Seacor (CKH) 10-Q 28 Jul 20 2020 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 24, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	1-12289
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3542736
Entity Address, Address Line One	2200 Eller Drive, P.O. Box 13038
Entity Address, City or Town	Fort Lauderdale
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33316
City Area Code	954
Local Phone Number	523-2200
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CKH
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		20,339,641
Entity Registrant Name	SEACOR HOLDINGS INC /NEW/
Entity Central Index Key	0000859598
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 128,389	$ 77,222
Restricted cash and restricted cash equivalents	1,119	1,222
Marketable securities	6,418	7,936
Receivables:
Trade, net of allowance for doubtful accounts of $2,618 and $2,871 in 2020 and 2019, respectively	179,350	194,022
Trade receivables, allowance for doubtful accounts	2,618	2,871
Other	64,098	38,881
Inventories	3,668	5,255
Prepaid expenses and other	6,705	6,971
Total current assets	389,747	331,509
Property and Equipment:
Historical cost	1,439,245	1,442,382
Accumulated depreciation	(647,400)	(624,024)
Net property and equipment	791,845	818,358
Operating Lease Right-of-Use Assets	131,628	144,539
Investments, at Equity, and Advances to 50% or Less Owned Companies	152,228	157,108
Goodwill	32,626	32,701
Intangible Assets, Net	21,990	20,996
Other Assets	8,718	7,761
Total Assets	1,528,782	1,512,972
Current Liabilities:
Current portion of long-term debt	44,819	58,854
Current portion of long-term operating lease liabilities	37,441	36,011
Current portion of other long-term financial liabilities	1,466	0
Accounts payable and accrued expenses	46,129	57,595
Other current liabilities	77,901	57,501
Total current liabilities	207,756	209,961
Long-Term Debt	239,698	255,612
Long-Term Operating Lease Liabilities	93,867	108,295
Other Long-Term Financial Liabilities	32,076	0
Deferred Income Taxes	113,586	105,661
Deferred Gains and Other Liabilities	19,320	20,929
Total liabilities	706,303	700,458
SEACOR Holdings Inc. stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized; none issued nor outstanding	$ 0	0
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000
Common stock, $0.01 par value, 60,000,000 shares authorized; 41,012,192 and 40,819,892 shares issued in 2020 and 2019, respectively	$ 410	$ 408
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	60,000,000
Common stock, shares issued (in shares)	41,012,192	40,819,892
Additional paid-in capital	$ 1,664,617	$ 1,661,002
Retained earnings	526,457	517,106
Shares held in treasury of 20,672,551 and 20,643,724 in 2020 and 2019, respectively, at cost	$ (1,366,787)	$ (1,365,792)
Treasury stock, shares held in treasury (in shares)	20,672,551	20,643,724
Accumulated other comprehensive loss, net of tax	$ (2,998)	$ (998)
Stockholders' equity attributable to parent, total	821,699	811,726
Noncontrolling interests in subsidiaries	780	788
Total equity	822,479	812,514
Liabilities and stockholders' equity, total	$ 1,528,782	$ 1,512,972

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Operating Revenues	$ 172,585	$ 197,023	$ 364,881	$ 406,547
Costs and Expenses:
Operating	126,178	142,871	272,206	289,982
Administrative and general	23,204	26,714	52,225	53,460
Depreciation and amortization	17,585	17,009	35,314	34,145
Total costs and expenses	166,967	186,594	359,745	377,587
Gains on Asset Dispositions, Net	8,198	677	8,582	1,114
Operating Income	13,816	11,106	13,718	30,074
Other Income (Expense):
Interest income	1,518	1,885	3,119	3,785
Interest expense	(4,179)	(4,903)	(8,649)	(10,016)
Debt extinguishment gains (losses), net	1,921	(503)	1,602	(1,296)
Marketable security gains (losses), net	(1,414)	13,284	(1,518)	16,352
Foreign currency gains (losses), net	1,743	(191)	(2,839)	214
Other, net	658	25	750	(619)
Total Other Nonoperating Expense	247	9,597	(7,535)	8,420
Income Before Income Tax Expense (Benefit) and Equity in Losses of 50% or Less Owned Companies	14,063	20,703	6,183	38,494
Income Tax Expense (Benefit)	3,206	3,390	(10,936)	5,595
Income Before Equity in Losses of 50% or Less Owned Companies	10,857	17,313	17,119	32,899
Equity in Losses of 50% or Less Owned Companies, Net of Tax	(2,982)	(312)	(7,775)	(2,830)
Net Income	7,875	17,001	9,344	30,069
Net Income (Loss) Attributable to Noncontrolling Interests in Subsidiaries	(9)	2,448	(7)	7,783
Net Income Attributable to SEACOR Holdings Inc.	$ 7,884	$ 14,553	$ 9,351	$ 22,286
Basic Earnings Per Common Share of SEACOR Holdings Inc. (in dollars per share)	$ 0.39	$ 0.80	$ 0.47	$ 1.22
Diluted Earnings Per Common Share of SEACOR Holdings Inc. (in dollars per share)	$ 0.39	$ 0.76	$ 0.47	$ 1.17
Weighted Average Common Shares Outstanding:
Basic (in shares)	19,980,830	18,288,879	19,965,637	18,260,876
Diluted (in shares)	21,099,079	19,633,523	19,986,582	19,599,990
Gain (Loss) on Disposition of Property Plant Equipment			$ 7,900

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 7,875	$ 17,001	$ 9,344	$ 30,069
Other Comprehensive Loss:
Foreign currency translation gains (losses), net	45	(92)	(951)	(13)
Derivative losses on cash flow hedges	(137)	0	(1,055)	0
Other comprehensive loss	(92)	(92)	(2,006)	(13)
Income tax benefit (expense)	3	0	6	(68)
Other comprehensive loss, net of tax	(89)	(92)	(2,000)	(81)
Comprehensive Income	7,786	16,909	7,344	29,988
Comprehensive Income (Loss) Attributable to Noncontrolling Interests in Subsidiaries	(9)	2,448	(7)	7,783
Comprehensive Income Attributable to SEACOR Holdings Inc.	$ 7,795	$ 14,461	$ 7,351	$ 22,205

Condensed Consolidated Statem_3

Condensed Consolidated Statement Of Changes In Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Noncontrolling Interests In Subsidiaries
Total equity, beginning balance at Dec. 31, 2018	$ 853,842	$ 390	$ 1,596,642	$ 474,809	$ (1,366,773)	$ (914)	$ 149,688
Issuance of common stock:
Employee Stock Purchase Plan	857				857
Exercise of stock options	1,734		1,734
Director stock awards	55		55
Restricted stock	0	2	(2)
Purchase of conversion option in convertible debt, net of tax	(103)		(103)
Purchase of treasury shares	(516)				(516)
Amortization of share awards	2,512		2,512
Distributions to noncontrolling interests	(5,071)						(5,071)
Net income (loss)	30,069			22,286			7,783
Other comprehensive loss	(81)					(81)
Total equity, ending balance at Jun. 30, 2019	908,657	392	1,600,838	512,618	(1,366,432)	(995)	162,236
Total equity, beginning balance at Mar. 31, 2019	894,794	392	1,598,804	498,065	(1,366,267)	(903)	164,703
Issuance of common stock:
Exercise of stock options	861		861
Director stock awards	22		22
Purchase of conversion option in convertible debt, net of tax	(103)		(103)
Purchase of treasury shares	(165)				(165)
Amortization of share awards	1,254		1,254
Distributions to noncontrolling interests	(4,915)						(4,915)
Net income (loss)	17,001			14,553			2,448
Other comprehensive loss	(92)					(92)
Total equity, ending balance at Jun. 30, 2019	908,657	392	1,600,838	512,618	(1,366,432)	(995)	162,236
Total equity, beginning balance at Dec. 31, 2019	812,514	408	1,661,002	517,106	(1,365,792)	(998)	788
Issuance of common stock:
Employee Stock Purchase Plan	949				949
Exercise of stock options	563		563
Director stock awards	38		38
Restricted stock	0	2	(2)
Purchase of treasury shares	(1,944)				(1,944)
Amortization of share awards	3,016		3,016
Distributions to noncontrolling interests	(1)						(1)
Net income (loss)	9,344			9,351			(7)
Other comprehensive loss	(2,000)					(2,000)
Total equity, ending balance at Jun. 30, 2020	822,479	410	1,664,617	526,457	(1,366,787)	(2,998)	780
Total equity, beginning balance at Mar. 31, 2020	813,014	410	1,662,938	518,573	(1,366,787)	(2,909)	789
Issuance of common stock:
Exercise of stock options	142		142
Director stock awards	17		17
Amortization of share awards	1,520		1,520
Net income (loss)	7,875			7,884			(9)
Other comprehensive loss	(89)					(89)
Total equity, ending balance at Jun. 30, 2020	$ 822,479	$ 410	$ 1,664,617	$ 526,457	$ (1,366,787)	$ (2,998)	$ 780

Condensed Consolidated Statem_4

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Cash Flows [Abstract]
Net Cash Provided by Operating Activities	$ 57,177	$ 51,508
Cash Flows from Investing Activities:
Purchases of property and equipment	(12,417)	(7,750)
Proceeds from disposition of property and equipment	9,198	118
Investments in and advances to 50% or less owned companies	(3,688)	(3,215)
Return of investments and advances from 50% or less owned companies	600	3,677
Payments received on third-party leases and notes receivable, net	31	260
Business acquisitions, net of cash acquired	(970)	0
Net cash used in investing activities	(7,246)	(6,910)
Cash Flows from Financing Activities:
Payments on long-term debt	(31,828)	(46,499)
Payments for long-term debt issue costs	0	(2,197)
Proceeds from other long-term financial liabilities	33,662	0
Payments of other long-term financial liabilities	(120)	0
Purchase of conversion option in convertible debt	0	(130)
Common stock acquired for treasury	(1,944)	(516)
Proceeds from share award plans	1,512	2,591
Distributions to noncontrolling interests	(1)	(5,071)
Net cash provided by (used in) financing activities	1,281	(51,822)
Effects of Exchange Rate Changes on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(148)	(10)
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	51,064	(7,234)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	78,444	147,212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	129,508	139,978
Restricted Cash and Restricted Cash Equivalents, End of Period	1,119	1,221
Cash and Cash Equivalents, End of Period	$ 128,389	$ 138,757

