Seacor (CKH) 10-Q 24 Jul 19 2019 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 19, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
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		18,549,972
Entity Registrant Name	SEACOR HOLDINGS INC /NEW/
Entity Central Index Key	0000859598
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 138,757	$ 144,221
Restricted cash and restricted cash equivalents	1,221	2,991
Marketable securities	39,368	30,316
Receivables:
Trade, net of allowance for doubtful accounts of $3,023 and $3,481 in 2019 and 2018, respectively	164,964	171,828
Other	38,297	38,881
Inventories	5,293	4,530
Prepaid expenses and other	5,640	5,382
Total current assets	393,540	398,149
Property and Equipment:
Historical cost	1,416,084	1,407,329
Accumulated depreciation	(593,168)	(560,819)
Net property and equipment	822,916	846,510
Operating Lease Right-of-Use Assets	161,518	0
Investments, at Equity, and Advances to 50% or Less Owned Companies	155,645	156,886
Construction Reserve Funds	3,908	3,908
Goodwill	32,714	32,708
Intangible Assets, Net	22,773	24,551
Other Assets	10,376	8,312
Total Assets	1,603,390	1,471,024
Current Liabilities:
Current portion of long-term debt	78,301	8,497
Current portion of long-term operating lease liabilities	36,171	0
Accounts payable and accrued expenses	35,132	59,607
Other current liabilities	64,796	55,659
Total current liabilities	214,400	123,763
Long-Term Debt	234,445	346,128
Long-Term Operating Lease Liabilities	125,182	0
Deferred Income Taxes	99,938	94,420
Deferred Gains and Other Liabilities	20,768	52,871
Total liabilities	694,733	617,182
SEACOR Holdings Inc. stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding	0	0
Common stock, $.01 par value, 60,000,000 shares authorized; 39,210,865 and 39,001,924 shares issued in 2019 and 2018, respectively	392	390
Additional paid-in capital	1,600,838	1,596,642
Retained earnings	512,618	474,809
Shares held in treasury of 20,661,083 and 20,671,627 in 2019 and 2018, respectively, at cost	(1,366,432)	(1,366,773)
Accumulated other comprehensive loss, net of tax	(995)	(914)
Stockholders' equity attributable to parent, total	746,421	704,154
Noncontrolling interests in subsidiaries	162,236	149,688
Total equity	908,657	853,842
Liabilities and stockholders' equity, total	$ 1,603,390	$ 1,471,024

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Trade receivables, allowance for doubtful accounts	$ 3,023	$ 3,481
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	39,210,865	39,001,924
Treasury stock, shares held in treasury (in shares)	20,661,083	20,671,627
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Operating Revenues	$ 197,023	$ 216,831	$ 406,547	$ 401,655
Costs and Expenses:
Operating	142,871	162,168	289,982	293,945
Administrative and general	26,714	24,311	53,460	50,106
Depreciation and amortization	17,009	18,844	34,145	38,453
Total costs and expenses	186,594	205,323	377,587	382,504
Gains on Asset Dispositions	677	506	1,114	7,551
Operating Income	11,106	12,014	30,074	26,702
Other Income (Expense):
Interest income	1,885	2,179	3,785	4,035
Interest expense	(4,903)	(8,604)	(10,016)	(17,167)
Debt extinguishment losses, net	(503)	(5,407)	(1,296)	(5,449)
Marketable security gains (losses), net	13,284	782	16,352	(3,016)
Foreign currency gains (losses), net	(191)	(1,346)	214	344
Other, net	25	54,311	(619)	54,594
Total Other Nonoperating Expense	9,597	41,915	8,420	33,341
Income Before Income Tax Expense and Equity in Earnings (Losses) of 50% or Less Owned Companies	20,703	53,929	38,494	60,043
Income Tax Expense	3,390	9,853	5,595	9,572
Income Before Equity in Earnings (Losses) of 50% or Less Owned Companies	17,313	44,076	32,899	50,471
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(312)	1,931	(2,830)	1,094
Net Income	17,001	46,007	30,069	51,565
Net Income Attributable to Noncontrolling Interests in Subsidiaries	2,448	881	7,783	5,798
Net Income Attributable to SEACOR Holdings Inc.	$ 14,553	$ 45,126	$ 22,286	$ 45,767
Basic Earnings Per Common Share of SEACOR Holdings Inc. (in dollars per share)	$ 0.80	$ 2.50	$ 1.22	$ 2.54
Diluted Earnings Per Common Share of SEACOR Holdings Inc. (in dollars per share)	$ 0.76	$ 2.14	$ 1.17	$ 2.32
Weighted Average Common Shares Outstanding:
Basic (in shares)	18,288,879	18,076,944	18,260,876	18,023,752
Diluted (in shares)	19,633,523	22,587,543	19,599,990	22,462,300

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 17,001	$ 46,007	$ 30,069	$ 51,565
Other Comprehensive Income (Loss):
Foreign currency translation gains (losses)	(92)	(509)	(13)	135
Income tax benefit (expense)	0	28	(68)	25
Other comprehensive income (loss), net of tax	(92)	(481)	(81)	160
Comprehensive Income	16,909	45,526	29,988	51,725
Comprehensive Income attributable to Noncontrolling Interests in Subsidiaries	2,448	881	7,783	5,798
Comprehensive Income attributable to SEACOR Holdings Inc.	$ 14,461	$ 44,645	$ 22,205	$ 45,927

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 Income (Loss)	Noncontrolling Interests In Subsidiaries
Total equity, beginning balance at Dec. 31, 2017	$ 753,361	$ 387	$ 1,573,013	$ 419,128	$ (1,368,300)	$ (545)	$ 129,678
Issuance of common stock:
Employee Stock Purchase Plan	867				867
Exercise of stock options	4,713	1	4,712
Director stock awards	73		73
Restricted stock	0	1	(1)
Net issuance of conversion option on exchange of convertible debt, net of tax	12,735		12,735
Purchase of conversion option in convertible debt, net of tax	(5)		(5)
Amortization of share awards	1,848		1,848
Acquisition of a subsidiary with noncontrolling interests	96						96
Distributions to noncontrolling interests	(5,110)						(5,110)
Net income	51,565			45,767			5,798
Other comprehensive income (loss)	160					160
Total equity, ending balance at Jun. 30, 2018	817,836	389	1,592,375	462,428	(1,367,433)	(385)	130,462
Total equity, beginning balance at Mar. 31, 2018	761,474	389	1,576,657	417,302	(1,367,433)	96	134,463
Issuance of common stock:
Exercise of stock options	1,985		1,985
Director stock awards	53		53
Net issuance of conversion option on exchange of convertible debt, net of tax	12,735		12,735
Purchase of conversion option in convertible debt, net of tax	(5)		(5)
Amortization of share awards	950		950
Acquisition of a subsidiary with noncontrolling interests	96						96
Distributions to noncontrolling interests	(4,978)						(4,978)
Net income	46,007			45,126			881
Other comprehensive income (loss)	(481)					(481)
Total equity, ending balance at Jun. 30, 2018	817,836	389	1,592,375	462,428	(1,367,433)	(385)	130,462
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	30,069			22,286			7,783
Other comprehensive income (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	17,001			14,553			2,448
Other comprehensive income (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

