956		$	47,165		$	(322,239	)	$	91,343

Shares outstanding:
Weighted average common stock issued and outstanding		60,023			59,894			60,003			59,882
Weighted average unvested restricted stock		(111	)		(154	)		(105	)		(157	)
Weighted average common stock outstanding – basic		59,912			59,740			59,898			59,725
Dilutive effect of stock options and restricted stock units		25			167			—			140
Weighted average common stock outstanding – diluted		59,937			59,907			59,898			59,865

Net earnings (loss) per share attributable to Kirby common stockholders:
Basic	$	0.42		$	0.79		$	(5.38	)	$	1.53
Diluted	$	0.42		$	0.79		$	(5.38	)	$	1.53

Certain outstanding options to purchase approximately 681,000 and 297,000 shares of common stock were excluded in the computation of diluted earnings per share as of June 30, 2020 and 2019, respectively, as such stock options would have been antidilutive. Certain outstanding RSUs to convert to 162,000 and 4,000 shares of common stock were also excluded in the computation of diluted earnings per share as of June 30, 2020 and 2019, respectively, as such RSUs would have been antidilutive.

Inventories

6 Months Ended

Jun. 30, 2020

Inventories [Abstract]

Inventories

(12)	Inventories

The following table presents the details of inventories – net (in thousands):

	June 30, 2020		December 31, 2019
Finished goods	$	280,948	$	291,214
Work in process		55,010		60,187
	$	335,958	$	351,401

Retirement Plans

6 Months Ended

Jun. 30, 2020

Retirement Plans [Abstract]

Retirement Plans

(13)	Retirement Plans

The Company sponsors a defined benefit plan for certain of its inland vessel personnel and shore based tankermen. The plan benefits are based on an employee’s years of service and compensation. The plan assets consist primarily of equity and fixed income securities.

On April 12, 2017, the Company amended its pension plan to cease all benefit accruals for periods after May 31, 2017 for certain participants. Participants grandfathered and not impacted were those, as of the close of business on May 31, 2017, who either (a) had completed 15 years of pension service or (b) had attained age 50 and completed 10 years of pension service. Participants non-grandfathered are eligible to receive discretionary 401(k) plan contributions.

The Company’s pension plan funding strategy is to make annual contributions in amounts equal to or greater than amounts necessary to meet minimum government funding requirements. The plan’s benefit obligations are based on a variety of demographic and economic assumptions, and the pension plan assets’ returns are subject to various risks, including market and interest rate risk, making an accurate prediction of the pension plan contribution difficult. Based on current pension plan assets and market conditions, the Company does not expect to make a contribution to the Kirby pension plan during 2020.

On February 14, 2018, with the acquisition of Higman Marine, Inc. and its affiliated companies (“Higman”), the Company assumed Higman’s pension plan for its inland vessel personnel and office staff. On March 27, 2018, the Company amended the Higman pension plan to close it to all new entrants and cease all benefit accruals for periods after May 15, 2018 for all participants. The Company made contributions of $483,000 and $479,000 to the Higman pension plan in the 2020 first six months for the 2019 and 2020 plan years, respectively. In addition, the Company made a contribution of $479,000 to the Higman pension plan during July 2020 for the 2020 plan year. The Company expects to make an additional contribution of $314,000 to the Higman pension plan during 2020 for the 2019 plan year and contributions of $479,000 for the 2020 plan year.

The Company sponsors an unfunded defined benefit health care plan that provides limited postretirement medical benefits to employees who meet minimum age and service requirements, and to eligible dependents. The plan limits cost increases in the Company’s contribution to 4% per year. The plan is contributory, with retiree contributions adjusted annually. The plan eliminated coverage for future retirees as of December 31, 2011. The Company also has an unfunded defined benefit supplemental executive retirement plan (“SERP”) that was assumed in an acquisition in 1999. That plan ceased to accrue additional benefits effective January 1, 2000.

The components of net periodic benefit cost for the Company’s defined benefit plans were as follows (in thousands):

	Pension Benefits
	Pension Plan						SERP
	Three months ended June 30,						Three months ended June 30,
	2020			2019			2020		2019
Components of net periodic benefit cost:
Service cost	$	1,919		$	1,914		$	—	$	—
Interest cost		3,949			4,040			10		13
Expected return on plan assets		(5,735	)		(5,254	)		—		—
Amortization of actuarial loss		425			41			9		7
Net periodic benefit cost	$	558		$	741		$	19	$	20

	Pension Benefits
	Pension Plan						SERP
	Six months ended June 30,						Six months ended June 30,
	2020			2019			2020		2019
Components of net periodic benefit cost:
Service cost	$	3,836		$	3,682		$	—	$	—
Interest cost		7,839			8,247			20		26
Expected return on plan assets		(11,923	)		(10,478	)		—		—
Amortization of actuarial loss		657			719			18		14
Net periodic benefit cost	$	409		$	2,170		$	38	$	40

The components of net periodic benefit cost for the Company’s postretirement benefit plan were as follows (in thousands):