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	1. BASIS OF PRESENTATION AND ACCOUNTING POLICIES Unless the context otherwise indicates, any reference in this Quarterly Report on Form 10-Q to the “Company” refers to SEACOR Holdings Inc. and its consolidated subsidiaries and any reference in this Quarterly Report on Form 10-Q to “SEACOR” refers to SEACOR Holdings Inc. without its consolidated subsidiaries. Capitalized terms used and not specifically defined herein have the same meaning given to those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2019. The condensed consolidated financial information for the three and six months ended June 30, 2020 and 2019 has been prepared by the Company and has not been audited by its independent registered certified public accounting firm. The condensed consolidated financial statements include the accounts of SEACOR Holdings Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments (consisting of normal recurring adjustments) have been made to fairly present the Company’s financial position as of June 30, 2020, its results of operations for the three and six months ended June 30, 2020 and 2019, its comprehensive income for the three and six months ended June 30, 2020 and 2019, its changes in equity for the three and six months ended June 30, 2020 and 2019, and its cash flows for the six months ended June 30, 2020 and 2019. Results of operations for the interim periods presented are not necessarily indicative of operating results for the full year or any future periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. Recent Developments. In March 2020, the World Health Organization declared the outbreak of a novel coronavirus ("COVID-19") as a pandemic, which continues to spread throughout the United States and the world. The spread of COVID-19 has caused significant volatility in U.S. and international markets and there is significant uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. and international economies. The Company's overall business, results of operations and financial condition have been adversely affected by the COVID-19 outbreak. The COVID-19 pandemic is a dynamic and continuously evolving phenomenon and the ultimate severity of the outbreak, and its effect on the Company's business in the future, is uncertain. If the pandemic worsens, additional restrictions are implemented or current restrictions are imposed for a longer period of time to contain the outbreak, the Company may experience a material adverse effect on its businesses, results of operations and financial condition, which could result in impairments in future periods. Adoption of New Accounting Standards. On January 1, 2020, the Company adopted Financial Accounting Standards Board (“FASB”) Topic 326, Financial Instruments - Credit Losses (“Topic 326”), which replaces the current incurred loss impairment methodology for financial assets and other assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates. As part of the Company's assessment of the adequacy of its allowances for credit losses, it considered a number of factors including, but not limited to, customer credit ratings and payment history, bankruptcy filings, published or estimated credit default rates, age of receivables, expected loss rates and collateral exposures. The adoption of Topic 326 using a modified retrospective approach did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. On January 1, 2019, the Company adopted FASB Topic 842, Leases (“Topic 842”) using a modified prospective approach and implemented internal controls and systems to enable the preparation of financial information upon adoption. The Company elected the available practical expedients permitted under the guidance including the option to not separate lease and nonlease components in calculating the right-of-use assets and corresponding lease liabilities and to not apply the recognition requirements of Topic 842 to short-term leases (leases that have a duration of twelve months or less at lease inception). Generally, it was not possible for the Company to determine the interest rate implicit in each of its operating leases and therefore used its incremental borrowing rate in calculating operating lease right-of-use assets and lease liabilities. The Company assigned its leases to portfolios based on the remaining term at the time of adoption and applied a single rate to each portfolio of leases as the result was not materially different than using a specific discount rate for each individual lease. The Company included renewal options that were reasonably certain of being exercised in determining the lease term. Upon adoption, the Company recognized a cumulative-effect adjustment of $25.4 million, net of tax, to the opening balance of retained earnings primarily for previously deferred gains related to sale-leaseback transactions. Revenue Recognition. The Company earns revenues from contracts with customers and from lease contracts. Revenue from Contracts with Customers. Revenue is recognized when (or as) the Company transfers promised goods or services to its customers in amounts that reflect the consideration to which the Company expects to be entitled to in exchange for those goods or services, which occurs when (or as) the Company satisfies its contractual obligations and transfers control of the promised goods or services to its customers. Costs to obtain or fulfill a contract are expensed as incurred. Ocean Services' revenues from contracts with customers primarily arise from voyage charters, contracts of affreightment, tariff based port and infrastructure services, unit freight logistics services, and technical ship management agreements with vessel owners (see Note 16). Ocean Services transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Voyage charters are contracts to carry cargoes on a single voyage basis for a predetermined price, regardless of time to complete. Contracts of affreightment are contracts for cargoes that are committed on a multi-voyage basis for various periods of time, with minimum and maximum cargo tonnages specified over the period at a fixed or escalating rate per ton. Tariff based port and infrastructure services typically include operating harbor tugs alongside oceangoing vessels to escort them to their berth, assisting with the docking and undocking of these oceangoing vessels and escorting them back out to sea. They are contracted using prevailing port tariff terms on a per-use basis. In the unit freight logistics trade, transportation services typically include transporting shipping containers, rail cars, project cargoes, automobiles and U.S. military vehicles and are generally contracted on a per unit basis for the specified cargo and destination, typically in accordance with a publicly available tariff rate or based on a negotiated rate when moving larger volumes over an extended period. Managed services include technical ship and crew management agreements whereby Ocean Services provides technical ship and crew management services to third-party customers for a predetermined price over a specified period of time, typically a year or more. Inland Services' revenues from contracts with customers primarily arise from contracts of affreightment, terminal operations, fleeting operations and repair and maintenance services (see Note 16). Inland Services transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Contracts of affreightment are contracts whereby customers are charged an established rate per ton to transport cargo from point-to-point. Terminal operations includes tank farms and dry bulk and container handling facilities that are marketed under contractual rates and terms driven by throughput volume. Fleeting operations includes fleeting services whereby barges are held in fleeting areas for an agreed-upon day rate and shifting services whereby harbor boats are used to pick up and drop off barges to assist in assembling tows and to move barges to and from the dock for loading and unloading at predetermined per-shift fees. Other operations primarily include a machine shop specializing in towboat and barge cleaning, repair and maintenance services that are charged on an hourly or a fixed fee basis depending on the scope and nature of the work. Witt O’Brien’s revenues from contracts with customers primarily arise from time and material and retainer contracts (see Note 16). Witt O’Brien’s transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Time and material contracts primarily relate to emergency response, debris management or consulting services that Witt O’Brien’s performs for a predetermined fee. Retainer contracts, which are nearly all with vessel services operators and oil companies, are contracted based on agreed-upon rates. The Company’s Other business segment includes Cleancor, which primarily earns revenues from the sale of liquefied natural gas (see Note 16). Under these arrangements, control of the goods are transferred to the customer and performance obligations are satisfied at a point in time, and therefore revenue is recognized upon delivery while any related costs are expensed as incurred. Contract liabilities from contracts with customers arise when the Company has received consideration prior to performance and are included in other current liabilities in the accompanying consolidated balance sheets. The Company’s contract liability activity for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 794 $ 968 Previously deferred revenues recognized upon completion of performance obligations during the period (621) (700) Net contract liabilities arising during the period 5,790 5,443 Balance at end of period $ 5,963 $ 5,711 Lease Revenues. The Company’s lease revenues are primarily from time charters, bareboat charters and non-vessel rental agreements that are recognized ratably over the lease term as services are provided, typically on a per day basis. Under a time charter, the Company provides a vessel to a customer for a set term and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, the Company provides a vessel to a customer for a set term and the customer assumes responsibility for all operating expenses and risks of operation. Under a non-vessel rental agreement, the Company provides non-vessel property or equipment to a customer for a set term and the customer assumes responsibility for all operating expenses and risks of operation. Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older assets that have already exceeded their useful life as set forth in the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of June 30, 2020, the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Petroleum and chemical carriers - U.S.-flag 25 Bulk carriers - U.S.-flag 25 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Short-sea container/RORO (1) vessels 20 Inland river dry-cargo and specialty barges 20 Inland river liquid tank barges 25 Inland river towboats and harbor boats 25 Terminal and fleeting facilities 20 ______________________ (1) Roll On/Roll Off. Equipment maintenance and repair costs including the costs of routine overhauls, dry-dockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. As of June 30, 2020, the Company had construction in progress of $16.4 million that primarily consisted of the construction of harbor tugs, an inland river towboat and other machinery and equipment and is included in historical cost in the accompanying condensed consolidated balance sheets. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. During the six months ended June 30, 2020, capitalized interest totaled $0.1 million. Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying values of the assets are not recoverable, as determined by the estimated undiscounted cash flows, the estimated fair value of the assets or asset groups are compared to their current carrying value and impairment charges are recorded if the carrying value exceeds fair value. The Company performs its testing on an asset or asset group basis. The Company’s estimates of undiscounted cash flows are highly subjective and actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the six months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to long-lived assets held for use. Impairment of 50% or Less Owned Companies. Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the carrying value of the investment. In its evaluation, the Company considers, among other items, recent and expected financial performance and returns, impairments recorded by the investee and the capital structure of the investee. When the Company determines the estimated fair value of an investment is below carrying value and the decline is other-than-temporary, the investment is written down to its estimated fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance, the severity and expected duration of declines in value and the available liquidity in the capital markets to support the continuing operations of the investee, among other factors. Although the Company believes its assumptions and estimates are reasonable, the investee’s actual performance compared with the estimates could produce different results and lead to additional impairment charges in future periods. During the six months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to its 50% or less owned companies. Income Taxes. During the six months ended June 30, 2020, the Company’s effective income tax rate of (176.9)% was lower than the statutory rate primarily due to a benefit from a statutory change to the U.S. federal income tax code and income subject to tonnage tax, partially offset by subpart F income and state taxes (see Note 8 ). During the six months ended June 30, 2019, the Company's effective income tax rate of 14.5% was lower than the statutory rate primarily due to tax not provided on income attributable to noncontrolling interests, foreign sourced income not subject to U.S. tax and income subject to tonnage tax, partially offset by foreign taxes not creditable against U.S. income tax. Deferred Gains. The Company has sold certain equipment to its 50% or less owned companies, entered into vessel sale-leaseback transactions with finance companies and provided seller financing on sales of its equipment to third parties and its 50% or less owned companies. A portion of the gains realized from these transactions were deferred and recorded in deferred gains and other liabilities in the accompanying condensed consolidated balance sheets. Deferred gain activity related to these transactions for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 12,008 $ 43,664 Impact of adoption of accounting principle (1) — (29,207) Amortization of deferred gains included in gains on asset dispositions, net (661) (1,001) Balance at end of period $ 11,347 $ 13,456 ______________________ (1) On January 1, 2019, the Company adopted Topic 842 and reduced deferred gains associated with sale-leaseback transactions through a beginning period retained earnings adjustment. Earnings Per Share. Basic earnings per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding plus the effect of potentially dilutive securities through the application of the treasury stock and if-converted methods. Dilutive securities for this purpose assumes restricted stock grants have vested, common shares have been issued pursuant to the exercise of outstanding stock options and common shares have been issued pursuant to the conversion of all outstanding convertible notes. Computations of basic and diluted earnings per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended June 30, Six Months Ended June 30, Net Income attributable to SEACOR Average O/S Shares Per Share Net Income Attributable to SEACOR Average O/S Shares Per Share 2020 Basic Weighted Average Common Shares Outstanding $ 7,884 19,980,830 $ 0.39 $ 9,351 19,965,637 $ 0.47 Effect of Dilutive Securities: Options and Restricted Stock (1) — 2,109 — 20,945 Convertible Notes (2) 293 1,116,140 — — Diluted Weighted Average Common Shares Outstanding $ 8,177 21,099,079 $ 0.39 $ 9,351 19,986,582 $ 0.47 2019 Basic Weighted Average Common Shares Outstanding $ 14,553 18,288,879 $ 0.80 $ 22,286 18,260,876 $ 1.22 Effect of Dilutive Securities: Options and Restricted Stock (3) — 117,543 — 112,013 Convertible Notes (4) 318 1,227,101 637 1,227,101 Diluted Weighted Average Common Shares Outstanding $ 14,871 19,633,523 $ 0.76 $ 22,923 19,599,990 $ 1.17 ______________________ (1) For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,806,185 and 1,738,756, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,171,620 of common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 434,101 and 503,852, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes, and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 893,722 and 919,121, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (4) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 958,418 and 1,129,370, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. New Accounting Pronouncements. On January 26, 2017, the FASB issued an amendment to the accounting standards that simplified wording and removed step two of the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform step two of the goodwill test. The new standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2020, with early adoption permitted for interim or annual goodwill impairment tests on testing dates after January 1, 2017. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On December 18, 2019, the FASB issued an amendment to the accounting standards that enhances and simplifies various aspects of the income tax accounting guidance including the elimination of certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows .

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2020
Business Combinations [Abstract]
Business Acquisitions	2. BUSINESS ACQUISITIONS Navigate. On February 21, 2020, the Company acquired Helix Media Pte. Ltd., Navigate Response (Asia) Pte. Ltd., Navigate PR Ltd., and Navigate Response Limited (collectively "Navigate"), a global crisis communications network specializing in the international shipping, port and offshore industries, for $3.6 million. The purchase price consisted of $1.0 million in cash, net of cash acquired of $0.8 million, paid at the closing of the acquisition and $1.8 million of contingent consideration that is payable upon Navigate meeting certain specified cash collection and client retention targets for the 24 months following the acquisition date. The Company performed a preliminary fair value analysis and the purchase price was allocated to the acquired assets and liabilities based on their fair value resulting in no goodwill being recorded. During the six months ended June 30, 2020, the Company paid $0.1 million of the contingent consideration. Purchase Price Allocation. The allocation of the purchase price for the Company’s acquisition for the six months ended June 30 was as follows (in thousands): 2020 Trade and other receivables $ 295 Other current assets 103 Property and Equipment 5 Intangible Assets 3,078 Accounts payable and other accrued liabilities (31) Other current liabilities (1) (2,113) Other Liabilities (1) (367) Purchase price (2) $ 970 ______________________ (1) Includes contingent consideration. (2) Purchase price is net of cash acquired totaling $0.8 million.

Equipment Acquisitions and Disp

Equipment Acquisitions and Dispositions	6 Months Ended
	Jun. 30, 2020
Property, Plant and Equipment [Abstract]
Equipment Acquisitions and Dispositions	3. EQUIPMENT ACQUISITIONS AND DISPOSITIONS During the six months ended June 30, 2020, capital expenditures were $12.4 million and primarily related to the construction of harbor tugs and the purchase of machinery and equipment. During the six months ended June 30, 2020, the Company sold 39 inland river dry-cargo barges and other equipment for net proceeds of $9.2 million and gains of $7.9 million. In addition, the Company recognized previously deferred gains of $0.7 million. During the six months ended June 30, 2020, the Company also sold and leased back three U.S.-flag harbor tugs for $33.7 million with leaseback terms ranging from 72-84 months. The Company determined that these transactions resulted in "failed" sale-leasebacks in accordance with Topic 842 and Topic 606 and as a result, did not qualify for sale or lease accounting (see Note 7).

Investments, At Equity, And Adv

Investments, At Equity, And Advances To 50% Or Less Owned Companies	6 Months Ended
	Jun. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Investments, At Equity, And Advances To 50% Or Less Owned Companies	4. INVESTMENTS, AT EQUITY, AND ADVANCES TO 50% OR LESS OWNED COMPANIES Trailer Bridge. Trailer Bridge is an operator of U.S.-flag deck and RORO barges and provides marine transportation services between Jacksonville, Florida, San Juan, Puerto Rico and Puerto Plata, Dominican Republic. During the six months ended June 30, 2020, the Company earned revenues of $2.0 million from the time charter of one U.S.-flag offshore tug to Trailer Bridge. RF Vessel Holdings. RF Vessel Holdings owns two foreign-flag rail ferries. During the six months ended June 30, 2020, the Company and its partner each contributed capital of $2.0 million to RF Vessel Holdings. Golfo de Mexico. Golfo de Mexico operates the two foreign-flag rail ferries owned by RF Vessel Holdings. During the six months ended June 30, 2020, the Company and its partner each contributed capital of $0.5 million to Golfo de Mexico. KSM. KSM operates four foreign-flag harbor tugs, one foreign-flag ocean liquid tank barge and two foreign-flag specialty vessels in Freeport, Grand Bahama. During the six months ended June 30, 2020, the Company earned revenues of $0.8 million from the bareboat charter of two foreign-flag harbor tugs to KSM. Bunge-SCF Grain. Bunge-SCF Grain operates terminal grain elevators in Illinois. During the six months ended June 30, 2020, the Company earned revenues of $0.4 million from the lease of a terminal facility to Bunge-SCF Grain. SCF Bunge Marine. SCF Bunge Marine provides towing services on the U.S. Inland Waterways, primarily the Mississippi River, Illinois River, Tennessee River and Ohio River. During the six months ended June 30, 2020, the Company earned revenues of $3.9 million from the time charter of eight inland river towboats to SCF Bunge Marine. Other Inland Services. The Company’s other Inland Services 50% or less owned company operates a fabrication facility. During the six months ended June 30, 2020, the Company and its partner each received a cash dividend of $0.1 million from this 50% or less owned company. VA&E. VA&E primarily focuses on the global origination, trading and merchandising of sugar, pairing producers and buyers and arranging for the transportation and logistics of the product. During the six months ended June 30, 2020, the Company provided a working capital advance of $1.2 million to VA&E and received repayments of $0.6 million of the working capital advance from VA&E.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2020
Long-term Debt and Lease Obligation [Abstract]
Long-Term Debt	5. LONG-TERM DEBT SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire SEACOR common stock, par value $0.01 per share (“Common Stock”), 3.0% Convertible Senior Notes, 2.5% Convertible Senior Notes and 3.25% Convertible Senior Notes (collectively the “Securities”) through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. As of June 30, 2020, the Company’s remaining repurchase authority for the Securities was $102.2 million. 3.0% Convertible Senior Notes. During the six months ended June 30, 2020, the Company purchased $15.6 million in principal amount of its 3.0% Convertible Senior Notes for total consideration of $15.4 million resulting in debt extinguishment losses of $0.3 million included in the accompanying condensed consolidated statements of income. The outstanding principal amount of these notes was $34.5 million as of June 30, 2020. 2.5% Convertible Senior Notes. During the six months ended June 30, 2020, the Company purchased $12.9 million in principal amount of its 2.5% Convertible Senior Notes for total consideration of $10.9 million resulting in debt extinguishment gains of $1.9 million included in the accompanying condensed consolidated statements of income. The outstanding principal amount of these notes was $51.6 million as of June 30, 2020. SEACOR Revolving Credit Facility. As of June 30, 2020, the Company had $125.0 million of remaining borrowing capacity under this facility. SEA-Vista 2019 Credit Facility. During the six months ended June 30, 2020, SEA-Vista made scheduled repayments of $5.0 million on its Term Loan. As of June 30, 2020, SEA-Vista had $100.0 million of remaining borrowing capacity under this facility. Other. During the six months ended June 30, 2020, the Company made scheduled repayments on other long-term debt of $0.5 million. Letters of Credit. As of June 30, 2020, the Company had outstanding letters of credit totaling $1.1 million with various expiration dates through 2027. Guarantees. The Company has guaranteed the payments of amounts owed under certain sale-leaseback transactions and multi-employer pension obligations on behalf of SEACOR Marine. As of June 30, 2020, these guarantees on behalf of SEACOR Marine totaled $14.6 million and decline as payments are made on the outstanding obligations. The Company earns a fee of 0.5% per annum on these guarantees. During the six months ended June 30, 2020, the fees earned by the Company for these guarantees were not material.