Condensed Consolidated Statem_4

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Net Cash Provided by Operating Activities	$ 51,508	$ 13,115
Cash Flows from Investing Activities:
Purchases of property and equipment	(7,750)	(31,632)
Proceeds from disposition of property and equipment	118	15,881
Investments in and advances to 50% or less owned companies	(3,215)	(8,320)
Return of investments and advances from 50% or less owned companies	3,677	7,776
Proceeds on sale of 50% or less owned companies	0	78,015
Payments received on third-party leases and notes receivable, net	260	300
Withdrawals from construction reserve funds	0	35,197
Business acquisitions, net of cash acquired	0	310
Net cash provided by (used in) investing activities	(6,910)	97,527
Cash Flows from Financing Activities:
Payments on long-term debt	(46,499)	(30,514)
Payments for long-term debt issue costs	(2,197)	(2,495)
Purchase of Conversion Option In Convertible Debt	130	5
Common stock acquired for treasury	(516)	0
Proceeds from share award plans	2,591	5,580
Distributions to noncontrolling interests	(5,071)	(5,110)
Net cash used in financing activities	(51,822)	(32,544)
Effects of Exchange Rate Changes on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(10)	52
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(7,234)	78,150
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	147,212	242,228
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	139,978	320,378
Restricted Cash and Restricted Cash Equivalents, End of Period	1,221	2,989
Cash and Cash Equivalents, End of Period	$ 138,757	$ 317,389

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	6 Months Ended
	Jun. 30, 2019
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 those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2018 . The condensed consolidated financial information for the three and six months ended June 30, 2019 and 2018 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, 2019 , its results of operations for the three and six months ended June 30, 2019 and 2018 , its comprehensive income for the three and six months ended June 30, 2019 and 2018 , its changes in equity for the three and six months ended June 30, 2019 and 2018 , and its cash flows for the six months ended June 30, 2019 and 2018 . 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, 2018 . Adoption of New Accounting Standards. On January 1, 2019, the Company adopted Financial Accounting Standards Board (“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 recorded operating lease right-of-use assets and lease liabilities of $174.6 million for certain of its equipment, offices, real property and land leases (see Note 5). In addition, 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. On January 1, 2018, the Company adopted ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory , which eliminates the deferral of the tax effects of intercompany asset sales other than inventory until the transferred assets are sold to a third party or recovered through use. As a result of the adoption of the standard, the deferred tax charges previously recognized from those sales resulted in a decrease in deferred tax assets and a cumulative adjustment to retained earnings of $2.5 million in the consolidated balance sheets and statements of changes in equity as of January 1, 2018. Revenue Recognition. 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. Revenue from Contracts with Customers. Ocean Services primarily earns revenues 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 13). 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 management agreements whereby Ocean Services provides technical ship management services to third-party customers for a predetermined price over a specified period of time, typically a year or more. Inland Services primarily earns revenues from contracts of affreightment, terminal operations, fleeting operations and repair and maintenance services (see Note 13). 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 primarily earns revenues from time and material and retainer contracts (see Note 13). 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 Energy Solutions LLC and its subsidiaries (collectively “Cleancor”), which primarily earns revenues from the sale of liquefied natural gas (see Note 13). 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 condensed consolidated balance sheets. The Company’s contract liability activity for the six months ended June 30 was as follows (in thousands): 2019 Balance at beginning of period $ 968 Contract liabilities arising during the period 5,443 Revenue recognized upon completion of performance obligations during the period (700 ) Balance at end of period $ 5,711 Lease Revenues. The Company’s lease revenues are primarily from time charters, bareboat charters and non-vessel rental arrangements. The Company accounts for these leases as operating leases. The lease terms are included in the charter and rental arrangements, and the determination of whether those arrangements contain a lease generally does not require significant assumptions or judgments. The Company’s lease revenues do not include material amounts of variable payments and 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. The non-lease components included in time charter rates are typically crewing, maintenance and insurance for the vessel over the term of the lease. 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 non-vessel rental arrangements, 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. There are no non-lease components for bareboat charters and non-vessel rental arrangements. Lease revenues are generated from owned equipment as well as equipment that is leased-in from other equipment owners or financial institutions. Lease revenues from equipment that is leased-in are included in sublease income for the Company’s lessee disclosures (see Note 5). The Company’s leases generally do not provide an option for customers to purchase the leased equipment and lessees do not provide residual value guarantees. The Company expects to derive significant benefits from its equipment following the end of the lease terms. 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, 2019 , 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, 2019 , the Company’s construction in progress totaling $11.7 million primarily consisted of the construction of and upgrades to inland river towboats and other Inland Services 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, 2019 , 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, 2019 and 2018 , 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, 2019 , the Company did not recognize any impairment charges related to its 50% or less owned companies. During the six months ended June 30, 2018 , the Company recognized an impairment charge of $0.1 million related to one of its 50% or less owned companies, which is included in equity in earnings of 50% or less owned companies, net of tax in the accompanying consolidated statements of income (loss). Income Taxes. During the six months ended June 30, 2019 , the Company’s effective income tax rate of 14.5% was primarily due to taxes 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 (see Note 6). 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): 2019 2018 Balance at beginning of period $ 43,664 $ 72,453 Impact of adoption of accounting principle (1) (29,207 ) — Amortization of deferred gains included in operating expenses as a reduction to rental expense — (5,039 ) Amortization of deferred gains included in gains on asset dispositions (1,001 ) (1,012 ) Other — (1,687 ) Balance at end of period $ 13,456 $ 64,715 ______________________ (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 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 (1) — 117,543 — 112,013 Convertible Notes (2) 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 2018 Basic Weighted Average Common Shares Outstanding $ 45,126 18,076,944 $ 2.50 $ 45,767 18,023,752 $ 2.54 Effect of Dilutive Securities: Options and Restricted Stock (3) — 352,724 — 298,205 Convertible Notes 3,166 4,157,875 6,416 4,140,343 Diluted Weighted Average Common Shares Outstanding $ 48,292 22,587,543 $ 2.14 $ 52,183 22,462,300 $ 2.32 ______________________ (1) 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. (2) 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 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, 2018 , diluted earnings per common share of SEACOR excluded 202,838 and 272,694 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. New Accounting Pronouncements. On June 16, 2016, the FASB issued an amendment to the accounting standards, which replaces the current incurred loss impairment methodology for financial 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. The new standard is effective for interim and annual periods beginning after December 15, 2019. Early adoption is permitted for annual periods beginning after December 15, 2018. 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 January 26, 2017, the FASB issued an amendment to the accounting standards, which 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.

Equipment Acquisitions and Disp

Equipment Acquisitions and Dispositions	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Equipment Acquisitions and Dispositions	2. EQUIPMENT ACQUISITIONS AND DISPOSITIONS During the six months ended June 30, 2019 , capital expenditures were $7.8 million and primarily related to the acquisition of real property, upgrades to inland river towboats and the construction of other Inland Services equipment.