	Other Postretirement Benefits
	Postretirement Welfare Plan
	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Components of net periodic benefit cost:
Service cost	$	—		$	—		$	—		$	—
Interest cost		5			8			11			16
Amortization of actuarial gain		(130	)		(135	)		(261	)		(270	)
Net periodic benefit cost	$	(125	)	$	(127	)	$	(250	)	$	(254	)

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 55
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Other Comprehensive Income

6 Months Ended

Jun. 30, 2020

Other Comprehensive Income [Abstract]

Other Comprehensive Income

(14)	Other Comprehensive Income

The Company’s changes in other comprehensive income were as follows (in thousands):

	Three months ended June 30,
	2020									2019
	Gross Amount			Income Tax (Provision) Benefit			Net Amount			Gross Amount			Income Tax (Provision) Benefit			Net Amount
Pension and postretirement benefits (a):
Amortization of net actuarial loss	$	304		$	(77	)	$	227		$	(87	)	$	21		$	(66	)
Actuarial gains (losses)		(3,609	)		905			(2,704	)		8,167			(2,044	)		6,123
Foreign currency translation		351			—			351			(53	)		—			(53	)
Total	$	(2,954	)	$	828		$	(2,126	)	$	8,027		$	(2,023	)	$	6,004

	Six months ended June 30,
	2020									2019
	Gross Amount			Income Tax (Provision) Benefit			Net Amount			Gross Amount		Income Tax Provision			Net Amount
Pension and postretirement benefits (a):
Amortization of net actuarial loss	$	414		$	(105	)	$	309		$	463	$	(118	)	$	345
Actuarial gains (losses)		(3,609	)		905			(2,704	)		8,167		(2,044	)		6,123
Foreign currency translation		(923	)		—			(923	)		76		—			76
Total	$	(4,118	)	$	800		$	(3,318	)	$	8,706	$	(2,162	)	$	6,544

(a)

Actuarial gains (losses) are amortized into other income. (See Note 13, Retirement Plans)

Contingencies

6 Months Ended

Jun. 30, 2020

Contingencies [Abstract]

Contingencies

(15)	Contingencies

On May 10, 2019, two tank barges and a towboat, the M/V Voyager, owned and operated by Kirby Inland Marine, LP (“Kirby Inland Marine”), a wholly owned subsidiary of the Company, were struck by the LPG tanker, the Genesis River, in the Houston Ship Channel. The bow of the Genesis River penetrated the Kirby 30015T and capsized the MMI 3014. The collision penetrated the hull of the Kirby 30015T causing its cargo, reformate, to be discharged into the water. The United States Coast Guard (“USCG”) and the National Transportation Safety Board (“NTSB”) designated the owner and pilot of the Genesis River as well as the subsidiary of the Company as parties of interest in their investigation into the cause of the incident. On June 19, 2019, the Company filed a limitation action in the U.S. District Court of the Southern District of Texas - Galveston Division seeking limitation of liability and asserting that the Genesis River and her owner/manager are at fault for damages including removal costs and claims under the Oil Pollution Act of 1990 and maritime law. Multiple claimants have filed claims in the limitation seeking damages under the Oil Pollution Act of 1990. The Company has various insurance policies covering liabilities including pollution, marine and general liability and believes that it has satisfactory insurance coverage for the potential liabilities arising from the incident. The Company believes it has accrued adequate reserves for the incident and does not expect the incident to have a material adverse effect on its business or financial condition.

On October 13, 2016, the tug Nathan E. Stewart and barge DBL 55, an articulated tank barge and tugboat unit (“ATB”) owned and operated by Kirby Offshore Marine, LLC, a wholly owned subsidiary of the Company, ran aground at the entrance to Seaforth Channel on Atholone Island, British Columbia. The grounding resulted in a breach of a portion of the Nathan E. Stewart’s fuel tanks causing a discharge of diesel fuel into the water. The USCG and the NTSB designated the Company as a party of interest in their investigation as to the cause of the incident. The Canadian authorities including Transport Canada and the Canadian Transportation Safety Board investigated the cause of the incident. On October 10, 2018, the Heiltsuk First Nation filed a civil action in the British Columbia Supreme Court against a subsidiary of the Company, the master and pilot of the tug, the vessels and the Canadian government seeking unquantified damages as a result of the incident. On May 1, 2019, the Company filed a limitation action in the Federal Court of Canada seeking limitation of liability relating to the incident as provided under admiralty law. The Heiltsuk First Nation’s civil claim has been consolidated into the Federal Court limitation action as of July 26, 2019 and it is expected that the Federal Court of Canada will decide all claims against the Company. The Company is unable to estimate the potential exposure in the civil proceeding. The Company has various insurance policies covering liabilities including pollution, property, marine and general liability and believes that it has satisfactory insurance coverage for the cost of cleanup and salvage operations as well as other potential liabilities arising from the incident. The Company believes it has accrued adequate reserves for the incident and does not expect the incident to have a material adverse effect on its business or financial condition.