Operating Leases (Notes)

Operating Leases (Notes)	6 Months Ended
	Jun. 30, 2020
Operating Leases [Abstract]
Operating Leases	6. OPERATING LEASES As of June 30, 2020, the Company leased-in two U.S.-flag petroleum and chemical carriers, four U.S.-flag harbor tugs, one U.S.-flag offshore tug, four U.S.-flag PCTCs, 50 inland river dry-cargo barges, four inland river towboats, six inland river harbor boats and certain facilities and other equipment. The leases generally contain purchase and renewal options or rights of first refusal with respect to the sale or lease of the equipment. As of June 30, 2020, the lease terms of the U.S.-flag petroleum and chemical carriers, which are subject to subleases, have remaining durations of 27 and 74 months. The lease terms of the other vessels, facilities and equipment range in duration from 3 to 189 months. For the six months ended June 30, the components of lease expense were as follows (in thousands): 2020 2019 Operating lease expense $ 22,274 $ 21,239 Short-term lease expense (lease duration of twelve months or less at lease commencement) 9,354 12,143 Sublease income (17,394) (16,786) $ 14,234 $ 16,596 For the six months ended June 30, 2020, other information related to operating leases was as follows (in thousands except weighted average data): Operating cash outflows from operating leases $ 22,361 Right-of-use assets obtained in exchange for operating lease liabilities $ 6,142 Weighted average remaining lease term, in years 4.9 Weighted average discount rate 4.9 %

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	8. INCOME TAXES The following table reconciles the difference between the statutory federal income tax rate and the Company's effective income tax rate for the six months ended June 30, 2020: Statutory rate 21.0 % Income subject to tonnage tax (16.9) % U.S. federal income tax statutory changes (206.1) % Non-deductible expenses 4.6 % Foreign earnings not subject to U.S. income tax 3.1 % Foreign taxes not creditable against U.S. income tax 3.1 % Subpart F income 6.2 % State taxes 5.0 % Share award plans 3.1 % (176.9) % On March 27, 2020, the U.S. Congress passed and the President signed the Coronavirus Aid, Relief, and Economic Security Act (the "CARES Act") into law to address the economic fallout of the 2020 coronavirus pandemic. One provision of the CARES Act increases the tax deduction for net operating losses from 80% to 100% for 2018 through 2020, allows net operating losses generated in 2018 through 2020 to be carried back up to five years and increases the deductible interest expense limit from 30% to 50% of taxable EBITDA. As a result of these statutory changes, during the six months ended June 30, 2020, the Company determined it will be able to carry its 2019 net operating losses back to tax years when the statutory tax rate was 35% resulting in an income tax benefit of $12.7 million, which is included in income tax expense (benefit) in the accompanying condensed consolidated statements of income. As of June 30, 2020, $32.9 million of income tax receivables are included in other receivables in the accompanying condensed consolidated balance sheets.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure	9. DERIVATIVE INSTRUMENTS AND HEDGING STRATEGIES One of the Company’s 50% or less owned companies has subsidiaries with interest rate swap agreements designated as cash flow hedges, with an aggregate amortizing notional value of $48.0 million that mature in March 2028. These interest rate swaps call for the subsidiaries to pay a fixed rate of 1.74% on the aggregate amortizing notional value and receive a variable interest rate based on LIBOR. By entering into these interest rate swap agreements, the Company's 50% or less owned companies converted the variable LIBOR component of certain of its outstanding borrowings to a fixed interest rate. During the six months ended June 30, 2020, the Company recognized losses on the fair value of these contracts of $1.1 million which are included as a component of other comprehensive loss.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Disclosures	10. FAIR VALUE MEASUREMENTS The fair value of an asset or liability is the price that would be received to sell an asset or transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value and defines three levels of inputs that may be used to measure fair value. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, or inputs derived from observable market data. Level 3 inputs are unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities. As of June 30, 2020, the Company’s financial assets and liabilities that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents, restricted cash and restricted cash equivalents $ 129,508 $ — $ — Marketable securities (1) 6,418 — — ______________________ (1) Marketable security gains (losses), net include unrealized losses of $1.4 million and unrealized gains of $0.4 million for the three months ended June 30, 2020 and 2019, respectively, related to marketable security positions held by the Company as of June 30, 2020. Marketable security gains (losses), net include unrealized losses of $1.5 million and unrealized gains of $0.4 million for the six months ended June 30, 2020 and 2019, respectively, related to marketable security positions held by the Company as of June 30, 2020. As of June 30, 2020, the estimated fair values of the Company’s other financial assets and liabilities were as follows (in thousands): Estimated Fair Value Carrying Level 1 Level 2 Level 3 ASSETS Notes receivable from third parties (included in other receivables and other assets) $ 2,668 $ — $ 2,669 $ — Investments, at cost, in 50% or less owned companies (included in other assets) 4,201 see below LIABILITIES Long-term debt, including current portion (1) $ 284,517 $ — $ 266,192 $ — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 3.0% Convertible Senior Notes, 2.5% Convertible Senior Notes and 3.25% Convertible Senior Notes. The fair value of the Company’s long-term debt and notes receivable from third parties was estimated based upon quoted market prices or by using discounted cash flow analyses based on estimated current rates for similar types of arrangements. It was not practicable to estimate the fair value of certain of the Company’s investments, at cost, in 50% or less owned companies because of the lack of quoted market prices and the inability to estimate fair value without incurring excessive costs. Considerable judgment was required in developing certain of the estimates of fair value including the consideration of the recent COVID-19 pandemic that has caused significant volatility in U.S. and international markets, and accordingly, the estimates presented herein are not necessarily indicative of the amounts that the Company could realize in a current market exchange.

Equity Transactions (Notes)

Equity Transactions (Notes)	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
Stockholders' Equity Note Disclosure	11. EQUITY TRANSACTIONS SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire its Securities through open market purchases, privately negotiated transactions or otherwise, depending on market conditions (see Note 5). During the six months ended June 30, 2020, the Company acquired 41,600 shares of Common Stock for treasury for an aggregate purchase price of $1.4 million. As of June 30, 2020, the Company’s repurchase authority for the Securities was $102.2 million. During the six months ended June 30, 2020, the Company acquired 17,144 shares of Common Stock for treasury for an aggregate purchase price of $0.5 million from its employees to cover their tax withholding obligations related to the vesting of equity awards. These shares were purchased in accordance with the terms of the Company’s Share Incentive Plans and not pursuant to the repurchase authorizations for its Securities granted by SEACOR’s Board of Directors.

Noncontrolling Interests in Sub

Noncontrolling Interests in Subsidiaries	6 Months Ended
	Jun. 30, 2020
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries	12. NONCONTROLLING INTERESTS IN SUBSIDIARIES SEA-Vista owns and operates the Company’s fleet of U.S.-flag petroleum and chemical carriers used in the U.S. coastwise trade of crude oil, petroleum and specialty chemical products. On August 2, 2019, the Company acquired the Remaining SEA-Vista Interest. During the six months ended June 30, 2019, the net income of SEA-Vista was $15.9 million, of which $7.8 million was attributable to noncontrolling interests.

Multi-Employer and Defined Bene

Multi-Employer and Defined Benefit Pension Plans	6 Months Ended
	Jun. 30, 2020
Retirement Benefits [Abstract]
Multi-Employer and Defined Benefit Pension Plans	13. MULTI-EMPLOYER AND DEFINED BENEFIT PENSION PLANS During the six months ended June 30, 2020, the Company received notification from the AMOPP that the Company’s withdrawal liability as of September 30, 2019, the latest period for which an actuarial valuation is available, would have been $25.5 million. That liability may change in future years based on various factors, primarily employee census. As of June 30, 2020, the Company has no intention to withdraw from the AMOPP and no deficit amounts have been invoiced. Depending upon the results of the future actuarial valuations, it is possible that the AMOPP may experience future funding deficits, requiring the Company to recognize additional payroll related operating expenses in the periods invoices are received or contribution levels are increased.

Share Based Compensation

Share Based Compensation	6 Months Ended
	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Share Based Compensation	14. SHARE BASED COMPENSATION During the six months ended June 30, 2020, transactions in connection with the Company’s share based compensation plans were as follows: Director stock awards granted 1,125 Employee Stock Purchase Plan (“ESPP”) shares issued 29,917 Restricted stock awards granted 167,650 Stock Option Activities: Outstanding as of December 31, 2019 1,454,074 Granted 95,525 Exercised (23,525) Expired (3,274) Outstanding as of June 30, 2020 1,522,800 Shares available for future grants and ESPP purchases as of June 30, 2020 1,148,471 Share Incentive Plans. On June 2, 2020, SEACOR’s stockholders approved an amendment to the 2014 Share Incentive Plan, whereby the number of shares available under the plan was increased by 900,000.