Investments, At Equity, And Adv

Investments, At Equity, And Advances To 50% Or Less Owned Companies	6 Months Ended
	Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investments, At Equity, And Advances To 50% Or Less Owned Companies	3. 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, 2019 , the Company earned $2.0 million for 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, 2019 , the Company and its partner each contributed capital of $2.7 million to RF Vessel Holdings. 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, 2019 , the Company earned $0.6 million for 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, 2019 , the Company earned $0.4 million for 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, 2019 , the Company earned $3.3 million for the time charter of seven inland river towboats to SCF Bunge Marine. 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, 2019 , the Company received capital distributions of $3.7 million from VA&E, which reduced the Company’s noncontrolling interest in VA&E to 23.8% . During the six months ended June 30, 2019 , the Company advanced $0.5 million to VA&E. As of June 30, 2019 , outstanding advances to VA&E were $8.2 million , inclusive of accrued and unpaid interest.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Long-term Debt and Capital Lease Obligations [Abstract]
Long-Term Debt	4. 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”), 3.25% Convertible Senior Notes, 3.0% Convertible Senior Notes and 2.5% Convertible Senior Notes (collectively the “Securities”) through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. On June 5, 2019, SEACOR’s Board of Directors increased the Company’s repurchase authority for the Securities to $150.0 million . As of June 30, 2019 , the Company’s remaining repurchase authority for the Securities was $149.8 million . 3.0% Convertible Senior Notes. During the six months ended June 30, 2019 , the Company purchased $37.3 million in principal amount of its 3.0% Convertible Senior Notes for total consideration of $36.3 million . Consideration of $36.2 million was allocated to the long-term debt resulting in debt extinguishment losses of $1.3 million included in the accompanying condensed consolidated statements of income. Consideration of $0.1 million was allocated to the purchase of the conversion option embedded in the 3.0% Convertible Senior Notes as included in the accompanying condensed consolidated statements of changes in equity. The outstanding principal amount of these notes was $70.0 million as of June 30, 2019 . SEACOR Revolving Credit Facility. On March 19, 2019, the Company entered into a $125.0 million credit agreement with a syndicate of lenders that matures March 19, 2024 (the “SEACOR Revolving Credit Facility”) and is secured by a pledge over all of SEACOR’s assets and certain of its subsidiaries’ assets, subject to certain exceptions. The SEACOR Revolving Credit Facility permits the Company to borrow up to $125.0 million , from time to time as revolving loans, as such amounts may increase or decrease in accordance with the terms of the Credit Agreement. The loans will bear interest at either (i) a Base Rate plus a margin ranging from 0.75% to 2.00% depending on the Company’s maximum net funded debt ratio, as determined in accordance with the SEACOR Revolving Credit Facility, or (ii) interest periods of one, two, three or six months at an annual rate equal to London Interbank Offered Rate (“LIBOR”) for the corresponding deposits of U.S. dollars, plus a margin ranging from 1.75% to 3.00% based on the Company’s maximum net funded debt ratio, as determined in accordance with the SEACOR Revolving Credit Facility. A fee of 0.5% is payable on the unused commitment quarterly. The Company incurred $2.2 million of issuance costs related to the SEACOR Revolving Credit Facility. The SEACOR Revolving Credit Facility contains various financial and restrictive covenants including fixed charge coverage, a net funded debt ratio, a collateral coverage ratio and restrictions limiting the Company’s ability to pay dividends or make certain investments, as well as other customary covenants, representations and warranties, and events of default as set forth in the agreement. As of June 30, 2019 , the Company had no outstanding borrowings or issued letters of credit under the SEACOR Revolving Credit Facility and the remaining availability under this facility was $125.0 million . SEA-Vista Credit Facility. During the six months ended June 30, 2019 , SEA-Vista repaid $6.0 million on the Revolving Loan and made scheduled payments of $1.5 million on the Term A-1 Loan and $2.5 million on the Term A-2 Loan. As of June 30, 2019 , SEA-Vista had $100.0 million of remaining borrowing capacity under the Revolving Loan. Other. During the six months ended June 30, 2019 , the Company made scheduled payments on other long-term debt of $0.3 million . Letters of Credit. As of June 30, 2019 , the Company had outstanding letters of credit totaling $1.3 million with various expiration dates through 2027 . Guarantees. The Company has guaranteed the payments of amounts owed under certain sale-leaseback transactions, equipment financing and multi-employer pension obligations on behalf of SEACOR Marine. As of June 30, 2019 , these guarantees on behalf of SEACOR Marine totaled $32.1 million and decline as payments are made on the outstanding obligations. The Company earns a fee of 0.5% per annum on these guarantees. For the six months ended June 30, 2019 , the fees earned by the Company for these guarantees were $0.1 million .

Operating Leases (Notes)

Operating Leases (Notes)	6 Months Ended
	Jun. 30, 2019
Operating Leases [Abstract]
Operating Leases	5. OPERATING LEASES Lessee. As of June 30, 2019 , the Company leased in two U.S.-flag petroleum and chemical carriers, five U.S.-flag harbor tugs, 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, 2019 , the remaining lease terms of the U.S.-flag petroleum and chemical carriers, which are subject to subleases, have remaining durations from 39 to 86 months. The lease terms of the other equipment range in duration from 6 to 201 months. As of June 30, 2019 , future minimum payments for operating leases for the remainder of 2019 and the years ended December 31 were as follows (in thousands): Remainder of 2019 $ 21,539 2020 41,435 2021 37,274 2022 27,447 2023 15,519 Years subsequent to 2023 40,611 183,825 Interest component (22,472 ) 161,353 Current portion of long-term operating lease liabilities (36,171 ) Long-term operating lease liabilities $ 125,182 For the six months ended June 30, 2019 , the components of lease expense were as follows (in thousands): Operating lease expense $ 21,239 Short-term lease expense (lease duration of twelve months or less at lease commencement) 12,143 Sublease income (16,786 ) $ 16,596 For the six months ended June 30, 2019 , other information related to operating leases was as follows (in thousands except weighted average data): Operating cash outflows from operating leases $ 21,404 Right-of-use assets obtained in exchange for operating lease liabilities $ 178,858 Weighted average remaining lease term, in years 5.5 Weighted average discount rate 4.8 % Lessor. As of June 30, 2019 , lessor arrangements with remaining terms in excess of one year included the bareboat charter of three U.S.-flag petroleum and chemical carriers and two foreign-flag harbor tugs, the time charter of four U.S.-flag petroleum and chemical carriers, four U.S.-flag PCTCs, seven inland river towboats and one U.S.-flag offshore tug, and other non-vessel rental arrangements of certain property and equipment. As of June 30, 2019 , future minimum lease revenues from these arrangements for the remainder of 2019 and in the years ended December 31 were as follows (in thousands): Total Minimum Lease Revenues Leased-in Obligations (1) Net Minimum Lease Income Remainder of 2019 $ 72,014 $ (15,992 ) $ 56,022 2020 137,257 (31,595 ) 105,662 2021 104,792 (29,590 ) 75,202 2022 54,374 (22,812 ) 31,562 2023 34,674 (11,315 ) 23,359 Years subsequent to 2023 87,375 (29,884 ) 57,491 ____________________ (1) The total payments to be made under existing non-cancelable leases for the property and equipment subject to these future minimum lease revenues. As of June 30, 2019 , the major classes of owned property and equipment earning lease revenues were as follows (in thousands): Historical Cost Accumulated Depreciation Net Book Value Ocean Services: Petroleum and chemical carriers - U.S.-flag $ 471,049 $ (191,734 ) $ 279,315 Harbor and offshore tugs - U.S.-flag 21,440 (2,427 ) 19,013 492,489 (194,161 ) 298,328 Inland Services: Towboats 36,236 (2,760 ) 33,476 $ 528,725 $ (196,921 ) $ 331,804

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	6. INCOME TAXES The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate on continuing operations for the six months ended June 30, 2019 : Statutory rate 21.0 % Income subject to tonnage tax (2.6 )% Non-deductible expenses 0.8 % Noncontrolling interests (4.2 )% Foreign earnings not subject to U.S. income tax (3.7 )% Foreign taxes not creditable against U.S. income tax 2.1 % Subpart F income 0.7 % State taxes 0.4 % 14.5 %

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Disclosures	7. 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, 2019 , 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 $ 139,978 $ — $ — Marketable securities (1) 39,368 — — Construction reserve funds 3,908 — — ______________________ (1) Marketable security gains (losses), net include unrealized gains of $11.0 million and $0.6 million for the three months ended June 30, 2019 and 2018 , respectively, related to marketable security positions held by the Company as of June 30, 2019 . Marketable security gains (losses), net include unrealized gains of $13.4 million and losses of $2.4 million for the six months ended June 30, 2019 and 2018 , respectively, related to marketable security positions held by the Company as of June 30, 2019 . As of June 30, 2019 , the estimated fair values of the Company’s other financial assets and liabilities were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Notes receivable from third parties (included in other receivables and other assets) $ 1,954 $ — $ 1,954 $ — Investments, at cost, in 50% or less owned companies (included in other assets) 4,300 see below LIABILITIES Long-term debt, including current portion (1) $ 312,746 $ — $ 329,192 $ — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 3.0% 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 and, accordingly, the estimates presented herein are not necessarily indicative of the amounts that the Company could realize in a current market exchange.