On March 22, 2014, two tank barges and a towboat, the M/V Miss Susan, owned by Kirby Inland Marine, were involved in a collision with the M/S Summer Wind on the Houston Ship Channel near Texas City, Texas. The lead tank barge was damaged in the collision resulting in a discharge of intermediate fuel oil from one of its cargo tanks. The Company is participating in the natural resource damage assessment and restoration process with federal and state government natural resource trustees. The Company believes it has adequate insurance coverage for pollution, marine and other potential liabilities arising from the incident. The Company believes it has accrued adequate reserves for the incident and does not expect the incident to have a material adverse effect on its business or financial condition.

In addition, the Company is involved in various legal and other proceedings which are incidental to the conduct of its business, none of which in the opinion of management will have a material effect on the Company’s financial condition, results of operations, or cash flows. Management believes that it has recorded adequate reserves and believes that it has adequate insurance coverage or has meritorious defenses for these other claims and contingencies.

The Company has issued guaranties or obtained standby letters of credit and performance bonds supporting performance by the Company and its subsidiaries of contractual or contingent legal obligations of the Company and its subsidiaries incurred in the ordinary course of business. The aggregate notional value of these instruments is $23,169,000 at June 30, 2020, including $11,345,000 in letters of credit and $11,824,000 in performance bonds. All of these instruments have an expiration date within two years. The Company does not believe demand for payment under these instruments is likely and expects no material cash outlays to occur regarding these instruments.

Accounting Standards Adoptions (Policies)	6 Months Ended
Accounting Standards Adoptions (Policies)	Jun. 30, 2020
Accounting Standards Adoptions [Abstract]
Accounting Standards Adoptions	In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740, Income Taxes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating this guidance to determine the impact on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-14, “Compensation – Retirement Benefits - Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans” which amends the annual disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing certain requirements, providing clarification on existing requirements and adding new requirements including adding an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. The amendments in this update are required to be applied on a retrospective basis to all periods presented. The Company is currently evaluating this guidance to determine the impact on its disclosures. In January 2017, the FASB issued ASU 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”) which simplifies the subsequent measurement of goodwill by eliminating Step 2 in the goodwill impairment test that required an entity to perform procedures to determine the fair value of its assets and liabilities at the testing date. An entity instead shall perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value, incorporating all tax impacts caused by the recognition of the impairment loss. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The Company adopted ASU 2017-04 on January 1, 2020 on a prospective basis. See Note 8, Impairments and Other Charges for further details.

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2020

Acquisitions [Abstract]

Fair Values of Assets Acquired and Liabilities Assumed

The fair values of the assets acquired and liabilities assumed from the Savage and Convoy acquisitions recorded at the respective acquisition dates were as follows (in thousands):

	Savage		Convoy
Assets:
Accounts receivable	$	—	$	5,677
Inventories		—		11,771
Prepaid expenses		1,067		177
Property and equipment		210,065		415
Operating lease right-of-use assets		27,755		3,713
Goodwill		81,667		10,309
Other intangibles		2,200		17,170
Total assets	$	322,754	$	49,232
Liabilities:
Accounts payable and accrued liabilities	$	—	$	8,339
Operating lease liabilities, including current portion		43,755		3,713
Total liabilities	$	43,755	$	12,052
Net assets acquired	$	278,999	$	37,180

Revenues (Tables)

6 Months Ended

Jun. 30, 2020

Revenues [Abstract]

Revenues by Major Source

The following table sets forth the Company’s revenues by major source (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2020		2019		2020		2019
Marine transportation segment:
Inland transportation	$	303,012	$	310,162	$	621,577	$	593,247
Coastal transportation		77,975		94,124		162,667		179,160
	$	380,987	$	404,286	$	784,244	$	772,407
Distribution and services segment:
Oil and gas	$	30,624	$	198,864	$	109,302	$	421,965
Commercial and industrial		129,548		167,892		291,539		321,291
	$	160,172	$	366,756	$	400,841	$	743,256

Segment Data (Tables)

6 Months Ended

Jun. 30, 2020

Segment Data [Abstract]

Segment Reporting Information, by Segment

The following tables set forth the Company’s revenues and profit or loss by reportable segment and total assets (in thousands):

	Three months ended June 30,						Six months ended June 30
	2020			2019			2020			2019
Revenues:
Marine transportation	$	380,987		$	404,286		$	784,244		$	772,407
Distribution and services		160,172			366,756			400,841			743,256
	$	541,159		$	771,042		$	1,185,085		$	1,515,663
Segment profit (loss):
Marine transportation	$	51,375		$	53,243		$	102,091		$	88,667
Distribution and services		(14,147	)		23,128			(10,429	)		60,737
Other		(13,394	)		(13,662	)		(587,600	)		(28,358	)
	$	23,834		$	62,709		$	(495,938	)	$	121,046

	June 30, 2020		December 31, 2019
Total assets:
Marine transportation	$	4,843,477	$	4,536,368
Distribution and services		846,986		1,422,394
Other		326,548		120,335
	$	6,017,011	$	6,079,097

Other Segment Reporting Information

The following table presents the details of “Other” segment loss (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
General corporate expenses	$	(2,787	)	$	(3,646	)	$	(6,135	)	$	(6,730	)
Gain (loss) on disposition of assets		(189	)		3,118			303			5,275
Impairments and other charges		—			—			(561,274	)		—
Interest expense		(12,708	)		(15,515	)		(25,507	)		(28,716	)
Other income		2,290			2,381			5,013			1,813
	$	(13,394	)	$	(13,662	)	$	(587,600	)	$	(28,358	)