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	15. COMMITMENTS AND CONTINGENCIES As of June 30, 2020, the Company's capital commitments by year of expected payment were as follows (in thousands): Remainder of 2020 2021 2022 Total Ocean Services $ 18,042 $ 30,892 $ 2,636 $ 51,570 Inland Services 5,525 427 — 5,952 Other 332 — — 332 $ 23,899 $ 31,319 $ 2,636 $ 57,854 Ocean Services' capital commitments included four U.S.-flag harbor tugs and an interest in two foreign-flag rail ferries. Inland Services' capital commitments included six inland river dry-cargo barges, one inland river towboat, other equipment, and vessel and terminal improvements. During 2012, the Company sold National Response Corporation (“NRC”), NRC Environmental Services Inc., SEACOR Response Ltd., and certain other subsidiaries to J.F. Lehman & Company, a private equity firm (the “SES Business Transaction”). On December 15, 2010, O’Brien’s Response Management L.L.C. (“ORM”) and NRC were named as defendants in several “master complaints” filed in the overall multi-district litigation relating to the Deepwater Horizon oil spill response and clean-up in the Gulf of Mexico (the “DWH Response”), which is currently pending in the U.S. District Court for the Eastern District of Louisiana (the “MDL”). The “B3” master complaint naming ORM and NRC asserted various claims on behalf of a putative class against multiple defendants concerning the clean-up activities generally and the use of dispersants specifically. Both prior to and following the filing of the aforementioned “B3” master complaint, individual civil actions naming the Company, ORM, and/or NRC alleging “B3” exposure-based injuries and/or damages were consolidated with the MDL and stayed pursuant to court order. On February 16, 2016, all but eleven “B3” claims against ORM and NRC were dismissed with prejudice (the “B3 Dismissal Order”). On August 2, 2016, the Court granted an omnibus motion for summary judgment as it concerns ORM and NRC in its entirety, dismissing the remaining eleven plaintiffs’ claims against ORM and NRC with prejudice (the “Remaining Eleven Plaintiffs’ Dismissal Order”). The deadline to appeal both of these orders has expired. The last remaining claim against the Company in connection with the “B3” master complaint was dismissed with prejudice, by an order of the Court granted on July 25, 2019. On February 18, 2011, Triton Asset Leasing GmbH, Transocean Holdings LLC, Transocean Offshore Deepwater Drilling Inc., and Transocean Deepwater Inc. (collectively “Transocean”) named ORM and NRC as third-party defendants in a Rule 14(c) Third-Party Complaint in Transocean’s own Limitation of Liability Act action, which is part of the overall MDL, tendering to ORM and NRC the claims in the “B3” master complaint that have already been asserted against ORM and NRC. Various contribution and indemnity cross-claims and counterclaims involving ORM and NRC were subsequently filed. The Company believes that the potential exposure, if any, resulting therefrom has been reduced as a result of the various developments in the MDL, including the B3 Dismissal Order and Remaining Eleven Plaintiffs’ Dismissal Order, and does not expect that these matters will have a material effect on its consolidated financial position, results of operations or cash flows. Separately, on March 2, 2012, the Court announced that BP Exploration and Production Inc. (“BPXP”) and BP America Production Company (“BP America,” and with BPXP, “BP”) and the Plaintiffs had reached an agreement on the terms of two proposed class action settlements that would resolve, among other things, Plaintiffs’ economic loss and property damage claims and clean-up related claims against BP. The Company, ORM, and NRC had no involvement in negotiating or agreeing to the terms of either settlement, nor are they parties or signatories thereto. The BP settlement pertaining to personal injury claims (the “Medical Settlement”) purported to resolve the “B3” claims asserted against BP and also established a right for class members to pursue individual claims against BP (but not ORM or NRC) for “later-manifested physical conditions,” defined in the Medical Settlement to be physical conditions that were “first diagnosed” after April 16, 2012 and which are claimed to have resulted from exposure during the DWH Response. This back-end litigation-option (“BELO”) provision of the Medical Settlement has specifically-delineated procedures and limitations, should any “B3” class member seek to invoke their BELO right. For example, there are limitations on the claims and defenses that can be asserted, as well as on the issues, elements, and proofs that may be litigated at any trial and the potential recovery for any Plaintiff. Notwithstanding that the Company, ORM, and NRC are listed on the Medical Settlement’s release as to claims asserted by Plaintiffs, the Medical Settlement still permits BP to seek indemnity from any party, to the extent BP has a valid indemnity right. The Medical Settlement was approved by the Court on January 11, 2013 and made effective on February 12, 2014. As of mid-July 2020, BP has tendered approximately 2,395 claims pursuant to the Medical Settlement’s BELO provision for indemnity to ORM and approximately 230 of such claims to NRC. Recently, approximately 760 of the claims that were tendered by BP to ORM and approximately 70 of the claims tendered to NRC have been dismissed with prejudice. ORM and NRC have rejected all of BP’s indemnity demands relating to the Medical Settlement’s BELO provision and on February 14, 2019 commenced a legal action against BPXP and BP America with respect to same. That action, captioned O’Brien’s Response Management, L.L.C. et al. v. BP Exploration & Production Inc. et al. , Case No. 2:19-CV-01418-CJB-JCW (E.D. La.) (the “Declaratory Judgment Action”), seeks declaratory relief that neither ORM nor NRC have any indemnity obligation to BP with respect to the exposure-based claims expressly contemplated by the Medical Settlement’s BELO provision, nor any contribution, in light of BP’s own actions and conduct over the past ten years (including its complete failure to even seek indemnity) and the resultant prejudice to ORM and NRC; that any indemnity or contribution rights BP may have once had with respect to these personal injury and exposure claims were extinguished once the Medical Settlement was approved by the MDL Court in 2013; and that ORM’s and NRC’s contractual and common law rights operate to bar any indemnity or contribution claims against them by BP. BP subsequently proceeded to begin tendering personal injury claims to ORM and NRC that are being pursued by plaintiffs who opted out of the Medical Settlement and who are thus proceeding with their “B3” claims in their ordinary course (as opposed to pursuant to the Medical Settlement’s BELO provision). ORM and NRC also rejected these demands, and amended the Declaratory Judgment Action to cover BP’s indemnity demands for the opt-out claims as well. BP asserted four amended counterclaims against ORM and NRC, as well as two claims against ORM’s insurer (Navigators). Those amended counterclaims are breach of contract against ORM for allegedly failing to indemnify BP or name BP as an additional insured on the Navigators policy, declaratory judgment that NRC must allegedly indemnify BP under certain circumstances, and unjust enrichment against ORM and NRC. ORM and NRC successfully moved to dismiss the unjust enrichment counterclaim. The parties also filed simultaneous motions for judgment on the pleadings. On May 4, 2020, the Court ruled in favor of ORM, NRC, and Navigators, and against BP, on all claims. BP appealed that ruling on the U.S. Court of Appeals for the Fifth Circuit. Briefings are expected to be complete by mid-November 2020, after which the Court may hold an oral argument or rule on the briefs alone. The timing of a ruling is within the Court's discretion. Generally, the Company, ORM, and NRC believe that BP’s indemnity demands with respect to any “B3” claims, including those involving Medical Settlement class members invoking BELO rights and those involving Medical Settlement opt-out Plaintiffs, are untimely and improper, and intend to vigorously defend their interests. Moreover, ORM has contractual indemnity coverage for the above-referenced claims through its separate agreements with sub-contractors that worked for ORM during the DWH Response and has attempted to preserve its rights in that regard while the Declaratory Judgment Action is pending. Overall, however, the Company believes that both of BP’s settlements have reduced the potential exposure in connection with the various cases relating to the DWH Response. The Company is unable to estimate the potential exposure, if any, resulting from these claims, but does not expect that they will have a material effect on its consolidated financial position, results of operations or cash flows. In the ordinary course of the Company’s business, it may agree to indemnify its counterparty to an agreement. If the indemnified party makes a successful claim for indemnification, the Company would be required to reimburse that party in accordance with the terms of the indemnification agreement. Indemnification agreements generally, but not always, are subject to threshold amounts, specified claim periods and other restrictions and limitations. In connection with the SES Business Transaction, the Company remains contingently liable for work performed in connection with the DWH Response. Pursuant to the agreement governing the sale, the Company’s potential liability to the purchaser may not exceed the consideration received by the Company for the SES Business Transaction. The Company is currently indemnified under contractual agreements with BP for the potential “B3” liabilities relating to the DWH Response; this indemnification is unrelated to, and thus not impacted by, the indemnification BP has demanded and discussed above. In the ordinary course of its business, the Company becomes involved in various other litigation matters including, among other things, claims by third parties for alleged property damages and personal injuries. Management has used estimates in determining the Company’s potential exposure to these matters and has recorded reserves in its financial statements related thereto where appropriate. It is possible that a change in the Company’s estimates of that exposure could occur, but the Company does not expect such changes in estimated costs would have a material effect on the Company’s consolidated financial position, results of operations or cash flows.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2020
Segment Reporting [Abstract]
Segment Information	16. SEGMENT INFORMATION Accounting standards require public business enterprises to report information about each of their operating business segments that exceed certain quantitative thresholds or meet certain other reporting requirements. Operating business segments have been defined as components of an enterprise about which separate financial information is available and is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company’s basis of measurement of segment profit or loss is as previously defined in the Company’s Annual report on Form 10-K for the year ended December 31, 2019. Accounting standards also require companies to disaggregate revenues from contracts with customers into categories to depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The following tables summarize the operating results, capital expenditures, assets and disaggregated revenues of the Company’s reportable segments. Ocean Inland Witt Other Corporate Total For the three months ended June 30, 2020 Operating Revenues: External customers 86,111 63,513 21,163 1,798 — 172,585 Intersegment — — 10 — (10) — 86,111 63,513 21,173 1,798 (10) 172,585 Costs and Expenses: Operating 57,827 53,915 13,104 1,342 (10) 126,178 Administrative and general 8,780 3,292 4,961 877 5,294 23,204 Depreciation and amortization 10,270 6,016 356 615 328 17,585 76,877 63,223 18,421 2,834 5,612 166,967 Gains on Asset Dispositions 113 8,085 — — — 8,198 Operating Income (Loss) 9,347 8,375 2,752 (1,036) (5,622) 13,816 Other Income (Expense): Foreign currency gains (losses), net 83 1,653 (9) — 16 1,743 Other, net (18) (3) — — 679 658 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (1,426) (701) 256 (1,111) — (2,982) Segment Profit (Loss) 7,986 9,324 2,999 (2,147) Other Income (Expense) not included in Segment Profit (Loss) (2,154) Less Equity Losses included in Segment Profit (Loss) 2,982 Income Before Taxes and Equity Losses 14,063 Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2020 Operating Revenues: External customers 192,226 124,824 43,634 4,197 — 364,881 Intersegment — — 45 — (45) — 192,226 124,824 43,679 4,197 (45) 364,881 Costs and Expenses: Operating 135,431 104,834 28,795 3,189 (43) 272,206 Administrative and general 19,524 6,780 12,640 2,001 11,280 52,225 Depreciation and amortization 20,552 12,228 615 1,234 685 35,314 175,507 123,842 42,050 6,424 11,922 359,745 Gains on Asset Dispositions, Net 122 8,400 — 60 — 8,582 Operating Income (Loss) 16,841 9,382 1,629 (2,167) (11,967) 13,718 Other Income (Expense): Foreign currency gains (losses), net 5 (2,825) 3 — (22) (2,839) Other, net 4 (3) 70 — 679 750 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (2,783) (4,077) 248 (1,163) — (7,775) Segment Profit (Loss) 14,067 2,477 1,950 (3,330) Other Income (Expense) not included in Segment Profit (Loss) (5,446) Less Equity Losses included in Segment Profit (Loss) 7,775 Income Before Taxes and Equity Losses 6,183 Capital Expenditures 5,518 3,806 — 1,720 1,373 12,417 As of June 30, 2020 Property and Equipment: Historical cost 937,756 456,479 1,144 11,530 32,336 1,439,245 Accumulated depreciation (400,416) (217,915) (1,049) (3,602) (24,418) (647,400) Net property and equipment 537,340 238,564 95 7,928 7,918 791,845 Operating Lease Right-of-Use Assets 101,538 27,767 2,222 — 101 131,628 Investments, at Equity, and Advances to 50% or Less Owned Companies 75,791 52,933 1,196 22,308 — 152,228 Inventories 1,146 2,074 143 305 — 3,668 Goodwill 1,852 2,268 28,506 — — 32,626 Intangible Assets 6,973 6,749 8,268 — — 21,990 Other current and long-term assets, excluding cash and near cash assets (1) 48,811 57,430 112,746 3,932 35,952 258,871 Segment Assets 773,451 387,785 153,176 34,473 Cash and near cash assets (1) 135,926 Total Assets 1,528,782 ______________________ (1) Cash and near cash assets includes cash, cash equivalents, restricted cash, restricted cash equivalents and marketable securities. Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2020 Revenues from Contracts with Customers: Voyage charters 27,199 — — — — 27,199 Contracts of affreightment 8,311 87,690 — — — 96,001 Tariff 38,475 — — — — 38,475 Unit freight 26,809 — — — — 26,809 Terminal operations — 11,141 — — — 11,141 Fleeting operations — 8,844 — — — 8,844 Logistics Services — 7,937 — — — 7,937 Time and material contracts — — 37,030 — — 37,030 Retainer contracts — — 5,365 — — 5,365 Product sales (1) — — — 3,169 — 3,169 Other 1,902 3,255 1,284 824 (45) 7,220 Lease Revenues: Time charter, bareboat charter and rental income 89,530 5,957 — 204 — 95,691 192,226 124,824 43,679 4,197 (45) 364,881 ______________________ (1) Cost of goods sold related to product sales was $2.4 million. Ocean Inland Witt Other Corporate Total For the three months ended June 30, 2019 Operating Revenues: External customers 109,681 61,455 23,745 2,142 — 197,023 Intersegment — — 8 — (8) — 109,681 61,455 23,753 2,142 (8) 197,023 Costs and Expenses: Operating 71,230 54,486 15,691 1,472 (8) 142,871 Administrative and general 9,423 3,133 6,831 837 6,490 26,714 Depreciation and amortization 10,230 5,699 209 493 378 17,009 90,883 63,318 22,731 2,802 6,860 186,594 Gains (Losses) on Asset Dispositions, Net 349 330 — (2) — 677 Operating Income (Loss) 19,147 (1,533) 1,022 (662) (6,868) 11,106 Other Income (Expense): Foreign currency gains (losses), net 1 (191) — — (1) (191) Other, net 28 — (2) — (1) 25 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 700 (618) (128) (266) — (312) Segment Profit (Loss) 19,876 (2,342) 892 (928) Other Income (Expense) not included in Segment Profit (Loss) 9,763 Less Equity Losses included in Segment Profit (Loss) 312 Income Before Taxes and Equity Losses 20,703 Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2019 Operating Revenues: External customers 218,953 127,057 56,590 3,947 — 406,547 Intersegment — — 106 — (106) — 218,953 127,057 56,696 3,947 (106) 406,547 Costs and Expenses: Operating 141,162 108,731 37,463 2,725 (99) 289,982 Administrative and general 19,621 6,489 13,233 1,676 12,441 53,460 Depreciation and amortization 20,567 11,424 415 982 757 34,145 181,350 126,644 51,111 5,383 13,099 377,587 Gains (Losses) on Asset Dispositions, Net 366 750 — (2) — 1,114 Operating Income (Loss) 37,969 1,163 5,585 (1,438) (13,205) 30,074 Other Income (Expense): Foreign currency gains (losses), net (46) 268 — — (8) 214 Other, net (623) — (5) — 9 (619) Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 811 (3,090) (195) (356) — (2,830) Segment Profit (Loss) 38,111 (1,659) 5,385 (1,794) Other Income (Expense) not included in Segment Profit (Loss) 8,825 Less Equity Losses included in Segment Profit (Loss) 2,830 Income Before Taxes and Equity Losses 38,494 Capital Expenditures 542 6,860 40 308 — 7,750 As of June 30, 2019 Property and Equipment: Historical cost 930,719 446,392 1,267 7,574 30,132 1,416,084 Accumulated depreciation (361,863) (205,792) (1,079) (1,472) (22,962) (593,168) Net property and equipment 568,856 240,600 188 6,102 7,170 822,916 Operating Lease Right-of-Use Assets 122,292 34,791 877 — 3,558 161,518 Investments, at Equity, and Advances to 50% or Less Owned Companies 77,644 56,504 280 21,217 — 155,645 Inventories 1,494 2,973 647 179 — 5,293 Goodwill 1,852 2,356 28,506 — — 32,714 Intangible Assets 8,301 8,244 6,228 — — 22,773 Other current and long-term assets, excluding cash and near cash assets (1) 56,598 49,737 91,993 3,630 17,319 219,277 Segment Assets 837,037 395,205 128,719 31,128 Cash and near cash assets (1) 183,254 Total Assets 1,603,390 ______________________ (1) Cash and near cash assets includes cash, cash equivalents, restricted cash, restricted cash equivalents, marketable securities and construction reserve funds. Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2019 Revenues from Contracts with Customers: Voyage charters 25,729 — — — — 25,729 Contracts of affreightment 10,647 94,795 — — — 105,442 Tariff 41,962 — — — — 41,962 Unit freight 32,312 — — — — 32,312 Terminal operations — 8,604 — — — 8,604 Fleeting operations — 7,967 — — — 7,967 Logistics Services — 8,113 — — — 8,113 Time and material contracts — — 50,586 — — 50,586 Retainer contracts — — 4,802 — — 4,802 Product sales (1) — — — 2,887 — 2,887 Other 1,922 2,279 1,308 584 (106) 5,987 Lease Revenues: Time charter, bareboat charter and rental income 106,381 5,299 — 476 — 112,156 218,953 127,057 56,696 3,947 (106) 406,547 ______________________ (1) Cost of goods sold related to product sales was $2.4 million.

Other Long-Term Financial Liabi

Other Long-Term Financial Liabilities (Notes)	6 Months Ended
	Jun. 30, 2020
Other Long-Term Financial Liabilities [Abstract]
Other Long-Term Financial Liabilities	7. OTHER LONG-TERM FINANCIAL LIABILITIES During the six months ended June 30, 2020, the Company sold and leased back three U.S.-flag harbor tugs for $33.7 million with leaseback terms ranging from 72-84 months (see Note 3). Each of the sale-leaseback agreements provides the Company an option to purchase the applicable U.S.-flag harbor tug for a fixed price one year prior to the expiration of the original lease term. As a result of the fixed price purchase options, in accordance with Topic 842 and Topic 606, the transactions resulted in "failed" sale-leasebacks as the purchasers do not obtain control of the assets. As a consequence, the Company has not derecognized the assets from its property and equipment and accumulated depreciation balances and will continue to depreciate the assets in accordance with its useful life and depreciation policies. The proceeds received from the sales are included in the accompanying condensed balance sheets as other long-term financial liabilities. As the Company makes rental payments, a portion of each payment will reduce the balance of the other long-term financial liabilities and a portion will be recorded as interest expense. During the six months ended June 30, the amounts recognized in the accompanying condensed consolidated statements of income related to these "failed" sale-leasebacks were as follows (in thousands): 2020 Depreciation and amortization $ 109 Interest expense 94 As of June 30, 2020, the future minimum lease payments under these agreements for the years ended December 31, were as follows (in thousands): Remainder of 2020 $ 1,284 2021 2,568 2022 2,568 2023 2,568 2024 2,568 Years subsequent to 2024 5,371 $ 16,927 As of June 30, 2020, depreciation expense to be recognized on these U.S.-flag harbor tugs through the end of the lease term for the years ended December 31, was as follows (in thousands): Remainder of 2020 $ 657 2021 1,313 2022 1,313 2023 1,313 2024 1,313 Years subsequent to 2024 2,735 $ 8,644