Stock Repurchases (Notes)

Stock Repurchases (Notes)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Stockholders' Equity Note Disclosure	8. STOCK REPURCHASES 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 4). During the six months ended June 30, 2019 , the Company acquired 3,912 shares of Common Stock for treasury for an aggregate purchase price of $0.1 million . As of June 30, 2019 , the Company’s repurchase authority for the Securities was $149.8 million . During the six months ended June 30, 2019 , the Company acquired 8,121 shares of Common Stock for treasury for an aggregate purchase price of $0.4 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 granted by SEACOR’s Board of Directors.

Noncontrolling Interests in Sub

Noncontrolling Interests in Subsidiaries	6 Months Ended
	Jun. 30, 2019
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries	9. NONCONTROLLING INTERESTS IN SUBSIDIARIES Noncontrolling interests in the Company’s consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests June 30, 2019 December 31, 2018 Ocean Services: SEA-Vista 49% $ 161,366 $ 148,665 Inland Services: Other 3.0 % – 51.8% 866 862 Other 5.0% 4 161 $ 162,236 $ 149,688 SEA-Vista. 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. As of June 30, 2019 , the net assets of SEA-Vista were $329.3 million . 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. During the six months ended June 30, 2018 , the net income of SEA-Vista was $12.0 million , of which $5.9 million was attributable to noncontrolling interests.

Multi-Employer and Defined Bene

Multi-Employer and Defined Benefit Pension Plans	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Multi-Employer and Defined Benefit Pension Plans	10. MULTI-EMPLOYER AND DEFINED BENEFIT PENSION PLANS AMOPP. During the six months ended June 30, 2019 , the Company received notification from the AMOPP that the Company’s withdrawal liability, as of September 30, 2018 would have been, $28.1 million based on an actuarial valuation performed as of that date. That liability may change in future years based on various factors, primarily employee census. As of June 30, 2019 , 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 and the ten-year rehabilitation plan, it is possible that the AMOPP will experience further 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, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation	11. SHARE BASED COMPENSATION During the six months ended June 30, 2019 , 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 22,577 Restricted stock awards granted 149,950 Stock Option Activities: Outstanding as of December 31, 2018 1,467,391 Granted 88,975 Exercised (57,866 ) Expired (7,463 ) Outstanding as of June 30, 2019 1,491,037 Shares available for future grants and ESPP purchases as of June 30, 2019 629,054

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	12. COMMITMENTS AND CONTINGENCIES As of June 30, 2019 , the Company's capital commitments by year of expected payment were as follows (in thousands): Remainder of 2019 2020 Total Ocean Services $ 1,052 $ 8,523 $ 9,575 Inland Services 17,047 875 17,922 Other 1,374 — 1,374 $ 19,473 $ 9,398 $ 28,871 Ocean Services' capital commitments included the Company's interest in two foreign-flag rail ferries. Inland Services’ capital commitments included two inland river towboats, 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 one of the 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. At present, there is only one remaining claim, although as noted herein it is the subject of a pending dismissal motion. Specifically, on April 8, 2013, the Company, ORM, and NRC were named as defendants in William and Dianna Fitzgerald v. BP Exploration et al. , No. 2:13-CV-00650 (E.D. La.) (the “ Fitzgerald Action”), which is a suit by a husband and wife whose son allegedly participated in the clean-up effort and became ill as a result of his exposure to oil and dispersants. While the Fitzgerald Action was dismissed against ORM and NRC by virtue of the Remaining Eleven Plaintiffs’ Dismissal Order, the claim against the Company remained pending. On July 18, 2019, the Company and the remaining plaintiffs filed a joint motion to dismiss all claims by such plaintiffs against the Company with prejudice. 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 will 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. The 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 2019, BP has tendered approximately 2,350 claims pursuant to the Medical Settlement’s BELO provision for indemnity to ORM and approximately 225 of such claims to NRC. Recently, 219 of the claims that were tendered by BP to ORM and 18 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 nine 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 the immunity already afforded to ORM and NRC via the B3 Dismissal Order and the Remaining Eleven Plaintiffs’ Dismissal Order operates to bar any indemnity or contribution claims against them by BP. BP answered the Complaint in the Declaratory Judgment Action on May 7, 2019 and also asserted three counterclaims against ORM and NRC. ORM and NRC moved to dismiss the majority of BP’s counterclaims on June 18, 2019 and that motion remains pending. The Court has also ordered the parties to participate in early mediation per BP’s request. Mediation proceedings are currently scheduled for July 30, 2019 and the parties continue to exchange information and dialogue in advance of those proceedings. BP has also similarly tendered 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 have also rejected these demands. 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 have preserved their 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, 2019
Segment Reporting [Abstract]
Segment Information	13. 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, 2018 . 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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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) Costs of goods sold related to product sales was $2.4 million . Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2018 Operating Revenues: External customers 105,155 73,409 37,298 969 — 216,831 Intersegment — — 10 — (10 ) — 105,155 73,409 37,308 969 (10 ) 216,831 Costs and Expenses: Operating 75,044 62,361 24,399 392 (28 ) 162,168 Administrative and general 10,328 3,216 5,140 498 5,129 24,311 Depreciation and amortization 11,620 6,243 491 62 428 18,844 96,992 71,820 30,030 952 5,529 205,323 Gains on Asset Dispositions, Net 3 503 — — — 506 Operating Income (Loss) 8,166 2,092 7,278 17 (5,539 ) 12,014 Other Income (Expense): Foreign currency gains (losses), net (76 ) (1,183 ) (17 ) 1 (71 ) (1,346 ) Other, net 398 14 — 53,902 (3 ) 54,311 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,267 584 (32 ) 112 — 1,931 Segment Profit 9,755 1,507 7,229 54,032 Other Income (Expense) not included in Segment Profit (11,050 ) Less Equity Earnings included in Segment Profit (1,931 ) Income Before Taxes and Equity Earnings 53,929 Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2018 Operating Revenues: External customers 207,539 129,330 63,701 1,085 — 401,655 Intersegment — — 39 — (39 ) — 207,539 129,330 63,740 1,085 (39 ) 401,655 Costs and Expenses: Operating 140,377 110,542 42,705 392 (71 ) 293,945 Administrative and general 20,877 6,528 10,507 684 11,510 50,106 Depreciation and amortization 24,265 12,477 792 62 857 38,453 185,519 129,547 54,004 1,138 12,296 382,504 Gains on Asset Dispositions, Net 1,886 5,665 — — — 7,551 Operating Income (Loss) 23,906 5,448 9,736 (53 ) (12,335 ) 26,702 Other Income (Expense): Foreign currency gains (losses), net (127 ) 520 (15 ) 1 (35 ) 344 Other, net 681 14 — 53,902 (3 ) 54,594 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,582 (1,870 ) 103 1,279 — 1,094 Segment Profit 26,042 4,112 9,824 55,129 Other Income (Expense) not included in Segment Profit (21,597 ) Less Equity Earnings included in Segment Profit (1,094 ) Income Before Taxes and Equity Earnings 60,043 Capital Expenditures 28,503 2,917 — 85 127 31,632 As of June 30, 2018 Property and Equipment: Historical cost 920,908 436,780 1,227 4,467 30,132 1,393,514 Accumulated depreciation (320,659 ) (184,747 ) (984 ) (62 ) (21,362 ) (527,814 ) Net property and equipment 600,249 252,033 243 4,405 8,770 865,700 Investments, at Equity, and Advances to 50% or Less Owned Companies 59,527 64,398 589 25,644 — 150,158 Inventories 2,172 2,208 152 158 — 4,690 Goodwill 1,852 2,416 28,506 — — 32,774 Intangible Assets 9,629 9,738 7,531 — — 26,898 Other current and long-term assets, excluding cash and near cash assets (1) 56,888 73,980 61,035 2,789 4,747 199,439 Segment Assets 730,317 404,773 98,056 32,996 Cash and near cash assets (1) 376,265 Total Assets 1,655,924 ______________________ (1) Cash and near cash assets includes cash, cash equivalents, restricted cash, restricted cash equivalents, marketable securities and construction reserve funds. Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2018 Revenues from Contracts with Customers: Voyage charters 41,258 — — — — 41,258 Contracts of affreightment 7,865 96,303 — — — 104,168 Tariff 36,540 — — — — 36,540 Unit freight 27,579 — — — — 27,579 Terminal operations — 11,814 — — — 11,814 Fleeting operations — 8,952 — — — 8,952 Logistics Services — 6,214 — — — 6,214 Time and material contracts — — 58,031 — — 58,031 Retainer contracts — — 4,742 — — 4,742 Product sales (1) — — — 610 — 610 Other 1,497 2,369 967 416 (39 ) 5,210 Lease Revenues: Time charter, bareboat charter and rental income 92,800 3,678 — 59 — 96,537 207,539 129,330 63,740 1,085 (39 ) 401,655 ______________________ (1) Costs of goods sold related to product sales was $0.3 million .