The following table presents the details of “Other” total assets (in thousands):

	June 30, 2020		December 31, 2019
General corporate assets	$	324,293	$	118,310
Investment in affiliates		2,255		2,025
	$	326,548	$	120,335

Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2020

Long-Term Debt [Abstract]

Carrying Values and Fair Values of Debt Outstanding

The following table presents the carrying value and fair value of debt outstanding (in thousands):

	June 30, 2020					December 31, 2019
	Carrying Value			Fair Value		Carrying Value			Fair Value
Revolving Credit Facility	$	425,000		$	425,000	$	—		$	—
Term Loan		375,000			375,000		375,000			375,000
2.72% senior notes due February 27, 2020		—			—		150,000			151,547
3.29% senior notes due February 27, 2023		350,000			366,605		350,000			353,216
4.2% senior notes due March 1, 2028		500,000			591,992		500,000			541,546
Bank notes payable		7			7		16			16
Unamortized debt discounts and issuance costs		(7,168	)		—		(5,249	)		—
	$	1,642,839		$	1,758,604	$	1,369,767		$	1,421,325

Borrowings and Payments Under the Bank Credit Facilities

The following table presents borrowings and payments under the bank credit facilities (in thousands):

	Six months ended June 30,
	2020			2019
Borrowings on bank credit facilities	$	582,038		$	1,276,716
Payments on bank credit facilities		(157,047	)		(1,590,521	)
	$	424,991		$	(313,805	)

Leases (Tables)

6 Months Ended

Jun. 30, 2020

Leases [Abstract]

Future Minimum Lease Payments under Operating Leases

Future minimum lease payments under operating leases that have initial noncancelable lease terms in excess of one year were as follows (in thousands):

	June 30, 2020			December 31, 2019
2020	$	21,699		$	33,374
2021		37,597			25,911
2022		32,286			23,098
2023		26,779			19,162
2024		22,617			15,330
Thereafter		115,806			92,991
Total lease payments		256,784			209,866
Less: imputed interest		(51,394	)		(43,085	)
Operating lease liabilities	$	205,390		$	166,781

Lease Cost

The following table sets forth lease costs (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Operating lease cost	$	11,873		$	9,893		$	20,914		$	19,971
Variable lease cost		444			515			596			1,031
Short-term lease cost		5,076			8,963			13,353			16,855
Sublease income		(130	)		(318	)		(374	)		(558	)
	$	17,263		$	19,053		$	34,489		$	37,299

Operating Leases, Weighted Average Discount Rate and Remaining Lease Term

The following table summarizes other supplemental information about the Company’s operating leases:

	June 30, 2020			December 31, 2019
Weighted average discount rate		4.1	%		4.0	%
Weighted average remaining lease term	10 years			11 years

Impairments and Other Charges (Tables)

6 Months Ended

Jun. 30, 2020

Impairments and Other Charges [Abstract]

Changes in Goodwill

The following table summarizes the changes in goodwill (in thousands):

	Marine Transportation			Distribution and Services			Total
Balance at December 31, 2019 (gross)	$	424,149		$	549,846		$	973,995
Accumulated impairment and amortization		(18,574	)		(1,595	)		(20,169	)
Balance at December 31, 2019		405,575			548,251			953,826
Impairment		—			(387,970	)		(387,970	)
Savage acquisition		81,667			—			81,667
Convoy acquisition		—			10,309			10,309
Balance at June 30, 2020 (gross)		505,816			560,155			1,065,971
Accumulated impairment and amortization		(18,574	)		(389,565	)		(408,139	)
Balance at June 30, 2020	$	487,242		$	170,590		$	657,832

Stock Award Plans (Tables)

6 Months Ended

Jun. 30, 2020

Stock Award Plans [Abstract]

Compensation Cost Breakdown in Statement of Earnings

	Three months ended June 30,				Six months ended June 30,
	2020		2019		2020		2019
Compensation cost	$	3,321	$	3,007	$	8,652	$	7,907
Income tax benefit	$	889	$	740	$	2,151	$	1,909

Taxes on Income (Tables)

6 Months Ended

Jun. 30, 2020

Taxes on Income [Abstract]

Earnings Before Taxes

Earnings (loss) before taxes on income and details of the provision (benefit) for taxes on income were as follows (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Earnings (loss) before taxes on income:
United States	$	23,861		$	62,903		$	(495,628	)	$	121,655
Foreign		(27	)		(194	)		(310	)		(609	)
	$	23,834		$	62,709		$	(495,938	)	$	121,046
Provision (benefit) for taxes on income:
Federal:
Current	$	(18,608	)	$	—		$	(156,304	)	$	—
Deferred		16,149			13,517			(7,294	)		26,007
State and local:
Current		536			1,686			618			3,145
Deferred		505			—			(11,294	)		—
Foreign - current		(11	)		66			36			(3	)
	$	(1,429	)	$	15,269		$	(174,238	)	$	29,149