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Consolidation	Unless the context otherwise indicates, any reference in this Quarterly Report on Form 10-Q to the “Company” refers to SEACOR Holdings Inc. and its consolidated subsidiaries and any reference in this Quarterly Report on Form 10-Q to “SEACOR” refers to SEACOR Holdings Inc. without its consolidated subsidiaries. Capitalized terms used and not specifically defined herein have the same meaning given to those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2019. The condensed consolidated financial information for the three and six months ended June 30, 2020 and 2019 has been prepared by the Company and has not been audited by its independent registered certified public accounting firm. The condensed consolidated financial statements include the accounts of SEACOR Holdings Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments (consisting of normal recurring adjustments) have been made to fairly present the Company’s financial position as of June 30, 2020, its results of operations for the three and six months ended June 30, 2020 and 2019, its comprehensive income for the three and six months ended June 30, 2020 and 2019, its changes in equity for the three and six months ended June 30, 2020 and 2019, and its cash flows for the six months ended June 30, 2020 and 2019. Results of operations for the interim periods presented are not necessarily indicative of operating results for the full year or any future periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.
Recent Developments	Recent Developments. In March 2020, the World Health Organization declared the outbreak of a novel coronavirus ("COVID-19") as a pandemic, which continues to spread throughout the United States and the world. The spread of COVID-19 has caused significant volatility in U.S. and international markets and there is significant uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. and international economies. The Company's overall business, results of operations and financial condition have been adversely affected by the COVID-19 outbreak. The COVID-19 pandemic is a dynamic and continuously evolving phenomenon and the ultimate severity of the outbreak, and its effect on the Company's business in the future, is uncertain. If the pandemic worsens, additional restrictions are implemented or current restrictions are imposed for a longer period of time to contain the outbreak, the Company may experience a material adverse effect on its businesses, results of operations and financial condition, which could result in impairments in future periods.
Adoption of New Accounting Standards	Adoption of New Accounting Standards. On January 1, 2020, the Company adopted Financial Accounting Standards Board (“FASB”) Topic 326, Financial Instruments - Credit Losses (“Topic 326”), which replaces the current incurred loss impairment methodology for financial assets and other assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates. As part of the Company's assessment of the adequacy of its allowances for credit losses, it considered a number of factors including, but not limited to, customer credit ratings and payment history, bankruptcy filings, published or estimated credit default rates, age of receivables, expected loss rates and collateral exposures. The adoption of Topic 326 using a modified retrospective approach did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. On January 1, 2019, the Company adopted FASB Topic 842, Leases (“Topic 842”) using a modified prospective approach and implemented internal controls and systems to enable the preparation of financial information upon adoption. The Company elected the available practical expedients permitted under the guidance including the option to not separate lease and nonlease components in calculating the right-of-use assets and corresponding lease liabilities and to not apply the recognition requirements of Topic 842 to short-term leases (leases that have a duration of twelve months or less at lease inception). Generally, it was not possible for the Company to determine the interest rate implicit in each of its operating leases and therefore used its incremental borrowing rate in calculating operating lease right-of-use assets and lease liabilities. The Company assigned its leases to portfolios based on the remaining term at the time of adoption and applied a single rate to each portfolio of leases as the result was not materially different than using a specific discount rate for each individual lease. The Company included renewal options that were reasonably certain of being exercised in determining the lease term. Upon adoption, the Company recognized a cumulative-effect adjustment of $25.4 million, net of tax, to the opening balance of retained earnings primarily for previously deferred gains related to sale-leaseback transactions.
Revenue Recognition	Revenue Recognition. The Company earns revenues from contracts with customers and from lease contracts. Revenue from Contracts with Customers. Revenue is recognized when (or as) the Company transfers promised goods or services to its customers in amounts that reflect the consideration to which the Company expects to be entitled to in exchange for those goods or services, which occurs when (or as) the Company satisfies its contractual obligations and transfers control of the promised goods or services to its customers. Costs to obtain or fulfill a contract are expensed as incurred. Ocean Services' revenues from contracts with customers primarily arise from voyage charters, contracts of affreightment, tariff based port and infrastructure services, unit freight logistics services, and technical ship management agreements with vessel owners (see Note 16). Ocean Services transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Voyage charters are contracts to carry cargoes on a single voyage basis for a predetermined price, regardless of time to complete. Contracts of affreightment are contracts for cargoes that are committed on a multi-voyage basis for various periods of time, with minimum and maximum cargo tonnages specified over the period at a fixed or escalating rate per ton. Tariff based port and infrastructure services typically include operating harbor tugs alongside oceangoing vessels to escort them to their berth, assisting with the docking and undocking of these oceangoing vessels and escorting them back out to sea. They are contracted using prevailing port tariff terms on a per-use basis. In the unit freight logistics trade, transportation services typically include transporting shipping containers, rail cars, project cargoes, automobiles and U.S. military vehicles and are generally contracted on a per unit basis for the specified cargo and destination, typically in accordance with a publicly available tariff rate or based on a negotiated rate when moving larger volumes over an extended period. Managed services include technical ship and crew management agreements whereby Ocean Services provides technical ship and crew management services to third-party customers for a predetermined price over a specified period of time, typically a year or more. Inland Services' revenues from contracts with customers primarily arise from contracts of affreightment, terminal operations, fleeting operations and repair and maintenance services (see Note 16). Inland Services transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Contracts of affreightment are contracts whereby customers are charged an established rate per ton to transport cargo from point-to-point. Terminal operations includes tank farms and dry bulk and container handling facilities that are marketed under contractual rates and terms driven by throughput volume. Fleeting operations includes fleeting services whereby barges are held in fleeting areas for an agreed-upon day rate and shifting services whereby harbor boats are used to pick up and drop off barges to assist in assembling tows and to move barges to and from the dock for loading and unloading at predetermined per-shift fees. Other operations primarily include a machine shop specializing in towboat and barge cleaning, repair and maintenance services that are charged on an hourly or a fixed fee basis depending on the scope and nature of the work. Witt O’Brien’s revenues from contracts with customers primarily arise from time and material and retainer contracts (see Note 16). Witt O’Brien’s transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Time and material contracts primarily relate to emergency response, debris management or consulting services that Witt O’Brien’s performs for a predetermined fee. Retainer contracts, which are nearly all with vessel services operators and oil companies, are contracted based on agreed-upon rates. The Company’s Other business segment includes Cleancor, which primarily earns revenues from the sale of liquefied natural gas (see Note 16). Under these arrangements, control of the goods are transferred to the customer and performance obligations are satisfied at a point in time, and therefore revenue is recognized upon delivery while any related costs are expensed as incurred. Contract liabilities from contracts with customers arise when the Company has received consideration prior to performance and are included in other current liabilities in the accompanying consolidated balance sheets. The Company’s contract liability activity for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 794 $ 968 Previously deferred revenues recognized upon completion of performance obligations during the period (621) (700) Net contract liabilities arising during the period 5,790 5,443 Balance at end of period $ 5,963 $ 5,711
Lease Revenues	Lease Revenues. The Company’s lease revenues are primarily from time charters, bareboat charters and non-vessel rental agreements that are recognized ratably over the lease term as services are provided, typically on a per day basis. Under a time charter, the Company provides a vessel to a customer for a set term and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, the Company provides a vessel to a customer for a set term and the customer assumes responsibility for all operating expenses and risks of operation. Under a non-vessel rental agreement, the Company provides non-vessel property or equipment to a customer for a set term and the customer assumes responsibility for all operating expenses and risks of operation.
Property and Equipment	Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older assets that have already exceeded their useful life as set forth in the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of June 30, 2020, the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Petroleum and chemical carriers - U.S.-flag 25 Bulk carriers - U.S.-flag 25 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Short-sea container/RORO (1) vessels 20 Inland river dry-cargo and specialty barges 20 Inland river liquid tank barges 25 Inland river towboats and harbor boats 25 Terminal and fleeting facilities 20 ______________________ (1) Roll On/Roll Off. Equipment maintenance and repair costs including the costs of routine overhauls, dry-dockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. As of June 30, 2020, the Company had construction in progress of $16.4 million that primarily consisted of the construction of harbor tugs, an inland river towboat and other machinery and equipment and is included in historical cost in the accompanying condensed consolidated balance sheets. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. During the six months ended June 30, 2020, capitalized interest totaled $0.1 million.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying values of the assets are not recoverable, as determined by the estimated undiscounted cash flows, the estimated fair value of the assets or asset groups are compared to their current carrying value and impairment charges are recorded if the carrying value exceeds fair value. The Company performs its testing on an asset or asset group basis. The Company’s estimates of undiscounted cash flows are highly subjective and actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the six months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to long-lived assets held for use.
Impairment of 50% or Less Owned Companies	Impairment of 50% or Less Owned Companies. Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the carrying value of the investment. In its evaluation, the Company considers, among other items, recent and expected financial performance and returns, impairments recorded by the investee and the capital structure of the investee. When the Company determines the estimated fair value of an investment is below carrying value and the decline is other-than-temporary, the investment is written down to its estimated fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance, the severity and expected duration of declines in value and the available liquidity in the capital markets to support the continuing operations of the investee, among other factors. Although the Company believes its assumptions and estimates are reasonable, the investee’s actual performance compared with the estimates could produce different results and lead to additional impairment charges in future periods. During the six months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to its 50% or less owned companies.
Income Taxes	Income Taxes. During the six months ended June 30, 2020, the Company’s effective income tax rate of (176.9)% was lower than the statutory rate primarily due to a benefit from a statutory change to the U.S. federal income tax code and income subject to tonnage tax, partially offset by subpart F income and state taxes (see Note 8 ). During the six months ended June 30, 2019, the Company's effective income tax rate of 14.5% was lower than the statutory rate primarily due to tax not provided on income attributable to noncontrolling interests, foreign sourced income not subject to U.S. tax and income subject to tonnage tax, partially offset by foreign taxes not creditable against U.S. income tax.
Deferred Gains	Deferred Gains. The Company has sold certain equipment to its 50% or less owned companies, entered into vessel sale-leaseback transactions with finance companies and provided seller financing on sales of its equipment to third parties and its 50% or less owned companies. A portion of the gains realized from these transactions were deferred and recorded in deferred gains and other liabilities in the accompanying condensed consolidated balance sheets. Deferred gain activity related to these transactions for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 12,008 $ 43,664 Impact of adoption of accounting principle (1) — (29,207) Amortization of deferred gains included in gains on asset dispositions, net (661) (1,001) Balance at end of period $ 11,347 $ 13,456 ______________________ (1) On January 1, 2019, the Company adopted Topic 842 and reduced deferred gains associated with sale-leaseback transactions through a beginning period retained earnings adjustment.
Earnings Per Share	Earnings Per Share. Basic earnings per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding plus the effect of potentially dilutive securities through the application of the treasury stock and if-converted methods. Dilutive securities for this purpose assumes restricted stock grants have vested, common shares have been issued pursuant to the exercise of outstanding stock options and common shares have been issued pursuant to the conversion of all outstanding convertible notes. Computations of basic and diluted earnings per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended June 30, Six Months Ended June 30, Net Income attributable to SEACOR Average O/S Shares Per Share Net Income Attributable to SEACOR Average O/S Shares Per Share 2020 Basic Weighted Average Common Shares Outstanding $ 7,884 19,980,830 $ 0.39 $ 9,351 19,965,637 $ 0.47 Effect of Dilutive Securities: Options and Restricted Stock (1) — 2,109 — 20,945 Convertible Notes (2) 293 1,116,140 — — Diluted Weighted Average Common Shares Outstanding $ 8,177 21,099,079 $ 0.39 $ 9,351 19,986,582 $ 0.47 2019 Basic Weighted Average Common Shares Outstanding $ 14,553 18,288,879 $ 0.80 $ 22,286 18,260,876 $ 1.22 Effect of Dilutive Securities: Options and Restricted Stock (3) — 117,543 — 112,013 Convertible Notes (4) 318 1,227,101 637 1,227,101 Diluted Weighted Average Common Shares Outstanding $ 14,871 19,633,523 $ 0.76 $ 22,923 19,599,990 $ 1.17 ______________________ (1) For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,806,185 and 1,738,756, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,171,620 of common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 434,101 and 503,852, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes, and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 893,722 and 919,121, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (4) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 958,418 and 1,129,370, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.
New Accounting Pronouncements	New Accounting Pronouncements. On January 26, 2017, the FASB issued an amendment to the accounting standards that simplified wording and removed step two of the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform step two of the goodwill test. The new standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2020, with early adoption permitted for interim or annual goodwill impairment tests on testing dates after January 1, 2017. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On December 18, 2019, the FASB issued an amendment to the accounting standards that enhances and simplifies various aspects of the income tax accounting guidance including the elimination of certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows .

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Contract with Customer, Asset and Liability	The Company’s contract liability activity for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 794 $ 968 Previously deferred revenues recognized upon completion of performance obligations during the period (621) (700) Net contract liabilities arising during the period 5,790 5,443 Balance at end of period $ 5,963 $ 5,711
Property, Plant and Equipment	As of June 30, 2020, the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Petroleum and chemical carriers - U.S.-flag 25 Bulk carriers - U.S.-flag 25 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Short-sea container/RORO (1) vessels 20 Inland river dry-cargo and specialty barges 20 Inland river liquid tank barges 25 Inland river towboats and harbor boats 25 Terminal and fleeting facilities 20 ______________________ (1) Roll On/Roll Off.
Schedule of Deferred Gains	Deferred gain activity related to these transactions for the six months ended June 30 was as follows (in thousands): 2020 2019 Balance at beginning of period $ 12,008 $ 43,664 Impact of adoption of accounting principle (1) — (29,207) Amortization of deferred gains included in gains on asset dispositions, net (661) (1,001) Balance at end of period $ 11,347 $ 13,456 ______________________ (1) On January 1, 2019, the Company adopted Topic 842 and reduced deferred gains associated with sale-leaseback transactions through a beginning period retained earnings adjustment.
Schedule of Earnings Per Share	Computations of basic and diluted earnings per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended June 30, Six Months Ended June 30, Net Income attributable to SEACOR Average O/S Shares Per Share Net Income Attributable to SEACOR Average O/S Shares Per Share 2020 Basic Weighted Average Common Shares Outstanding $ 7,884 19,980,830 $ 0.39 $ 9,351 19,965,637 $ 0.47 Effect of Dilutive Securities: Options and Restricted Stock (1) — 2,109 — 20,945 Convertible Notes (2) 293 1,116,140 — — Diluted Weighted Average Common Shares Outstanding $ 8,177 21,099,079 $ 0.39 $ 9,351 19,986,582 $ 0.47 2019 Basic Weighted Average Common Shares Outstanding $ 14,553 18,288,879 $ 0.80 $ 22,286 18,260,876 $ 1.22 Effect of Dilutive Securities: Options and Restricted Stock (3) — 117,543 — 112,013 Convertible Notes (4) 318 1,227,101 637 1,227,101 Diluted Weighted Average Common Shares Outstanding $ 14,871 19,633,523 $ 0.76 $ 22,923 19,599,990 $ 1.17 ______________________ (1) For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,806,185 and 1,738,756, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 1,171,620 of common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the three and six months ended June 30, 2020, diluted earnings per common share of SEACOR excluded 434,101 and 503,852, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes, and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 893,722 and 919,121, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (4) For the three and six months ended June 30, 2019, diluted earnings per common share of SEACOR excluded 958,418 and 1,129,370, respectively, of common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 1,553,780 and 1,553,780, respectively, of common shares issuable pursuant to the Company’s 3.25% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.

Business Acquisitions (Tables)

Business Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2020
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	Purchase Price Allocation. The allocation of the purchase price for the Company’s acquisition for the six months ended June 30 was as follows (in thousands): 2020 Trade and other receivables $ 295 Other current assets 103 Property and Equipment 5 Intangible Assets 3,078 Accounts payable and other accrued liabilities (31) Other current liabilities (1) (2,113) Other Liabilities (1) (367) Purchase price (2) $ 970 ______________________ (1) Includes contingent consideration. (2) Purchase price is net of cash acquired totaling $0.8 million.

Operating Leases (Tables)

Operating Leases (Tables)	6 Months Ended
	Jun. 30, 2020
Operating Leases [Abstract]
Lease, Cost	For the six months ended June 30, the components of lease expense were as follows (in thousands): 2020 2019 Operating lease expense $ 22,274 $ 21,239 Short-term lease expense (lease duration of twelve months or less at lease commencement) 9,354 12,143 Sublease income (17,394) (16,786) $ 14,234 $ 16,596
Operating Leases Other Information	For the six months ended June 30, 2020, other information related to operating leases was as follows (in thousands except weighted average data): Operating cash outflows from operating leases $ 22,361 Right-of-use assets obtained in exchange for operating lease liabilities $ 6,142 Weighted average remaining lease term, in years 4.9 Weighted average discount rate 4.9 %

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The following table reconciles the difference between the statutory federal income tax rate and the Company's effective income tax rate for the six months ended June 30, 2020: Statutory rate 21.0 % Income subject to tonnage tax (16.9) % U.S. federal income tax statutory changes (206.1) % Non-deductible expenses 4.6 % Foreign earnings not subject to U.S. income tax 3.1 % Foreign taxes not creditable against U.S. income tax 3.1 % Subpart F income 6.2 % State taxes 5.0 % Share award plans 3.1 % (176.9) %

Fair Value Measurements Fair _2

Fair Value Measurements Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	As of June 30, 2020, the Company’s financial assets and liabilities that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents, restricted cash and restricted cash equivalents $ 129,508 $ — $ — Marketable securities (1) 6,418 — — ______________________
Estimated Fair Value of Other Financial Assets and Liabilities	As of June 30, 2020, the estimated fair values of the Company’s other financial assets and liabilities were as follows (in thousands): Estimated Fair Value Carrying Level 1 Level 2 Level 3 ASSETS Notes receivable from third parties (included in other receivables and other assets) $ 2,668 $ — $ 2,669 $ — Investments, at cost, in 50% or less owned companies (included in other assets) 4,201 see below LIABILITIES Long-term debt, including current portion (1) $ 284,517 $ — $ 266,192 $ — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 3.0% Convertible Senior Notes, 2.5% Convertible Senior Notes and 3.25% Convertible Senior Notes.