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
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 those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2018 . The condensed consolidated financial information for the three and six months ended June 30, 2019 and 2018 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, 2019 , its results of operations for the three and six months ended June 30, 2019 and 2018 , its comprehensive income for the three and six months ended June 30, 2019 and 2018 , its changes in equity for the three and six months ended June 30, 2019 and 2018 , and its cash flows for the six months ended June 30, 2019 and 2018 . 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, 2018 .
Adoption of New Accounting Standards	Adoption of New Accounting Standards. On January 1, 2019, the Company adopted Financial Accounting Standards Board (“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 recorded operating lease right-of-use assets and lease liabilities of $174.6 million for certain of its equipment, offices, real property and land leases (see Note 5). In addition, 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. On January 1, 2018, the Company adopted ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory , which eliminates the deferral of the tax effects of intercompany asset sales other than inventory until the transferred assets are sold to a third party or recovered through use. As a result of the adoption of the standard, the deferred tax charges previously recognized from those sales resulted in a decrease in deferred tax assets and a cumulative adjustment to retained earnings of $2.5 million in the consolidated balance sheets and statements of changes in equity as of January 1, 2018.
Revenue Recognition	Revenue Recognition. 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. Revenue from Contracts with Customers. Ocean Services primarily earns revenues 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 13). 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 management agreements whereby Ocean Services provides technical ship management services to third-party customers for a predetermined price over a specified period of time, typically a year or more. Inland Services primarily earns revenues from contracts of affreightment, terminal operations, fleeting operations and repair and maintenance services (see Note 13). 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 primarily earns revenues from time and material and retainer contracts (see Note 13). 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 Energy Solutions LLC and its subsidiaries (collectively “Cleancor”), which primarily earns revenues from the sale of liquefied natural gas (see Note 13). 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 condensed consolidated balance sheets. The Company’s contract liability activity for the six months ended June 30 was as follows (in thousands): 2019 Balance at beginning of period $ 968 Contract liabilities arising during the period 5,443 Revenue recognized upon completion of performance obligations during the period (700 ) Balance at end of period $ 5,711
Lease Revenues	Lease Revenues. The Company’s lease revenues are primarily from time charters, bareboat charters and non-vessel rental arrangements. The Company accounts for these leases as operating leases. The lease terms are included in the charter and rental arrangements, and the determination of whether those arrangements contain a lease generally does not require significant assumptions or judgments. The Company’s lease revenues do not include material amounts of variable payments and 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. The non-lease components included in time charter rates are typically crewing, maintenance and insurance for the vessel over the term of the lease. 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 non-vessel rental arrangements, 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. There are no non-lease components for bareboat charters and non-vessel rental arrangements. Lease revenues are generated from owned equipment as well as equipment that is leased-in from other equipment owners or financial institutions. Lease revenues from equipment that is leased-in are included in sublease income for the Company’s lessee disclosures (see Note 5). The Company’s leases generally do not provide an option for customers to purchase the leased equipment and lessees do not provide residual value guarantees. The Company expects to derive significant benefits from its equipment following the end of the lease terms.
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, 2019 , 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, 2019 , the Company’s construction in progress totaling $11.7 million primarily consisted of the construction of and upgrades to inland river towboats and other Inland Services 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, 2019 , 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, 2019 and 2018 , 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, 2019 , the Company did not recognize any impairment charges related to its 50% or less owned companies. During the six months ended June 30, 2018 , the Company recognized an impairment charge of $0.1 million related to one of its 50% or less owned companies, which is included in equity in earnings of 50% or less owned companies, net of tax in the accompanying consolidated statements of income (loss).
Income Taxes	Income Taxes. During the six months ended June 30, 2019 , the Company’s effective income tax rate of 14.5% was primarily due to taxes 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 (see Note 6).
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): 2019 2018 Balance at beginning of period $ 43,664 $ 72,453 Impact of adoption of accounting principle (1) (29,207 ) — Amortization of deferred gains included in operating expenses as a reduction to rental expense — (5,039 ) Amortization of deferred gains included in gains on asset dispositions (1,001 ) (1,012 ) Other — (1,687 ) Balance at end of period $ 13,456 $ 64,715 ______________________ (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 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 (1) — 117,543 — 112,013 Convertible Notes (2) 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 2018 Basic Weighted Average Common Shares Outstanding $ 45,126 18,076,944 $ 2.50 $ 45,767 18,023,752 $ 2.54 Effect of Dilutive Securities: Options and Restricted Stock (3) — 352,724 — 298,205 Convertible Notes 3,166 4,157,875 6,416 4,140,343 Diluted Weighted Average Common Shares Outstanding $ 48,292 22,587,543 $ 2.14 $ 52,183 22,462,300 $ 2.32 ______________________ (1) 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. (2) 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 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, 2018 , diluted earnings per common share of SEACOR excluded 202,838 and 272,694 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive.
New Accounting Pronouncements	New Accounting Pronouncements. On June 16, 2016, the FASB issued an amendment to the accounting standards, which replaces the current incurred loss impairment methodology for financial 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. The new standard is effective for interim and annual periods beginning after December 15, 2019. Early adoption is permitted for annual periods beginning after December 15, 2018. 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 January 26, 2017, the FASB issued an amendment to the accounting standards, which 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.