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Basic and Diluted Earnings per Share

The following table presents the components of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Three months ended June 30,						Six months ended June 30,
	2020			2019			2020			2019
Net earnings (loss) attributable to Kirby	$	25,002		$	47,287		$	(322,239	)	$	91,583
Undistributed earnings allocated to restricted shares		(46	)		(122	)		—			(241	)
Income (loss) available to Kirby common stockholders – basic		24,956			47,165			(322,239	)		91,342
Undistributed earnings allocated to restricted shares		46			122			—			241
Undistributed earnings reallocated to restricted shares		(46	)		(122	)		—			(240	)
Income (loss) available to Kirby common stockholders – diluted	$	24,956		$	47,165		$	(322,239	)	$	91,343

Shares outstanding:
Weighted average common stock issued and outstanding		60,023			59,894			60,003			59,882
Weighted average unvested restricted stock		(111	)		(154	)		(105	)		(157	)
Weighted average common stock outstanding – basic		59,912			59,740			59,898			59,725
Dilutive effect of stock options and restricted stock units		25			167			—			140
Weighted average common stock outstanding – diluted		59,937			59,907			59,898			59,865

Net earnings (loss) per share attributable to Kirby common stockholders:
Basic	$	0.42		$	0.79		$	(5.38	)	$	1.53
Diluted	$	0.42		$	0.79		$	(5.38	)	$	1.53

Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventories [Abstract]

Details of Inventories

The following table presents the details of inventories – net (in thousands):

	June 30, 2020		December 31, 2019
Finished goods	$	280,948	$	291,214
Work in process		55,010		60,187
	$	335,958	$	351,401

Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2020

Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net Periodic Benefit Cost

The components of net periodic benefit cost for the Company’s defined benefit plans were as follows (in thousands):

	Pension Benefits
	Pension Plan						SERP
	Three months ended June 30,						Three months ended June 30,
	2020			2019			2020		2019
Components of net periodic benefit cost:
Service cost	$	1,919		$	1,914		$	—	$	—
Interest cost		3,949			4,040			10		13
Expected return on plan assets		(5,735	)		(5,254	)		—		—
Amortization of actuarial loss		425			41			9		7
Net periodic benefit cost	$	558		$	741		$	19	$	20

	Pension Benefits
	Pension Plan						SERP
	Six months ended June 30,						Six months ended June 30,
	2020			2019			2020		2019
Components of net periodic benefit cost:
Service cost	$	3,836		$	3,682		$	—	$	—
Interest cost		7,839			8,247			20		26
Expected return on plan assets		(11,923	)		(10,478	)		—		—
Amortization of actuarial loss		657			719			18		14
Net periodic benefit cost	$	409		$	2,170		$	38	$	40

Acquisitions (Details) bbl in Millions			3 Months Ended	6 Months Ended
Acquisitions (Details) bbl in Millions	Mar. 31, 2020 USD ($) Towboat TankBarge bbl	Jan. 03, 2020 USD ($)	Jun. 30, 2020 USD ($) TankBarge	Jun. 30, 2020 USD ($) TankBarge	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Acquisitions [Abstract]
Purchase price				$ 92,830,000	$ 127,268,000
Cash paid for acquisition				81,667,000
Assets [Abstract]
Goodwill			$ 657,832,000	$ 657,832,000		$ 953,826,000
Liabilities [Abstract]
Acquisition related costs			$ 281,000
Inland Pressure Barges [Member]
Acquisitions [Abstract]
Number of maritime vessels acquired \| TankBarge			4	4
Purchase price				$ 26,625,000
Savage Inland Marine, LLC [Member]
Acquisitions [Abstract]
Cash paid for acquisition	$ 278,999,000
Assets [Abstract]
Accounts receivable	0
Inventories	0
Prepaid expenses	1,067,000
Property and equipment	210,065,000
Operating lease right-of-use assets	27,755,000
Goodwill	81,667,000
Other intangibles	2,200,000
Total assets	322,754,000
Liabilities [Abstract]
Accounts payable and accrued liabilities	0
Operating lease liabilities, including current portion	43,755,000
Total liabilities	43,755,000
Net assets acquired	278,999,000
Savage Inland Marine, LLC [Member] \| Customer Relationships [Member]
Assets [Abstract]
Other intangibles	$ 2,200,000
Liabilities [Abstract]
Intangible assets amortization period				10 years
Savage Inland Marine, LLC [Member] \| Inland Tank Barges [Member]
Acquisitions [Abstract]
Number of maritime vessels acquired \| TankBarge	92
Tank barge barrel capacity (in barrels) \| bbl	2.5
Savage Inland Marine, LLC [Member] \| Inland Towboats [Member]
Acquisitions [Abstract]
Number of maritime vessels acquired \| Towboat	45
Convoy [Member]
Acquisitions [Abstract]
Cash paid for acquisition		$ 37,180,000
Assets [Abstract]
Accounts receivable		5,677,000
Inventories		11,771,000
Prepaid expenses		177,000
Property and equipment		415,000
Operating lease right-of-use assets		3,713,000
Goodwill		10,309,000
Other intangibles		17,170,000
Total assets		49,232,000
Liabilities [Abstract]
Accounts payable and accrued liabilities		8,339,000
Operating lease liabilities, including current portion		3,713,000
Total liabilities		12,052,000
Net assets acquired		37,180,000
Weighted average amortization period of intangibles				11 years
Convoy [Member] \| Customer Relationships [Member]
Assets [Abstract]
Other intangibles		9,000,000
Liabilities [Abstract]
Intangible assets amortization period				10 years
Convoy [Member] \| Distributorships [Member]
Assets [Abstract]
Other intangibles		8,000,000
Liabilities [Abstract]
Intangible assets amortization period				12 years
Convoy [Member] \| Non-compete Agreements [Member]
Assets [Abstract]
Other intangibles		$ 170,000
Liabilities [Abstract]
Intangible assets amortization period				3 years