Share Based Compensation (Table

Share Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Share Based Compensation Plans	During the six months ended June 30, 2020, transactions in connection with the Company’s share based compensation plans were as follows: Director stock awards granted 1,125 Employee Stock Purchase Plan (“ESPP”) shares issued 29,917 Restricted stock awards granted 167,650 Stock Option Activities: Outstanding as of December 31, 2019 1,454,074 Granted 95,525 Exercised (23,525) Expired (3,274) Outstanding as of June 30, 2020 1,522,800 Shares available for future grants and ESPP purchases as of June 30, 2020 1,148,471

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure	As of June 30, 2020, the Company's capital commitments by year of expected payment were as follows (in thousands): Remainder of 2020 2021 2022 Total Ocean Services $ 18,042 $ 30,892 $ 2,636 $ 51,570 Inland Services 5,525 427 — 5,952 Other 332 — — 332 $ 23,899 $ 31,319 $ 2,636 $ 57,854

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2020
Segment Reporting [Abstract]
Operating Results, Capital Expenditures And Assets By Reporting Segment	The following tables summarize the operating results, capital expenditures, assets and disaggregated revenues of the Company’s reportable segments. Ocean Inland Witt Other Corporate Total For the three months ended June 30, 2020 Operating Revenues: External customers 86,111 63,513 21,163 1,798 — 172,585 Intersegment — — 10 — (10) — 86,111 63,513 21,173 1,798 (10) 172,585 Costs and Expenses: Operating 57,827 53,915 13,104 1,342 (10) 126,178 Administrative and general 8,780 3,292 4,961 877 5,294 23,204 Depreciation and amortization 10,270 6,016 356 615 328 17,585 76,877 63,223 18,421 2,834 5,612 166,967 Gains on Asset Dispositions 113 8,085 — — — 8,198 Operating Income (Loss) 9,347 8,375 2,752 (1,036) (5,622) 13,816 Other Income (Expense): Foreign currency gains (losses), net 83 1,653 (9) — 16 1,743 Other, net (18) (3) — — 679 658 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (1,426) (701) 256 (1,111) — (2,982) Segment Profit (Loss) 7,986 9,324 2,999 (2,147) Other Income (Expense) not included in Segment Profit (Loss) (2,154) Less Equity Losses included in Segment Profit (Loss) 2,982 Income Before Taxes and Equity Losses 14,063 Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2020 Operating Revenues: External customers 192,226 124,824 43,634 4,197 — 364,881 Intersegment — — 45 — (45) — 192,226 124,824 43,679 4,197 (45) 364,881 Costs and Expenses: Operating 135,431 104,834 28,795 3,189 (43) 272,206 Administrative and general 19,524 6,780 12,640 2,001 11,280 52,225 Depreciation and amortization 20,552 12,228 615 1,234 685 35,314 175,507 123,842 42,050 6,424 11,922 359,745 Gains on Asset Dispositions, Net 122 8,400 — 60 — 8,582 Operating Income (Loss) 16,841 9,382 1,629 (2,167) (11,967) 13,718 Other Income (Expense): Foreign currency gains (losses), net 5 (2,825) 3 — (22) (2,839) Other, net 4 (3) 70 — 679 750 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (2,783) (4,077) 248 (1,163) — (7,775) Segment Profit (Loss) 14,067 2,477 1,950 (3,330) Other Income (Expense) not included in Segment Profit (Loss) (5,446) Less Equity Losses included in Segment Profit (Loss) 7,775 Income Before Taxes and Equity Losses 6,183 Capital Expenditures 5,518 3,806 — 1,720 1,373 12,417 As of June 30, 2020 Property and Equipment: Historical cost 937,756 456,479 1,144 11,530 32,336 1,439,245 Accumulated depreciation (400,416) (217,915) (1,049) (3,602) (24,418) (647,400) Net property and equipment 537,340 238,564 95 7,928 7,918 791,845 Operating Lease Right-of-Use Assets 101,538 27,767 2,222 — 101 131,628 Investments, at Equity, and Advances to 50% or Less Owned Companies 75,791 52,933 1,196 22,308 — 152,228 Inventories 1,146 2,074 143 305 — 3,668 Goodwill 1,852 2,268 28,506 — — 32,626 Intangible Assets 6,973 6,749 8,268 — — 21,990 Other current and long-term assets, excluding cash and near cash assets (1) 48,811 57,430 112,746 3,932 35,952 258,871 Segment Assets 773,451 387,785 153,176 34,473 Cash and near cash assets (1) 135,926 Total Assets 1,528,782 ______________________ (1) Cash and near cash assets includes cash, cash equivalents, restricted cash, restricted cash equivalents and marketable securities. Ocean Inland Witt Other Corporate Total For the three months ended June 30, 2019 Operating Revenues: External customers 109,681 61,455 23,745 2,142 — 197,023 Intersegment — — 8 — (8) — 109,681 61,455 23,753 2,142 (8) 197,023 Costs and Expenses: Operating 71,230 54,486 15,691 1,472 (8) 142,871 Administrative and general 9,423 3,133 6,831 837 6,490 26,714 Depreciation and amortization 10,230 5,699 209 493 378 17,009 90,883 63,318 22,731 2,802 6,860 186,594 Gains (Losses) on Asset Dispositions, Net 349 330 — (2) — 677 Operating Income (Loss) 19,147 (1,533) 1,022 (662) (6,868) 11,106 Other Income (Expense): Foreign currency gains (losses), net 1 (191) — — (1) (191) Other, net 28 — (2) — (1) 25 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 700 (618) (128) (266) — (312) Segment Profit (Loss) 19,876 (2,342) 892 (928) Other Income (Expense) not included in Segment Profit (Loss) 9,763 Less Equity Losses included in Segment Profit (Loss) 312 Income Before Taxes and Equity Losses 20,703 Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2019 Operating Revenues: External customers 218,953 127,057 56,590 3,947 — 406,547 Intersegment — — 106 — (106) — 218,953 127,057 56,696 3,947 (106) 406,547 Costs and Expenses: Operating 141,162 108,731 37,463 2,725 (99) 289,982 Administrative and general 19,621 6,489 13,233 1,676 12,441 53,460 Depreciation and amortization 20,567 11,424 415 982 757 34,145 181,350 126,644 51,111 5,383 13,099 377,587 Gains (Losses) on Asset Dispositions, Net 366 750 — (2) — 1,114 Operating Income (Loss) 37,969 1,163 5,585 (1,438) (13,205) 30,074 Other Income (Expense): Foreign currency gains (losses), net (46) 268 — — (8) 214 Other, net (623) — (5) — 9 (619) Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 811 (3,090) (195) (356) — (2,830) Segment Profit (Loss) 38,111 (1,659) 5,385 (1,794) Other Income (Expense) not included in Segment Profit (Loss) 8,825 Less Equity Losses included in Segment Profit (Loss) 2,830 Income Before Taxes and Equity Losses 38,494 Capital Expenditures 542 6,860 40 308 — 7,750 As of June 30, 2019 Property and Equipment: Historical cost 930,719 446,392 1,267 7,574 30,132 1,416,084 Accumulated depreciation (361,863) (205,792) (1,079) (1,472) (22,962) (593,168) Net property and equipment 568,856 240,600 188 6,102 7,170 822,916 Operating Lease Right-of-Use Assets 122,292 34,791 877 — 3,558 161,518 Investments, at Equity, and Advances to 50% or Less Owned Companies 77,644 56,504 280 21,217 — 155,645 Inventories 1,494 2,973 647 179 — 5,293 Goodwill 1,852 2,356 28,506 — — 32,714 Intangible Assets 8,301 8,244 6,228 — — 22,773 Other current and long-term assets, excluding cash and near cash assets (1) 56,598 49,737 91,993 3,630 17,319 219,277 Segment Assets 837,037 395,205 128,719 31,128 Cash and near cash assets (1) 183,254 Total Assets 1,603,390 ______________________
Disaggregation of Revenue	Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2020 Revenues from Contracts with Customers: Voyage charters 27,199 — — — — 27,199 Contracts of affreightment 8,311 87,690 — — — 96,001 Tariff 38,475 — — — — 38,475 Unit freight 26,809 — — — — 26,809 Terminal operations — 11,141 — — — 11,141 Fleeting operations — 8,844 — — — 8,844 Logistics Services — 7,937 — — — 7,937 Time and material contracts — — 37,030 — — 37,030 Retainer contracts — — 5,365 — — 5,365 Product sales (1) — — — 3,169 — 3,169 Other 1,902 3,255 1,284 824 (45) 7,220 Lease Revenues: Time charter, bareboat charter and rental income 89,530 5,957 — 204 — 95,691 192,226 124,824 43,679 4,197 (45) 364,881 ______________________ (1) Cost of goods sold related to product sales was $2.4 million. Ocean Inland Witt Other Corporate Total For the six months ended June 30, 2019 Revenues from Contracts with Customers: Voyage charters 25,729 — — — — 25,729 Contracts of affreightment 10,647 94,795 — — — 105,442 Tariff 41,962 — — — — 41,962 Unit freight 32,312 — — — — 32,312 Terminal operations — 8,604 — — — 8,604 Fleeting operations — 7,967 — — — 7,967 Logistics Services — 8,113 — — — 8,113 Time and material contracts — — 50,586 — — 50,586 Retainer contracts — — 4,802 — — 4,802 Product sales (1) — — — 2,887 — 2,887 Other 1,922 2,279 1,308 584 (106) 5,987 Lease Revenues: Time charter, bareboat charter and rental income 106,381 5,299 — 476 — 112,156 218,953 127,057 56,696 3,947 (106) 406,547 ______________________ (1) Cost of goods sold related to product sales was $2.4 million.

Other Long-Term Financial Lia_2

Other Long-Term Financial Liabilities (Tables)	6 Months Ended
	Jun. 30, 2020
Other Long-Term Financial Liabilities [Abstract]
Impact of Failed Sale Leasebacks, Income Statement	During the six months ended June 30, the amounts recognized in the accompanying condensed consolidated statements of income related to these "failed" sale-leasebacks were as follows (in thousands): 2020 Depreciation and amortization $ 109 Interest expense 94
Schedule of Future Minimum Payments for Failed Sale Leasebacks	As of June 30, 2020, the future minimum lease payments under these agreements for the years ended December 31, were as follows (in thousands): Remainder of 2020 $ 1,284 2021 2,568 2022 2,568 2023 2,568 2024 2,568 Years subsequent to 2024 5,371 $ 16,927
Schedule of Future Depreciation Expense for Failed Sale Leasebacks	As of June 30, 2020, depreciation expense to be recognized on these U.S.-flag harbor tugs through the end of the lease term for the years ended December 31, was as follows (in thousands): Remainder of 2020 $ 657 2021 1,313 2022 1,313 2023 1,313 2024 1,313 Years subsequent to 2024 2,735 $ 8,644

Basis of Presentation and Acc_4

Basis of Presentation and Accounting Policies - Adoption of New Accounting Standards (Details) $ in Thousands	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle	$ 25,359
Accounting Standards Update 2016-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle	15,523
Accounting Standards Update 2016-02 | Sale-Leaseback | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle	$ 25,400

Basis of Presentation and Acc_5

Basis of Presentation and Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Change in Contract with Customer, Liability [Roll Forward]
Balance at beginning of period	$ 794	$ 968
Previously deferred revenues recognized upon completion of performance obligations during the period	(621)	(700)
Net contract liabilities arising during the period	5,790	5,443
Balance at end of period	$ 5,963	$ 5,711

Basis of Presentation and Acc_6

Basis of Presentation and Accounting Policies - Property and Equipment (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020USD ($)
Property, Plant and Equipment [Line Items]
Construction in progress	$ 16.4
Capitalized interest	$ 0.1
Petroleum and chemical carriers - U.S.-flag
Property, Plant and Equipment [Line Items]
Useful life	25 years
Bulk carriers - U.S.-flag
Property, Plant and Equipment [Line Items]
Useful life	25 years
Harbor and offshore tugs
Property, Plant and Equipment [Line Items]
Useful life	25 years
Ocean liquid tank barges
Property, Plant and Equipment [Line Items]
Useful life	25 years
Short-sea container/RORO vessels
Property, Plant and Equipment [Line Items]
Useful life	20 years
Inland river dry-cargo and specialty barges
Property, Plant and Equipment [Line Items]
Useful life	20 years
Inland river liquid tank barges
Property, Plant and Equipment [Line Items]
Useful life	25 years
Inland river towboats and harbor boats
Property, Plant and Equipment [Line Items]
Useful life	25 years
Terminal and fleeting facilities
Property, Plant and Equipment [Line Items]
Useful life	20 years

Basis of Presentation and Acc_7

Basis of Presentation and Accounting Policies - Income Taxes (Details)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Effective income tax rate reconciliation, percent	(176.90%)	14.50%

Basis of Presentation and Acc_8

Basis of Presentation and Accounting Policies - Deferred Gains (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jan. 01, 2019
Deferred Gains [Roll Forward]
Balance at beginning of period	$ 12,008	$ 43,664
Impact of adoption of accounting principle	0
Balance at end of period	11,347	13,456
Gain (Loss) on Disposition of Assets
Deferred Gains [Roll Forward]
Amortization of deferred gains included in gains on asset dispositions, net	$ (661)	$ (1,001)
Accounting Standards Update 2016-02 | Sale-Leaseback | Retained Earnings
Deferred Gains [Roll Forward]
Impact of adoption of accounting principle			$ (29,207)

Basis of Presentation and Acc_9

Basis of Presentation and Accounting Policies - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 7,884	$ 14,553	$ 9,351	$ 22,286
Effect of Dilutive Securities:
Options and Restricted Stock	0	0	0	0
Convertible Notes	293	318	0	637
Net Income, diluted	$ 8,177	$ 14,871	$ 9,351	$ 22,923
Weighted average number of shares outstanding, basic (in shares)	19,980,830	18,288,879	19,965,637	18,260,876
Effect of Dilutive Securities:
Options and Restricted Stock (in shares)	2,109	117,543	20,945	112,013
Convertible Notes (in shares)	1,116,140	1,227,101	0	1,227,101
Weighted average number of shares outstanding, diluted (in shares)	21,099,079	19,633,523	19,986,582	19,599,990
Basic earnings per common share (in dollars per share)	$ 0.39	$ 0.80	$ 0.47	$ 1.22
Diluted earnings per common share (in dollars per share)	$ 0.39	$ 0.76	$ 0.47	$ 1.17
2.5% Convertible Senior Notes
Effect of Dilutive Securities:
Debt instrument, interest rate, stated percentage	2.50%		2.50%
3.0% Convertible Senior Notes
Effect of Dilutive Securities:
Debt instrument, interest rate, stated percentage	3.00%		3.00%
3.25% Convertible Senior Notes
Effect of Dilutive Securities:
Debt instrument, interest rate, stated percentage	3.25%		3.25%
Stock Compensation Plan
Effect of Dilutive Securities:
Anti-dilutive securities (in shares)	1,806,185	893,722	1,738,756	919,121
Convertible Debt Securities | 2.5% Convertible Senior Notes
Effect of Dilutive Securities:
Anti-dilutive securities (in shares)			1,171,620
Convertible Debt Securities | 3.0% Convertible Senior Notes
Effect of Dilutive Securities:
Anti-dilutive securities (in shares)	434,101	958,418	503,852	1,129,370
Convertible Debt Securities | 3.25% Convertible Senior Notes
Effect of Dilutive Securities:
Anti-dilutive securities (in shares)	1,553,780	1,553,780	1,553,780	1,553,780

Business Acquisitions - Narrati

Business Acquisitions - Narrative (Details) $ in Thousands	Feb. 21, 2020USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 970
Navigate
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	3,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	1,000
Cash Acquired	800
Business Combination, Contingent Consideration, Liability	$ 1,800

Business Acquisitions - Purchas

Business Acquisitions - Purchase Price Allocation (Details) $ in Thousands	Feb. 21, 2020USD ($)
Business Combinations [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$ 295
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	103
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	3,078
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	2,113
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	367
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total	970
Navigate
Business Combinations [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total	1,000
Business Acquisition [Line Items]
Cash Acquired	$ 800