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
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): 2019 Balance at beginning of period $ 968 Contract liabilities arising during the period 5,443 Revenue recognized upon completion of performance obligations during the period (700 ) Balance at end of period $ 5,711
Property, Plant and Equipment	As of June 30, 2019 , 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): 2019 2018 Balance at beginning of period $ 43,664 $ 72,453 Impact of adoption of accounting principle (1) (29,207 ) — Amortization of deferred gains included in operating expenses as a reduction to rental expense — (5,039 ) Amortization of deferred gains included in gains on asset dispositions (1,001 ) (1,012 ) Other — (1,687 ) Balance at end of period $ 13,456 $ 64,715 ______________________ (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 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 (1) — 117,543 — 112,013 Convertible Notes (2) 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 2018 Basic Weighted Average Common Shares Outstanding $ 45,126 18,076,944 $ 2.50 $ 45,767 18,023,752 $ 2.54 Effect of Dilutive Securities: Options and Restricted Stock (3) — 352,724 — 298,205 Convertible Notes 3,166 4,157,875 6,416 4,140,343 Diluted Weighted Average Common Shares Outstanding $ 48,292 22,587,543 $ 2.14 $ 52,183 22,462,300 $ 2.32 ______________________ (1) 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. (2) 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 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, 2018 , diluted earnings per common share of SEACOR excluded 202,838 and 272,694 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive.

Operating Leases (Tables)

Operating Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Operating Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity	As of June 30, 2019 , future minimum payments for operating leases for the remainder of 2019 and the years ended December 31 were as follows (in thousands): Remainder of 2019 $ 21,539 2020 41,435 2021 37,274 2022 27,447 2023 15,519 Years subsequent to 2023 40,611 183,825 Interest component (22,472 ) 161,353 Current portion of long-term operating lease liabilities (36,171 ) Long-term operating lease liabilities $ 125,182
Lease, Cost	For the six months ended June 30, 2019 , the components of lease expense were as follows (in thousands): Operating lease expense $ 21,239 Short-term lease expense (lease duration of twelve months or less at lease commencement) 12,143 Sublease income (16,786 ) $ 16,596
Operating Leases Other Information	For the six months ended June 30, 2019 , other information related to operating leases was as follows (in thousands except weighted average data): Operating cash outflows from operating leases $ 21,404 Right-of-use assets obtained in exchange for operating lease liabilities $ 178,858 Weighted average remaining lease term, in years 5.5 Weighted average discount rate 4.8 %
Schedule of Future Minimum Lease Revenues for Operating Leases	As of June 30, 2019 , future minimum lease revenues from these arrangements for the remainder of 2019 and in the years ended December 31 were as follows (in thousands): Total Minimum Lease Revenues Leased-in Obligations (1) Net Minimum Lease Income Remainder of 2019 $ 72,014 $ (15,992 ) $ 56,022 2020 137,257 (31,595 ) 105,662 2021 104,792 (29,590 ) 75,202 2022 54,374 (22,812 ) 31,562 2023 34,674 (11,315 ) 23,359 Years subsequent to 2023 87,375 (29,884 ) 57,491 ____________________ (1) The total payments to be made under existing non-cancelable leases for the property and equipment subject to these future minimum lease revenues.
Major Classes of Property and Equipment Earning Lease Revenues	As of June 30, 2019 , the major classes of owned property and equipment earning lease revenues were as follows (in thousands): Historical Cost Accumulated Depreciation Net Book Value Ocean Services: Petroleum and chemical carriers - U.S.-flag $ 471,049 $ (191,734 ) $ 279,315 Harbor and offshore tugs - U.S.-flag 21,440 (2,427 ) 19,013 492,489 (194,161 ) 298,328 Inland Services: Towboats 36,236 (2,760 ) 33,476 $ 528,725 $ (196,921 ) $ 331,804

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate on continuing operations for the six months ended June 30, 2019 : Statutory rate 21.0 % Income subject to tonnage tax (2.6 )% Non-deductible expenses 0.8 % Noncontrolling interests (4.2 )% Foreign earnings not subject to U.S. income tax (3.7 )% Foreign taxes not creditable against U.S. income tax 2.1 % Subpart F income 0.7 % State taxes 0.4 % 14.5 %

Fair Value Measurements Fair _2

Fair Value Measurements Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	As of June 30, 2019 , 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 $ 139,978 $ — $ — Marketable securities (1) 39,368 — — Construction reserve funds 3,908 — — ______________________ (1) Marketable security gains (losses), net include unrealized gains of $11.0 million and $0.6 million for the three months ended June 30, 2019 and 2018 , respectively, related to marketable security positions held by the Company as of June 30, 2019 . Marketable security gains (losses), net include unrealized gains of $13.4 million and losses of $2.4 million for the six months ended June 30, 2019 and 2018 , respectively, related to marketable security positions held by the Company as of June 30, 2019 .
Estimated Fair Value of Other Financial Assets and Liabilities	As of June 30, 2019 , the estimated fair values of the Company’s other financial assets and liabilities were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Notes receivable from third parties (included in other receivables and other assets) $ 1,954 $ — $ 1,954 $ — Investments, at cost, in 50% or less owned companies (included in other assets) 4,300 see below LIABILITIES Long-term debt, including current portion (1) $ 312,746 $ — $ 329,192 $ — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 3.0% Convertible Senior Notes and 3.25% Convertible Senior Notes.

Noncontrolling Interests in S_2

Noncontrolling Interests in Subsidiaries (Tables)	6 Months Ended
	Jun. 30, 2019
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries	Noncontrolling interests in the Company’s consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests June 30, 2019 December 31, 2018 Ocean Services: SEA-Vista 49% $ 161,366 $ 148,665 Inland Services: Other 3.0 % – 51.8% 866 862 Other 5.0% 4 161 $ 162,236 $ 149,688

Share Based Compensation (Table

Share Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Plans	During the six months ended June 30, 2019 , 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 22,577 Restricted stock awards granted 149,950 Stock Option Activities: Outstanding as of December 31, 2018 1,467,391 Granted 88,975 Exercised (57,866 ) Expired (7,463 ) Outstanding as of June 30, 2019 1,491,037 Shares available for future grants and ESPP purchases as of June 30, 2019 629,054

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure	As of June 30, 2019 , the Company's capital commitments by year of expected payment were as follows (in thousands): Remainder of 2019 2020 Total Ocean Services $ 1,052 $ 8,523 $ 9,575 Inland Services 17,047 875 17,922 Other 1,374 — 1,374 $ 19,473 $ 9,398 $ 28,871