Revenues (Details) - USD ($)	3 Months Ended		6 Months Ended
Revenues (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 541,159,000	$ 771,042,000	$ 1,185,085,000	$ 1,515,663,000
Revenue recognized			33,693,000	73,370,000
Contract assets	0		0		$ 0
Marine Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	380,987,000	404,286,000	784,244,000	772,407,000
Marine Transportation [Member] \| Inland Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	303,012,000	310,162,000	621,577,000	593,247,000
Marine Transportation [Member] \| Coastal Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	77,975,000	94,124,000	162,667,000	179,160,000
Distribution and Services [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	160,172,000	366,756,000	400,841,000	743,256,000
Distribution and Services [Member] \| Oil and Gas [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	30,624,000	198,864,000	109,302,000	421,965,000
Distribution and Services [Member] \| Commercial and Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 129,548,000	$ 167,892,000	$ 291,539,000	$ 321,291,000

Segment Data (Details)	3 Months Ended		6 Months Ended
Segment Data (Details)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Data [Abstract]
Number of reportable segments \| Segment			2
Revenues [Abstract]
Revenues	$ 541,159,000	$ 771,042,000	$ 1,185,085,000	$ 1,515,663,000
Segment profit (loss)	23,834,000	62,709,000	(495,938,000)	121,046,000
Total assets	6,017,011,000		6,017,011,000		$ 6,079,097,000
Other segment disclosures [Abstract]
Gain (loss) on disposition of assets	(189,000)	3,118,000	303,000	5,275,000
Interest expense	(12,708,000)	(15,515,000)	(25,507,000)	(28,716,000)
Other income	2,290,000	2,381,000	5,013,000	1,813,000
Earnings (loss) before taxes on income	23,834,000	62,709,000	(495,938,000)	121,046,000
Marine Transportation [Member]
Revenues [Abstract]
Revenues	380,987,000	404,286,000	784,244,000	772,407,000
Distribution and Services [Member]
Revenues [Abstract]
Revenues	160,172,000	366,756,000	400,841,000	743,256,000
Other [Member]
Revenues [Abstract]
Segment profit (loss)	(13,394,000)	(13,662,000)	(587,600,000)	(28,358,000)
Total assets	326,548,000		326,548,000		120,335,000
Other segment disclosures [Abstract]
General corporate expenses	(2,787,000)	(3,646,000)	(6,135,000)	(6,730,000)
Gain (loss) on disposition of assets	(189,000)	3,118,000	303,000	5,275,000
Impairments and other charges	0	0	(561,274,000)	0
Interest expense	(12,708,000)	(15,515,000)	(25,507,000)	(28,716,000)
Other income	2,290,000	2,381,000	5,013,000	1,813,000
Earnings (loss) before taxes on income	(13,394,000)	(13,662,000)	(587,600,000)	(28,358,000)
Details of "Other" total assets [Abstract]
General corporate assets	324,293,000		324,293,000		118,310,000
Investment in affiliates	2,255,000		2,255,000		2,025,000
Total other assets	326,548,000		326,548,000		120,335,000
Reporting Segments [Member] \| Marine Transportation [Member]
Revenues [Abstract]
Revenues	380,987,000	404,286,000	784,244,000	772,407,000
Segment profit (loss)	51,375,000	53,243,000	102,091,000	88,667,000
Total assets	4,843,477,000		4,843,477,000		4,536,368,000
Other segment disclosures [Abstract]
Earnings (loss) before taxes on income	51,375,000	53,243,000	102,091,000	88,667,000
Reporting Segments [Member] \| Distribution and Services [Member]
Revenues [Abstract]
Revenues	160,172,000	366,756,000	400,841,000	743,256,000
Segment profit (loss)	(14,147,000)	23,128,000	(10,429,000)	60,737,000
Total assets	846,986,000		846,986,000		$ 1,422,394,000
Other segment disclosures [Abstract]
Earnings (loss) before taxes on income	(14,147,000)	23,128,000	(10,429,000)	60,737,000
Intersegment Eliminations [Member]
Revenues [Abstract]
Revenues	6,061,000	7,446,000	16,347,000	14,981,000
Segment profit (loss)	606,000	744,000	1,635,000	1,498,000
Other segment disclosures [Abstract]
Earnings (loss) before taxes on income	$ 606,000	$ 744,000	$ 1,635,000	$ 1,498,000