Equipment Acquisitions and Di_2

Equipment Acquisitions and Dispositions (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)equipmentvessel	Jun. 30, 2019USD ($)
Property, Plant and Equipment [Line Items]
Payments to acquire property, plant and equipment	$ 12,417	$ 7,750
Sales Price of Equipment	9,200
Gain (Loss) on Disposition of Property Plant Equipment	7,900
Proceeds from other long-term financial liabilities	33,662	$ 0
Gains on Asset Dispositions, Net
Property, Plant and Equipment [Line Items]
Amortization of Deferred Gains on Sale of Property	$ 700
Inland River Dry-Cargo Barges
Property, Plant and Equipment [Line Items]
Number of Equipment Disposed | vessel	39
U.S.-flag - Harbor Tugs
Property, Plant and Equipment [Line Items]
Equipment Subject to Failed Sale Leaseback, Number of Units | equipment	3
U.S.-flag - Harbor Tugs | Minimum
Property, Plant and Equipment [Line Items]
Failed Sale Leaseback Transaction, Lease Terms	72
U.S.-flag - Harbor Tugs | Maximum
Property, Plant and Equipment [Line Items]
Failed Sale Leaseback Transaction, Lease Terms	84

Investments, At Equity, And A_2

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)equipmentvessel
U.S.-flag Offshore Tug
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | equipment	1
Inland River Towboats
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | equipment	4
Trailer Bridge | U.S.-flag Offshore Tug
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | vessel	1
RF Vessel Holdings
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions	$ 2,000
RF Vessel Holdings | Foreign-flag Rail Ferries
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | vessel	2
Golfo de Mexico
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions	$ 500
Golfo de Mexico | Foreign-flag Rail Ferries
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | vessel	2
KSM | Foreign-flag Harbor Tugs
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | vessel	2
Number of equipment operated | vessel	4
KSM | Foreign-flag Ocean Liquid Tank Barge
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | vessel	1
KSM | Foreign-flag Specialty Vessels
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | vessel	2
SCF Bunge Marine | Inland River Towboats
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | vessel	8
Other Inland Services Equity Method Investments
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Distribution	$ 100
VA&E
Schedule Of Equity Method Investments [Line Items]
Payments for Advances and Loans to Affiliate	1,200
Proceeds from Collection of Advance to Affiliate	600
Time Charter | Trailer Bridge
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	2,000
Time Charter | SCF Bunge Marine
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	3,900
Bareboat Charter | KSM
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	800
Rental Income | Bunge SCF Grain
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	$ 400

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt Instrument [Line Items]
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Securities Repurchase Plan, Remaining Authorized Repurchase Amount	$ 102,200,000		$ 102,200,000
Debt extinguishment gains (losses), net	1,921,000	$ (503,000)	1,602,000	$ (1,296,000)
Repayments of long-term debt			31,828,000	$ 46,499,000
Letters of credit outstanding, amount	1,100,000		$ 1,100,000
Interest rate earned on guarantees			0.50%
SEACOR Marine Holdings Inc.
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 14,600,000		$ 14,600,000
Three Point Zero Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.00%		3.00%
Two Point Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.50%		2.50%
Three Point Two Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.25%		3.25%
Convertible Debt | Three Point Zero Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.00%		3.00%
Debt instrument, repurchased face amount	$ 15,600,000		$ 15,600,000
Repayments of Long-term Debt and Payments for Conversion Option in Convertible Debt			15,400,000
Debt extinguishment gains (losses), net			(300,000)
Long-term Debt, Gross	$ 34,500,000		$ 34,500,000
Convertible Debt | Two Point Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.50%		2.50%
Debt instrument, repurchased face amount	$ 12,900,000		$ 12,900,000
Repayments of Long-term Debt and Payments for Conversion Option in Convertible Debt			10,900,000
Debt extinguishment gains (losses), net			1,900,000
Long-term Debt, Gross	$ 51,600,000		$ 51,600,000
Convertible Debt | Three Point Two Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.25%		3.25%
Line of Credit | Revolving Credit Facility | SEACOR Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 125,000,000		$ 125,000,000
Line of Credit | Revolving Credit Facility | SEA-Vista 2019 Credit Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 100,000,000		100,000,000
Line of Credit | Secured Debt | SEA-Vista 2019 Credit Facility, Term Loan
Debt Instrument [Line Items]
Repayments of long-term debt			5,000,000
Notes Payable, Other Payables
Debt Instrument [Line Items]
Repayments of long-term debt			$ 500,000

Operating Leases (Details)

Operating Leases (Details)	Jun. 30, 2020	Jun. 30, 2020equipment
Petroleum and Chemical Carriers - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		2
Petroleum and Chemical Carriers - U.S.-flag | Minimum
Operating Leases [Line Items]
Sale Leaseback Transaction, Lease Terms	27
Petroleum and Chemical Carriers - U.S.-flag | Maximum
Operating Leases [Line Items]
Sale Leaseback Transaction, Lease Terms	74
U.S.-flag - Harbor Tugs
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		4
U.S.-flag Offshore Tug
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		1
Pure Car/Truck Carriers - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		4
Inland River Dry-Cargo Barges
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		50
Inland River Towboats
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		4
Inland River Harbor Boats
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units		6
Other Equipment | Minimum
Operating Leases [Line Items]
Lessee, Operating Lease, Term of Contract	3 months	3 months
Other Equipment | Maximum
Operating Leases [Line Items]
Lessee, Operating Lease, Term of Contract	189 months	189 months

Operating Leases Lease, Cost (D

Operating Leases Lease, Cost (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease expense	$ 22,274	$ 21,239
Short-term lease expense (lease duration of twelve months or less at lease commencement)	9,354	12,143
Sublease income	(17,394)	(16,786)
Lease cost	$ 14,234	$ 16,596

Operating Leases Operating Leas

Operating Leases Operating Leases Other Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)
Leases [Abstract]
Operating cash outflows from operating leases	$ 22,361
Right-of-use assets obtained in exchange for operating lease liabilities	$ 6,142
Weighted average remaining lease term, in years	4 years 10 months 24 days
Weighted average discount rate	4.90%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Statutory rate	21.00%
Income subject to tonnage tax	(16.90%)
U.S. federal income tax statutory changes	(206.10%)
Non-deductible expenses	4.60%
Foreign earnings not subject to U.S. income tax	3.10%
Foreign taxes not creditable against U.S. income tax	3.10%
Subpart F income	6.20%
State taxes	5.00%
Share award plans	3.10%
Effective income tax rate	(176.90%)	14.50%
Coronavirus Aid, Relief, and Economic Security Act, NOL Carryback, Income Tax Benefit	$ 12.7
Other Receivables
Income Taxes Receivable	$ 32.9

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative losses on cash flow hedges	$ (137)	$ 0	$ (1,055)	$ 0
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 48,000		$ 48,000
Derivative, Fixed Interest Rate	1.74%		1.74%
Derivative losses on cash flow hedges			$ 1,100

Fair Value Measurements Financi

Fair Value Measurements Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable security gains (losses), net	$ (1,400)	$ 400	$ (1,500)	$ 400
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	129,508		129,508
Marketable securities	6,418		6,418
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	0		0
Marketable securities	0		0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	0		0
Marketable securities	$ 0		$ 0

Fair Value Measurements Fair _3

Fair Value Measurements Fair Value Measurements (Estimated Fair Value of Other Financial Assets and Liabilities) (Details) $ in Thousands	Jun. 30, 2020USD ($)
3.0% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	3.00%
2.5% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	2.50%
3.25% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	3.25%
Convertible Debt | 3.0% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	3.00%
Convertible Debt | 2.5% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	2.50%
Convertible Debt | 3.25% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	3.25%
Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable from third parties (included in other receivables and other assets)	$ 2,668
Investments, at cost, in 50% or less owned companies (included in other assets)	4,201
Long-term debt, including current portion	284,517
Estimate of Fair Value Measurement | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable from third parties (included in other receivables and other assets)	0
Long-term debt, including current portion	0
Estimate of Fair Value Measurement | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable from third parties (included in other receivables and other assets)	2,669
Long-term debt, including current portion	266,192
Estimate of Fair Value Measurement | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable from third parties (included in other receivables and other assets)	0
Long-term debt, including current portion	$ 0

Stock Repurchases (Details)

Stock Repurchases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 165	$ 1,944	$ 516
Securities Repurchase Plan, Remaining Authorized Repurchase Amount		$ 102,200
Share Incentive Plans
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired		17,144
Treasury Stock, Value, Acquired, Cost Method		$ 500
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired		41,600
Treasury Stock, Value, Acquired, Cost Method		$ 1,400

Noncontrolling Interests in S_2

Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noncontrolling Interests in Subsidiaries [Line Items]
Net Income	$ 7,875	$ 17,001	$ 9,344	$ 30,069
Net income attributable to noncontrolling interest	$ (9)	$ 2,448	$ (7)	7,783
SEA-Vista | Ocean Services
Noncontrolling Interests in Subsidiaries [Line Items]
Net Income				15,900
Net income attributable to noncontrolling interest				$ 7,800

Multi-Employer and Defined Be_2

Multi-Employer and Defined Benefit Pension Plans (Details) $ in Millions	Sep. 30, 2019USD ($)
Withdrawal from Multiemployer Defined Benefit Plan | American Maritime Officers Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefit plans, withdrawal liability	$ 25.5

Share Based Compensation (Detai

Share Based Compensation (Details) - shares	Jun. 02, 2020	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Director stock awards granted (in shares)		1,125
Employee Stock Purchase Plan shares issued (in shares)		29,917
Restricted stock awards granted (in shares)		167,650
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options, outstanding as of December 31, 2019 (in shares)		1,454,074
Stock options, granted (in shares)		95,525
Stock options, exercised (in shares)		(23,525)
Share options, expired (in shares)		(3,274)
Stock options, outstanding as of June 30, 2020 (in shares)		1,522,800
Shares available for future grants and ESPP purchases as of June 30, 2020 (in shares)		1,148,471
Share Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	900,000

Commitments And Contingencies_2

Commitments And Contingencies (Details) $ in Thousands	Jul. 27, 2020claim	Oct. 16, 2019claim	Aug. 02, 2016claim	Feb. 16, 2016claim	Jun. 30, 2020USD ($)equipmentvessel
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of 2020					$ 23,899
Unrecorded unconditional purchase obligation, due within 2021					31,319
Unrecorded unconditional purchase obligation, due within 2022					2,636
Unrecorded unconditional purchase obligation					57,854
Deepwater Horizon Oil Spill Multi District Litigation
Loss Contingencies [Line Items]
Claims dismissed | claim			11	11
BELO/ORM | Subsequent Event
Loss Contingencies [Line Items]
Claims dismissed | claim	760
Claims filed | claim	2,395
BELO/NRC | Subsequent Event
Loss Contingencies [Line Items]
Claims dismissed | claim	70
Claims filed | claim	230
BP counter claims ORM and NRC
Loss Contingencies [Line Items]
Claims filed | claim		4
BP counterclaim ORM insurer
Loss Contingencies [Line Items]
Claims filed | claim		2
Ocean Services
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of 2020					18,042
Unrecorded unconditional purchase obligation, due within 2021					30,892
Unrecorded unconditional purchase obligation, due within 2022					2,636
Unrecorded unconditional purchase obligation					$ 51,570
Ocean Services | U.S.-flag - Harbor Tugs
Loss Contingencies [Line Items]
Number of equipment committed to purchase | equipment					4
Ocean Services | Foreign-flag Rail Ferries
Loss Contingencies [Line Items]
Number of equipment committed to purchase | vessel					2
Inland Services
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of 2020					$ 5,525
Unrecorded unconditional purchase obligation, due within 2021					427
Unrecorded unconditional purchase obligation, due within 2022					0
Unrecorded unconditional purchase obligation					$ 5,952
Inland Services | Inland River Dry-Cargo Barges
Loss Contingencies [Line Items]
Number of equipment committed to purchase | equipment					6
Inland Services | Inland River Towboat
Loss Contingencies [Line Items]
Number of equipment committed to purchase | vessel					1
Other Segment
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of 2020					$ 332
Unrecorded unconditional purchase obligation, due within 2021					0
Unrecorded unconditional purchase obligation, due within 2022					0
Unrecorded unconditional purchase obligation					$ 332