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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 Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2018 Operating Revenues: External customers 105,155 73,409 37,298 969 — 216,831 Intersegment — — 10 — (10 ) — 105,155 73,409 37,308 969 (10 ) 216,831 Costs and Expenses: Operating 75,044 62,361 24,399 392 (28 ) 162,168 Administrative and general 10,328 3,216 5,140 498 5,129 24,311 Depreciation and amortization 11,620 6,243 491 62 428 18,844 96,992 71,820 30,030 952 5,529 205,323 Gains on Asset Dispositions, Net 3 503 — — — 506 Operating Income (Loss) 8,166 2,092 7,278 17 (5,539 ) 12,014 Other Income (Expense): Foreign currency gains (losses), net (76 ) (1,183 ) (17 ) 1 (71 ) (1,346 ) Other, net 398 14 — 53,902 (3 ) 54,311 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,267 584 (32 ) 112 — 1,931 Segment Profit 9,755 1,507 7,229 54,032 Other Income (Expense) not included in Segment Profit (11,050 ) Less Equity Earnings included in Segment Profit (1,931 ) Income Before Taxes and Equity Earnings 53,929 Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2018 Operating Revenues: External customers 207,539 129,330 63,701 1,085 — 401,655 Intersegment — — 39 — (39 ) — 207,539 129,330 63,740 1,085 (39 ) 401,655 Costs and Expenses: Operating 140,377 110,542 42,705 392 (71 ) 293,945 Administrative and general 20,877 6,528 10,507 684 11,510 50,106 Depreciation and amortization 24,265 12,477 792 62 857 38,453 185,519 129,547 54,004 1,138 12,296 382,504 Gains on Asset Dispositions, Net 1,886 5,665 — — — 7,551 Operating Income (Loss) 23,906 5,448 9,736 (53 ) (12,335 ) 26,702 Other Income (Expense): Foreign currency gains (losses), net (127 ) 520 (15 ) 1 (35 ) 344 Other, net 681 14 — 53,902 (3 ) 54,594 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,582 (1,870 ) 103 1,279 — 1,094 Segment Profit 26,042 4,112 9,824 55,129 Other Income (Expense) not included in Segment Profit (21,597 ) Less Equity Earnings included in Segment Profit (1,094 ) Income Before Taxes and Equity Earnings 60,043 Capital Expenditures 28,503 2,917 — 85 127 31,632 As of June 30, 2018 Property and Equipment: Historical cost 920,908 436,780 1,227 4,467 30,132 1,393,514 Accumulated depreciation (320,659 ) (184,747 ) (984 ) (62 ) (21,362 ) (527,814 ) Net property and equipment 600,249 252,033 243 4,405 8,770 865,700 Investments, at Equity, and Advances to 50% or Less Owned Companies 59,527 64,398 589 25,644 — 150,158 Inventories 2,172 2,208 152 158 — 4,690 Goodwill 1,852 2,416 28,506 — — 32,774 Intangible Assets 9,629 9,738 7,531 — — 26,898 Other current and long-term assets, excluding cash and near cash assets (1) 56,888 73,980 61,035 2,789 4,747 199,439 Segment Assets 730,317 404,773 98,056 32,996 Cash and near cash assets (1) 376,265 Total Assets 1,655,924 ______________________ (1) Cash and near cash assets includes cash, cash equivalents, restricted cash, restricted cash equivalents, marketable securities and construction reserve funds.
Disaggregation of Revenue	Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 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) Costs of goods sold related to product sales was $2.4 million .	Ocean Services $’000 Inland Services $’000 Witt O’Brien’s $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2018 Revenues from Contracts with Customers: Voyage charters 41,258 — — — — 41,258 Contracts of affreightment 7,865 96,303 — — — 104,168 Tariff 36,540 — — — — 36,540 Unit freight 27,579 — — — — 27,579 Terminal operations — 11,814 — — — 11,814 Fleeting operations — 8,952 — — — 8,952 Logistics Services — 6,214 — — — 6,214 Time and material contracts — — 58,031 — — 58,031 Retainer contracts — — 4,742 — — 4,742 Product sales (1) — — — 610 — 610 Other 1,497 2,369 967 416 (39 ) 5,210 Lease Revenues: Time charter, bareboat charter and rental income 92,800 3,678 — 59 — 96,537 207,539 129,330 63,740 1,085 (39 ) 401,655 ______________________ (1) Costs of goods sold related to product sales was $0.3 million .

Basis of Presentation and Acc_4

Basis of Presentation and Accounting Policies - Adoption of New Accounting Standards (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle	$ 25,359	$ (2,467)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle	174,600
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
Accounting Standards Update 2016-16 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of accounting principle		$ (2,467)

Basis of Presentation and Acc_5

Basis of Presentation and Accounting Policies - Revenue Recognition (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Change in Contract with Customer, Liability [Roll Forward]
Balance at beginning of period	$ 968
Contract liabilities arising during the period	5,443
Revenue recognized upon completion of performance obligations during the period	(700)
Balance at end of period	$ 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, 2019USD ($)
Property, Plant and Equipment [Line Items]
Construction in progress	$ 11.7
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 - Impairment of 50% or Less Owned Companies (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Other Equity Method Investments
Schedule Of Equity Method Investments [Line Items]
Impairment charge for an other-than-temporary decline in fair value	$ 0.1

Basis of Presentation and Acc_8

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

Basis of Presentation and Acc_9

Basis of Presentation and Accounting Policies - Deferred Gains (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Jan. 01, 2018
Deferred Gains [Roll Forward]
Balance at beginning of period	$ 43,664	$ 72,453
Other	0	(1,687)
Balance at end of period	13,456	64,715
Operating Expense
Deferred Gains [Roll Forward]
Amortization of deferred gains on sale of property	0	(5,039)
Gain (Loss) on Disposition of Assets
Deferred Gains [Roll Forward]
Amortization of deferred gains on sale of property	$ (1,001)	$ (1,012)
Accounting Standards Update 2016-02 | Sale-Leaseback | Retained Earnings
Nature of Operations and Accounting Policies [Line Items]
Impact of adoption of accounting principle			$ 29,207	$ 0

Basis of Presentation and Ac_10

Basis of Presentation and Accounting Policies - Earning Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 14,553	$ 45,126	$ 22,286	$ 45,767
Effect of Dilutive Securities:
Options and Restricted Stock	0	0	0	0
Convertible Notes	318	3,166	637	6,416
Net Income, diluted	$ 14,871	$ 48,292	$ 22,923	$ 52,183
Weighted average number of shares outstanding, basic (in shares)	18,288,879	18,076,944	18,260,876	18,023,752
Effect of Dilutive Securities:
Options and Restricted Stock (in shares)	117,543	352,724	112,013	298,205
Convertible Notes (in shares)	1,227,101	4,157,875	1,227,101	4,140,343
Weighted average number of shares outstanding, diluted (in shares)	19,633,523	22,587,543	19,599,990	22,462,300
Basic earnings per common share (in dollars per share)	$ 0.80	$ 2.50	$ 1.22	$ 2.54
Diluted earnings per common share (in dollars per share)	$ 0.76	$ 2.14	$ 1.17	$ 2.32
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)	893,722	202,838	919,121	272,694
Convertible Debt Securities | 3.0% Convertible Senior Notes
Effect of Dilutive Securities:
Anti-dilutive securities (in shares)	958,418		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

Equipment Acquisitions and Di_2

Equipment Acquisitions and Dispositions (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Payments to acquire property, plant and equipment	$ 7,750	$ 31,632

Investments, At Equity, And A_2

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)equipmentrail_ferry
RF Vessel Holdings
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions	$ 2.7
VA&E
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Distribution, Return of Capital	$ 3.7
Equity Method Investment, Ownership Percentage	23.80%
Advances and Loans to Affiliate	$ 8.2
U.S.-flag Offshore Tug | Trailer Bridge
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | equipment	1
Foreign-flag Rail Ferries | RF Vessel Holdings
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | rail_ferry	2
Foreign-flag Harbor Tugs | KSM
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | rail_ferry	2
Number of equipment operated | rail_ferry	4
Foreign-flag Ocean Liquid Tank Barge | KSM
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | rail_ferry	1
Foreign-flag Specialty Vessel | KSM
Schedule Of Equity Method Investments [Line Items]
Number of equipment operated | rail_ferry	2
Inland River Towboats
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | equipment	4
Inland River Towboats | SCF Bunge Marine
Schedule Of Equity Method Investments [Line Items]
Equipment Subject to Operating Lease, Number of Units | equipment	7
Subordinated Debt | VA&E
Schedule Of Equity Method Investments [Line Items]
Payments for Advances and Loans to Affiliate	$ 0.5
Time Charter | Trailer Bridge
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	2
Time Charter | SCF Bunge Marine
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	3.3
Bareboat Charter | KSM
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	0.6
Rental Income | Bunge SCF Grain
Schedule Of Equity Method Investments [Line Items]
Revenue from Related Parties	$ 0.4