Long-Term Debt (Details) - USD ($)		6 Months Ended
Long-Term Debt (Details) - USD ($)	Feb. 27, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Long-term Debt [Abstract]
Payments on long-term debt		$ 150,000,000	$ 0
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		1,642,839,000		$ 1,369,767,000
Fair value		1,758,604,000		1,421,325,000
Unamortized debt discounts and issuance costs		(7,168,000)		(5,249,000)
Borrowings and Payments under the Revolving Credit Facility [Abstract]
Borrowings (Payments) on bank credit facilities		$ 424,991,000	(313,805,000)
2.72% Senior Notes Due February 27, 2020 [Member]
Long-term Debt [Abstract]
Interest rate		2.72%
Maturity Date		Feb. 27, 2020
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		$ 0		150,000,000
Fair value		$ 0		151,547,000
3.29% Senior Notes Due February, 27 2023 [Member]
Long-term Debt [Abstract]
Interest rate		3.29%
Maturity Date		Feb. 27, 2023
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		$ 350,000,000		350,000,000
Fair value		$ 366,605,000		353,216,000
4.2% Senior Notes Due March March 1, 2028 [Member]
Long-term Debt [Abstract]
Interest rate		4.20%
Maturity Date		Mar. 01, 2028
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		$ 500,000,000		500,000,000
Fair value		591,992,000		541,546,000
Bank Note Payable [Member]
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		7,000		16,000
Fair value		7,000		16,000
Revolving Credit Facility [Member]
Long-term Debt [Abstract]
Maximum borrowing capacity		$ 850,000,000
Credit facility, expiration date		Mar. 27, 2024
Credit facility, amount outstanding		$ 425,000,000
Credit facility and borrowings, amount available		$ 419,637,000
Interest rate		1.60%
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		$ 425,000,000		0
Fair value		425,000,000		0
Borrowings and Payments under the Revolving Credit Facility [Abstract]
Borrowings on bank credit facilities		582,038,000	1,276,716,000
Payments on bank credit facilities		(157,047,000)	(1,590,521,000)
Borrowings (Payments) on bank credit facilities		$ 424,991,000	$ (313,805,000)
Term Loan [Member]
Long-term Debt [Abstract]
Debt instrument, frequency of periodic payment		quarterly
Term loan		$ 343,750,000
Credit facility and borrowings, amount available		$ 375,000,000
Interest rate		1.60%
Carrying Value and Fair Value of Debt Outstanding [Abstract]
Carrying value		$ 375,000,000		375,000,000
Fair value		$ 375,000,000		$ 375,000,000
Term Loan [Member] \| 2.72% Senior Notes Due February 27, 2020 [Member]
Long-term Debt [Abstract]
Payments on long-term debt	$ 150,000,000

Impairments and Other Charges (Details) - USD ($)	3 Months Ended	6 Months Ended
Impairments and Other Charges (Details) - USD ($)	Mar. 31, 2020	Jun. 30, 2020
Impairments and Other Charges [Abstract]
Impairment charge	$ 165,304,000
Non-cash write-down	8,000,000
Changes in Goodwill [Roll Forward]
Balance (gross)	973,995,000	$ 973,995,000
Accumulated impairment and amortization	(20,169,000)	(20,169,000)
Balance	953,826,000	953,826,000
Impairment		(387,970,000)
Savage acquisition		81,667,000
Convoy acquisition		10,309,000
Balance (gross)		1,065,971,000
Accumulated impairment and amortization		(408,139,000)
Balance		657,832,000
Marine Transportation [Member]
Changes in Goodwill [Roll Forward]
Balance (gross)	424,149,000	424,149,000
Accumulated impairment and amortization	(18,574,000)	(18,574,000)
Balance	405,575,000	405,575,000
Impairment		0
Savage acquisition		81,667,000
Convoy acquisition		0
Balance (gross)		505,816,000
Accumulated impairment and amortization		(18,574,000)
Balance		487,242,000
Distribution and Services [Member]
Changes in Goodwill [Roll Forward]
Balance (gross)	549,846,000	549,846,000
Accumulated impairment and amortization	(1,595,000)	(1,595,000)
Balance	$ 548,251,000	548,251,000
Impairment		(387,970,000)
Savage acquisition		0
Convoy acquisition		10,309,000
Balance (gross)		560,155,000
Accumulated impairment and amortization		(389,565,000)
Balance		$ 170,590,000

Leases, Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Leases, Lease Cost (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease Cost [Abstract]
Operating lease cost	$ 11,873	$ 9,893	$ 20,914	$ 19,971
Variable lease cost	444	515	596	1,031
Short-term lease cost	5,076	8,963	13,353	16,855
Sublease income	(130)	(318)	(374)	(558)
Total lease cost	$ 17,263	$ 19,053	$ 34,489	$ 37,299

Leases, Other Supplemental Information (Details)	Jun. 30, 2020	Dec. 31, 2019
Other Supplemental Information about Operating Leases [Abstract]
Weighted average discount rate	4.10%	4.00%
Weighted average remaining lease term	10 years	11 years