Segment Information - Operating

Segment Information - Operating Results, Capital Expenditures And Assets By Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating Revenues	$ 172,585	$ 197,023	$ 364,881	$ 406,547
Costs and Expenses:
Operating	126,178	142,871	272,206	289,982
Administrative and general	23,204	26,714	52,225	53,460
Depreciation and amortization	17,585	17,009	35,314	34,145
Total costs and expenses	166,967	186,594	359,745	377,587
Gains (Losses) on Asset Dispositions, Net	8,198	677	8,582	1,114
Operating Income (Loss)	13,816	11,106	13,718	30,074
Other Income (Expense):
Foreign currency gains (losses), net	1,743	(191)	(2,839)	214
Other, net	658	25	750	(619)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(2,982)	(312)	(7,775)	(2,830)
Income Before Income Tax Expense and Equity in Earnings (Losses) of 50% or Less Owned Companies	14,063	20,703	6,183	38,494
Capital Expenditures			12,417	7,750
Historical cost	1,439,245	1,416,084	1,439,245	1,416,084	$ 1,442,382
Accumulated depreciation	(647,400)	(593,168)	(647,400)	(593,168)	(624,024)
Net property and equipment	791,845	822,916	791,845	822,916	818,358
Operating Lease Right-of-Use Assets	131,628	161,518	131,628	161,518	144,539
Investments, at Equity, and Advances to 50% or Less Owned Companies	152,228	155,645	152,228	155,645	157,108
Inventories	3,668	5,293	3,668	5,293	5,255
Goodwill	32,626	32,714	32,626	32,714	32,701
Intangible Assets	21,990	22,773	21,990	22,773	20,996
Other current and long-term assets, excluding cash and near cash assets	258,871	219,277	258,871	219,277
Total Assets	1,528,782	1,603,390	1,528,782	1,603,390	$ 1,512,972
Ocean Services
Segment Reporting Information [Line Items]
Operating Revenues	86,111	109,681	192,226	218,953
Inland Services
Segment Reporting Information [Line Items]
Operating Revenues	63,513	61,455	124,824	127,057
Witt O'Brien's LLC
Segment Reporting Information [Line Items]
Operating Revenues	21,163	23,745	43,634	56,590
Other Segment
Segment Reporting Information [Line Items]
Operating Revenues	1,798	2,142	4,197	3,947
Intersegment Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(10)	(8)	(45)	(106)
Intersegment Eliminations | Ocean Services
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations | Inland Services
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations | Witt O'Brien's LLC
Segment Reporting Information [Line Items]
Operating Revenues	(10)	(8)	(45)	(106)
Intersegment Eliminations | Other Segment
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Operating Segments | Ocean Services
Segment Reporting Information [Line Items]
Operating Revenues	86,111	109,681	192,226	218,953
Costs and Expenses:
Operating	57,827	71,230	135,431	141,162
Administrative and general	8,780	9,423	19,524	19,621
Depreciation and amortization	10,270	10,230	20,552	20,567
Total costs and expenses	76,877	90,883	175,507	181,350
Gains (Losses) on Asset Dispositions, Net	113	349	122	366
Operating Income (Loss)	9,347	19,147	16,841	37,969
Other Income (Expense):
Foreign currency gains (losses), net	83	1	5	(46)
Other, net	(18)	28	4	(623)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(1,426)	700	(2,783)	811
Segment Profit (Loss)	7,986	19,876	14,067	38,111
Capital Expenditures			5,518	542
Historical cost	937,756	930,719	937,756	930,719
Accumulated depreciation	(400,416)	(361,863)	(400,416)	(361,863)
Net property and equipment	537,340	568,856	537,340	568,856
Operating Lease Right-of-Use Assets	101,538	122,292	101,538	122,292
Investments, at Equity, and Advances to 50% or Less Owned Companies	75,791	77,644	75,791	77,644
Inventories	1,146	1,494	1,146	1,494
Goodwill	1,852	1,852	1,852	1,852
Intangible Assets	6,973	8,301	6,973	8,301
Other current and long-term assets, excluding cash and near cash assets	48,811	56,598	48,811	56,598
Total Assets	773,451	837,037	773,451	837,037
Operating Segments | Inland Services
Segment Reporting Information [Line Items]
Operating Revenues	63,513	61,455	124,824	127,057
Costs and Expenses:
Operating	53,915	54,486	104,834	108,731
Administrative and general	3,292	3,133	6,780	6,489
Depreciation and amortization	6,016	5,699	12,228	11,424
Total costs and expenses	63,223	63,318	123,842	126,644
Gains (Losses) on Asset Dispositions, Net	8,085	330	8,400	750
Operating Income (Loss)	8,375	(1,533)	9,382	1,163
Other Income (Expense):
Foreign currency gains (losses), net	1,653	(191)	(2,825)	268
Other, net	(3)	0	(3)	0
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(701)	(618)	(4,077)	(3,090)
Segment Profit (Loss)	9,324	(2,342)	2,477	(1,659)
Capital Expenditures			3,806	6,860
Historical cost	456,479	446,392	456,479	446,392
Accumulated depreciation	(217,915)	(205,792)	(217,915)	(205,792)
Net property and equipment	238,564	240,600	238,564	240,600
Operating Lease Right-of-Use Assets	27,767	34,791	27,767	34,791
Investments, at Equity, and Advances to 50% or Less Owned Companies	52,933	56,504	52,933	56,504
Inventories	2,074	2,973	2,074	2,973
Goodwill	2,268	2,356	2,268	2,356
Intangible Assets	6,749	8,244	6,749	8,244
Other current and long-term assets, excluding cash and near cash assets	57,430	49,737	57,430	49,737
Total Assets	387,785	395,205	387,785	395,205
Operating Segments | Witt O'Brien's LLC
Segment Reporting Information [Line Items]
Operating Revenues	21,173	23,753	43,679	56,696
Costs and Expenses:
Operating	13,104	15,691	28,795	37,463
Administrative and general	4,961	6,831	12,640	13,233
Depreciation and amortization	356	209	615	415
Total costs and expenses	18,421	22,731	42,050	51,111
Gains (Losses) on Asset Dispositions, Net	0	0	0	0
Operating Income (Loss)	2,752	1,022	1,629	5,585
Other Income (Expense):
Foreign currency gains (losses), net	(9)	0	3	0
Other, net	0	(2)	70	(5)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	256	(128)	248	(195)
Segment Profit (Loss)	2,999	892	1,950	5,385
Capital Expenditures			0	40
Historical cost	1,144	1,267	1,144	1,267
Accumulated depreciation	(1,049)	(1,079)	(1,049)	(1,079)
Net property and equipment	95	188	95	188
Operating Lease Right-of-Use Assets	2,222	877	2,222	877
Investments, at Equity, and Advances to 50% or Less Owned Companies	1,196	280	1,196	280
Inventories	143	647	143	647
Goodwill	28,506	28,506	28,506	28,506
Intangible Assets	8,268	6,228	8,268	6,228
Other current and long-term assets, excluding cash and near cash assets	112,746	91,993	112,746	91,993
Total Assets	153,176	128,719	153,176	128,719
Operating Segments | Other Segment
Segment Reporting Information [Line Items]
Operating Revenues	1,798	2,142	4,197	3,947
Costs and Expenses:
Operating	1,342	1,472	3,189	2,725
Administrative and general	877	837	2,001	1,676
Depreciation and amortization	615	493	1,234	982
Total costs and expenses	2,834	2,802	6,424	5,383
Gains (Losses) on Asset Dispositions, Net	0	(2)	60	(2)
Operating Income (Loss)	(1,036)	(662)	(2,167)	(1,438)
Other Income (Expense):
Foreign currency gains (losses), net	0	0	0	0
Other, net	0	0	0	0
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(1,111)	(266)	(1,163)	(356)
Segment Profit (Loss)	(2,147)	(928)	(3,330)	(1,794)
Capital Expenditures			1,720	308
Historical cost	11,530	7,574	11,530	7,574
Accumulated depreciation	(3,602)	(1,472)	(3,602)	(1,472)
Net property and equipment	7,928	6,102	7,928	6,102
Operating Lease Right-of-Use Assets	0	0	0	0
Investments, at Equity, and Advances to 50% or Less Owned Companies	22,308	21,217	22,308	21,217
Inventories	305	179	305	179
Goodwill	0	0	0	0
Intangible Assets	0	0	0	0
Other current and long-term assets, excluding cash and near cash assets	3,932	3,630	3,932	3,630
Total Assets	34,473	31,128	34,473	31,128
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues			(45)	(106)
Costs and Expenses:
Operating	(10)	(8)	(43)	(99)
Administrative and general	5,294	6,490	11,280	12,441
Depreciation and amortization	328	378	685	757
Total costs and expenses	5,612	6,860	11,922	13,099
Gains (Losses) on Asset Dispositions, Net	0	0	0	0
Operating Income (Loss)	(5,622)	(6,868)	(11,967)	(13,205)
Other Income (Expense):
Foreign currency gains (losses), net	16	(1)	(22)	(8)
Other, net	679	(1)	679	9
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Capital Expenditures			1,373	0
Historical cost	32,336	30,132	32,336	30,132
Accumulated depreciation	(24,418)	(22,962)	(24,418)	(22,962)
Net property and equipment	7,918	7,170	7,918	7,170
Operating Lease Right-of-Use Assets	101	3,558	101	3,558
Investments, at Equity, and Advances to 50% or Less Owned Companies	0	0	0	0
Inventories	0	0	0	0
Goodwill	0	0	0	0
Intangible Assets	0	0	0	0
Other current and long-term assets, excluding cash and near cash assets	35,952	17,319	35,952	17,319
Segment Reconciling Items
Other Income (Expense):
Other, net	(2,154)	9,763	(5,446)	8,825
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,982	312	7,775	2,830
Cash and near cash assets	$ 135,926	$ 183,254	$ 135,926	$ 183,254

Segment Information - Revenues

Segment Information - Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Time charter, bareboat charter and rental income			$ 95,691	$ 112,156
Operating Revenues	$ 172,585	$ 197,023	364,881	406,547
Voyage Charters
Revenues from contracts with customers			27,199	25,729
Contracts of Affreightment
Revenues from contracts with customers			96,001	105,442
Tariff
Revenues from contracts with customers			38,475	41,962
Unit Freight
Revenues from contracts with customers			26,809	32,312
Terminal Operations
Revenues from contracts with customers			11,141	8,604
Fleeting Operations
Revenues from contracts with customers			8,844	7,967
Logistics Services
Revenues from contracts with customers			7,937	8,113
Time and Material Contracts
Revenues from contracts with customers			37,030	50,586
Retainer Contracts
Revenues from contracts with customers			5,365	4,802
Product Sales
Revenues from contracts with customers			3,169	2,887
Other
Revenues from contracts with customers			7,220	5,987
Ocean Services
Operating Revenues	86,111	109,681	192,226	218,953
Inland Services
Operating Revenues	63,513	61,455	124,824	127,057
Witt O'Brien's LLC
Operating Revenues	21,163	23,745	43,634	56,590
Other Segment
Operating Revenues	1,798	2,142	4,197	3,947
Operating Segments | Ocean Services
Time charter, bareboat charter and rental income			89,530	106,381
Operating Revenues	86,111	109,681	192,226	218,953
Operating Segments | Ocean Services | Voyage Charters
Revenues from contracts with customers			27,199	25,729
Operating Segments | Ocean Services | Contracts of Affreightment
Revenues from contracts with customers			8,311	10,647
Operating Segments | Ocean Services | Tariff
Revenues from contracts with customers			38,475	41,962
Operating Segments | Ocean Services | Unit Freight
Revenues from contracts with customers			26,809	32,312
Operating Segments | Ocean Services | Terminal Operations
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Fleeting Operations
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Logistics Services
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Time and Material Contracts
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Retainer Contracts
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Product Sales
Revenues from contracts with customers			0	0
Operating Segments | Ocean Services | Other
Revenues from contracts with customers			1,902	1,922
Operating Segments | Inland Services
Time charter, bareboat charter and rental income			5,957	5,299
Operating Revenues	63,513	61,455	124,824	127,057
Operating Segments | Inland Services | Voyage Charters
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Contracts of Affreightment
Revenues from contracts with customers			87,690	94,795
Operating Segments | Inland Services | Tariff
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Unit Freight
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Terminal Operations
Revenues from contracts with customers			11,141	8,604
Operating Segments | Inland Services | Fleeting Operations
Revenues from contracts with customers			8,844	7,967
Operating Segments | Inland Services | Logistics Services
Revenues from contracts with customers			7,937	8,113
Operating Segments | Inland Services | Time and Material Contracts
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Retainer Contracts
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Product Sales
Revenues from contracts with customers			0	0
Operating Segments | Inland Services | Other
Revenues from contracts with customers			3,255	2,279
Operating Segments | Witt O'Brien's LLC
Time charter, bareboat charter and rental income			0	0
Operating Revenues	21,173	23,753	43,679	56,696
Operating Segments | Witt O'Brien's LLC | Voyage Charters
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Contracts of Affreightment
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Tariff
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Unit Freight
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Terminal Operations
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Fleeting Operations
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Logistics Services
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Time and Material Contracts
Revenues from contracts with customers			37,030	50,586
Operating Segments | Witt O'Brien's LLC | Retainer Contracts
Revenues from contracts with customers			5,365	4,802
Operating Segments | Witt O'Brien's LLC | Product Sales
Revenues from contracts with customers			0	0
Operating Segments | Witt O'Brien's LLC | Other
Revenues from contracts with customers			1,284	1,308
Operating Segments | Other Segment
Time charter, bareboat charter and rental income			204	476
Operating Revenues	$ 1,798	$ 2,142	4,197	3,947
Operating Segments | Other Segment | Voyage Charters
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Contracts of Affreightment
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Tariff
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Unit Freight
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Terminal Operations
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Fleeting Operations
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Logistics Services
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Time and Material Contracts
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Retainer Contracts
Revenues from contracts with customers			0	0
Operating Segments | Other Segment | Product Sales
Revenues from contracts with customers			3,169	2,887
Cost of goods sold			2,400	2,400
Operating Segments | Other Segment | Other
Revenues from contracts with customers			824	584
Corporate And Eliminations
Time charter, bareboat charter and rental income			0	0
Operating Revenues			(45)	(106)
Corporate And Eliminations | Voyage Charters
Revenues from contracts with customers			0	0
Corporate And Eliminations | Contracts of Affreightment
Revenues from contracts with customers			0	0
Corporate And Eliminations | Tariff
Revenues from contracts with customers			0	0
Corporate And Eliminations | Unit Freight
Revenues from contracts with customers			0	0
Corporate And Eliminations | Terminal Operations
Revenues from contracts with customers			0	0
Corporate And Eliminations | Fleeting Operations
Revenues from contracts with customers			0	0
Corporate And Eliminations | Logistics Services
Revenues from contracts with customers			0	0
Corporate And Eliminations | Time and Material Contracts
Revenues from contracts with customers			0	0
Corporate And Eliminations | Retainer Contracts
Revenues from contracts with customers			0	0
Corporate And Eliminations | Product Sales
Revenues from contracts with customers			0	0
Corporate And Eliminations | Other
Revenues from contracts with customers			$ (45)	$ (106)

Other Long-Term Financial Lia_3

Other Long-Term Financial Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)equipment	Jun. 30, 2019USD ($)
Other Long-Term Financial Liabilities [Line Items]
Proceeds from other long-term financial liabilities | $	$ 33,662	$ 0
U.S.-flag - Harbor Tugs
Other Long-Term Financial Liabilities [Line Items]
Equipment Subject to Failed Sale Leaseback, Number of Units | equipment	3
U.S.-flag - Harbor Tugs | Minimum
Other Long-Term Financial Liabilities [Line Items]
Failed Sale Leaseback Transaction, Lease Terms	72
U.S.-flag - Harbor Tugs | Maximum
Other Long-Term Financial Liabilities [Line Items]
Failed Sale Leaseback Transaction, Lease Terms	84

Other Long-Term Financial Lia_4

Other Long-Term Financial Liabilities Impact of Failed Sale Leasebacks, Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Long-Term Financial Liabilities [Line Items]
Depreciation and amortization	$ 17,585	$ 17,009	$ 35,314	$ 34,145
Interest expense	$ 4,179	$ 4,903	8,649	$ 10,016
Failed Sale Leasebacks [Member]
Other Long-Term Financial Liabilities [Line Items]
Depreciation and amortization			109
Interest expense			$ 94

Other Long-Term Financial Lia_5

Other Long-Term Financial Liabilities Schedule of Future Minimum Payments for Failed Sale Leasebacks (Details) $ in Thousands	Jun. 30, 2020USD ($)
Other Long-Term Financial Liabilities [Abstract]
Future Minimum Payments for Failed Sale Leasebacks, Due in Remainder of 2020	$ 1,284
Future Minimum Payments for Failed Sale Leasebacks, 2021	2,568
Future Minimum Payments for Failed Sale Leasebacks, 2022	2,568
Future Minimum Payments for Failed Sale Leasebacks, 2023	2,568
Future Minimum Payments for Failed Sale Leasebacks, 2024	2,568
Future Minimum Payments for Failed Sale Leasebacks, Years subsequent to 2024	5,371
Future Minimum Payments for Failed Sale Leasebacks	$ 16,927

Other Long-Term Financial Lia_6

Other Long-Term Financial Liabilities Schedule of Future Depreciation Expense for Failed Sale Leasebacks (Details) $ in Thousands	Jun. 30, 2020USD ($)
Other Long-Term Financial Liabilities [Abstract]
Depreciation Expense to be Recognized for Failed Sale Leasebacks, Remainder of 2020	$ 657
Depreciation Expense to be Recognized for Failed Sale Leasebacks, 2021	1,313
Depreciation Expense to be Recognized for Failed Sale Leasebacks, 2022	1,313
Depreciation Expense to be Recognized for Failed Sale Leasebacks, 2023	1,313
Depreciation Expense to be Recognized for Failed Sale Leasebacks, 2024	1,313
Depreciation Expense to be Recognized for Failed Sale Leasebacks, Years subsequent to 2024	2,735
Depreciation Expense to be Recognized for Failed Sale Leasebacks	$ 8,644

Uncategorized Items - ckh-20200

Label	Element	Value
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 879,201,000
Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	390,000
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1,596,642,000
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	490,332,000
AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(914,000)
Treasury Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(1,366,773,000)
Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	159,524,000
Accounting Standards Update 2016-02 [Member] | Noncontrolling Interest [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 9,836,000