Stock Award Plans (Details)	6 Months Ended
Stock Award Plans (Details)	Jun. 30, 2020 shares
Employee Stock Award Plan [Member] \| RSUs [Member]
Stock Award Plan Information [Abstract]
Number of restricted stock and units granted (in shares)	153,460
Vesting period	5 years
Employee Stock Award Plan [Member] \| Stock Options [Member]
Stock Award Plan Information [Abstract]
Number of stock options granted (in shares)	114,600
Vesting period	3 years
Stock options expiration period	7 years
Director Plan [Member] \| Restricted Stock [Member]
Stock Award Plan Information [Abstract]
Number of restricted stock and units granted (in shares)	39,913
Vesting period	6 months

Taxes on Income (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Taxes on Income (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2017
Income Taxes [Abstract]
Effective income tax rate			21.00%		35.00%
Tax refund amount	$ (30,606,000)		$ (30,606,000)
Income tax receivable	125,883,000		125,883,000
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	23,834,000	$ 62,709,000	(495,938,000)	$ 121,046,000
Federal [Abstract]
Current	(18,608,000)	0	(156,304,000)	0
Deferred	16,149,000	13,517,000	(7,294,000)	26,007,000
State and local [Abstract]
Current	536,000	1,686,000	618,000	3,145,000
Deferred	505,000	0	(11,294,000)	0
Foreign - current	(11,000)	66,000	36,000	(3,000)
Total Provision for taxes on income	$ (1,429,000)	15,269,000	(174,238,000)	29,149,000
COVID-19 [Member]
Income Taxes [Abstract]
Operating losses tax year	2013 2014 2015 2016 2017
Tax benefit related to CARES Act	$ (50,824,000)
Decrease in deferred tax asset	$ (77,262,000)
COVID-19 [Member] \| Maximum [Member]
Income Taxes [Abstract]
Number of years net operating losses carried	5 years
United States [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ 23,861,000	62,903,000	(495,628,000)	121,655,000
Foreign [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ (27,000)	$ (194,000)	$ (310,000)	$ (609,000)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Details of inventories [Abstract]
Finished goods	$ 280,948	$ 291,214
Work in process	55,010	60,187
Inventories - net	$ 335,958	$ 351,401

Retirement Plans (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
Retirement Plans (Details) - USD ($)	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Retirement Plans [Abstract]
Service period of participants not impacted by pension plan amendment				15 years
Age of plan participants not impacted by pension plan amendment				50 years
Service period of participants who are age fifty not impacted by pension plan amendment				10 years
Pension plan defined benefit plan cost increase limit percentage				4.00%
Plan 2019 [Member]
Retirement Plans [Abstract]
Expected pension contributions		$ 314,000		$ 314,000
Plan 2020 [Member]
Retirement Plans [Abstract]
Expected pension contributions		479,000		479,000
Higman [Member] \| Plan 2019 [Member]
Retirement Plans [Abstract]
Pension contributions				483,000
Higman [Member] \| Plan 2020 [Member]
Retirement Plans [Abstract]
Pension contributions				479,000
Higman [Member] \| Plan 2020 [Member] \| Subsequent Events [Member]
Retirement Plans [Abstract]
Pension contributions	$ 479,000
Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost		1,919,000	$ 1,914,000	3,836,000	$ 3,682,000
Interest cost		3,949,000	4,040,000	7,839,000	8,247,000
Expected return on plan assets		(5,735,000)	(5,254,000)	(11,923,000)	(10,478,000)
Amortization of actuarial loss		425,000	41,000	657,000	719,000
Net periodic benefit cost		558,000	741,000	409,000	2,170,000
SERP [Member]
Components of net periodic benefit cost [Abstract]
Service cost		0	0	0	0
Interest cost		10,000	13,000	20,000	26,000
Expected return on plan assets		0	0	0	0
Amortization of actuarial loss		9,000	7,000	18,000	14,000
Net periodic benefit cost		19,000	20,000	38,000	40,000
Other Postretirement Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost		0	0	0	0
Interest cost		5,000	8,000	11,000	16,000
Amortization of actuarial loss		(130,000)	(135,000)	(261,000)	(270,000)
Net periodic benefit cost		$ (125,000)	$ (127,000)	$ (250,000)	$ (254,000)

Contingencies (Details)	6 Months Ended
Contingencies (Details)	Jun. 30, 2020 USD ($)	May 10, 2019 Vessel	Mar. 22, 2014 TankBarge Vessel
Guaranties [Abstract]
Issued guaranties	$ 23,169,000
Maximum [Member]
Guaranties [Abstract]
Guarantor obligations, expiration period	2 years
Performance Bonds [Member]
Guaranties [Abstract]
Issued guaranties	$ 11,824,000
Struck by LPG Tanker, the Genesis River [Member]
Loss Contingency [Abstract]
Number of vessels involved in collision \| Vessel		2
Collision with M/S Summer Wind [Member]
Loss Contingency [Abstract]
Number of vessels involved in collision \| Vessel			2
Number of vessels damaged in collision resulting in fuel oil discharge \| TankBarge			1
Letters of Credit [Member]
Guaranties [Abstract]
Issued guaranties	$ 11,345,000