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	Mar. 19, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 05, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Common stock, par value (in dollars per share)		$ 0.01		$ 0.01			$ 0.01
Securities Repurchase Plan, Authorized Repurchase Amount						$ 150,000,000
Securities Repurchase Plan, Remaining Authorized Repurchase Amount		$ 149,800,000		$ 149,800,000
Debt extinguishment losses, net		(503,000)	$ (5,407,000)	(1,296,000)	$ (5,449,000)
Payments For Conversion Option In Convertible Debt				130,000	5,000
Payments of debt issuance costs				2,197,000	2,495,000
Repayments of long-term debt				46,499,000	$ 30,514,000
Letters of credit outstanding, amount		1,300,000		$ 1,300,000
Interest rate earned on guarantees				0.50%
SEACOR Marine Holdings Inc.
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted		$ 32,100,000		$ 32,100,000
Guarantee Fee Income				$ 100,000
Three Point Two Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.25%		3.25%
Three Point Zero Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.00%		3.00%
Debt Instrument, Conversion Option | Three Point Zero Percentage Convertible Notes
Debt Instrument [Line Items]
Payments For Conversion Option In Convertible Debt				$ 100,000
Convertible Debt | 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		$ 37,300,000		$ 37,300,000
Repayments of Long-term Debt and Payments for Conversion Option in Convertible Debt				36,300,000
Debt extinguishment losses, net				(1,300,000)
Long-term debt		$ 70,000,000		70,000,000
Repayments of long-term debt				$ 36,200,000
Convertible Debt | Two Point Five Percentage Convertible Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		2.50%		2.50%
Line of Credit | SEACOR Revolving Credit Facility
Debt Instrument [Line Items]
Payments of debt issuance costs	$ 2,200,000
Line of credit facility, remaining borrowing capacity		$ 125,000,000		$ 125,000,000
Line of Credit | SEACOR Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.75%
Line of Credit | SEACOR Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.00%
Line of Credit | SEACOR Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.75%
Line of Credit | SEACOR Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.00%
Line of Credit | SEA-Vista Credit Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity		$ 100,000,000		$ 100,000,000
Line of Credit | Revolving Credit Facility | SEACOR Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 125,000,000
Line of Credit Facility, Commitment Fee Percentage				0.50%
Line of Credit | Revolving Credit Facility | SEA-Vista Credit Facility
Debt Instrument [Line Items]
Repayments of long-term debt				$ 6,000,000
Line of Credit | Secured Debt | Sea-Vista Credit Facility, Term Loan A-1
Debt Instrument [Line Items]
Repayments of long-term debt				1,500,000
Line of Credit | Secured Debt | Sea-Vista Credit Facility, Term Loan A-2
Debt Instrument [Line Items]
Repayments of long-term debt				2,500,000
Notes Payable, Other Payables
Debt Instrument [Line Items]
Repayments of long-term debt				$ 300,000

Operating Leases (Details)

Operating Leases (Details)	6 Months Ended
	Jun. 30, 2019equipmentrail_ferry
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	P39M
Petroleum and Chemical Carriers - U.S.-flag | Maximum
Operating Leases [Line Items]
Sale Leaseback Transaction, Lease Terms	P86M
Harbor Tugs - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	5
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	6 months
Other Equipment | Maximum
Operating Leases [Line Items]
Lessee, Operating Lease, Term of Contract	201 months
Bareboat Chartered, Petroleum and Chemical Carriers - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	3
Bareboat Chartered, Harbor Tugs - Foreign-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units | rail_ferry	2
Time Chartered, Petroleum and Chemical Carriers - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	4
Time Chartered, PCTCs - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	4
Time Chartered, Inland River Towboats
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	7
Time Chartered, Offshore Tug - U.S.-flag
Operating Leases [Line Items]
Equipment Subject to Operating Lease, Number of Units	1

Operating Leases Lessee, Operat

Operating Leases Lessee, Operating Lease, Liability, Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Future Minimum Operating Lease Payments, Remainder of 2019	$ 21,539
Future Minimum Operating Lease Payments, 2020	41,435
Future Minimum Operating Lease Payments, 2021	37,274
Future Minimum Operating Lease Payments, 2022	27,447
Future Minimum Operating Lease Payments, 2023	15,519
Future Minimum Operating Lease Payments, Years subsequent to 2023	40,611
Future Minimum Operating Lease Payments	183,825
Interest component	(22,472)
Operating lease liability	161,353
Current portion of long-term operating lease liabilities	(36,171)	$ 0
Long-term operating lease liabilities	$ 125,182	$ 0

Operating Leases Lease, Cost (D

Operating Leases Lease, Cost (Details)	6 Months Ended
	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating lease expense	$ 21,239,000
Short-term lease expense (lease duration of twelve months or less at lease commencement)	12,143,000
Sublease income	(16,786,000)
Lease cost	$ 16,596,000

Operating Leases Operating Leas

Operating Leases Operating Leases Other Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating cash outflows from operating leases	$ 21,404
Right-of-use assets obtained in exchange for operating lease liabilities	$ 178,858
Weighted average remaining lease term, in years	5 years 6 months
Weighted average discount rate	4.80%

Operating Leases Schedule of Fu

Operating Leases Schedule of Future Minimum Lease Revenues for Operating Leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
Total Minimum Lease Revenues, Remainder of 2019	$ (72,014)
Total Minimum Lease Revenues, 2020	(137,257)
Total Minimum Lease Revenues, 2021	(104,792)
Total Minimum Lease Revenues, 2022	(54,374)
Total Minimum Lease Revenues, 2023	(34,674)
Total Minimum Lease Revenues, Years subsequent to 2023	(87,375)
Leased-In Obligations, Remainder of 2019	15,992
Leased-In Obligations, 2020	31,595
Leased-In Obligations, 2021	29,590
Leased-In Obligations, 2022	22,812
Leased-In Obligations, 2023	11,315
Leased-In Obligations, Years subsequent to 2023	29,884
Net Minimum Lease Income, Remainder of 2019	56,022
Net Minimum Lease Income, 2020	105,662
Net Minimum Lease Income, 2021	75,202
Net Minimum Lease Income, 2022	31,562
Net Minimum Lease Income, 2023	23,359
Net Minimum Lease Income, Years subsequent to 2023	$ 57,491

Operating Leases Major Classes

Operating Leases Major Classes of Property and Equipment Earning Lease Revenues (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	$ 1,416,084	$ 1,407,329	$ 1,393,514
Accumulated depreciation	593,168	560,819	527,814
Net property and equipment	822,916	$ 846,510	$ 865,700
Property Subject to Operating Lease
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	528,725
Accumulated depreciation	196,921
Net property and equipment	331,804
Ocean Services | Property Subject to Operating Lease
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	492,489
Accumulated depreciation	194,161
Net property and equipment	298,328
Ocean Services | Property Subject to Operating Lease | Petroleum and Chemical Carriers - U.S.-flag
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	471,049
Accumulated depreciation	191,734
Net property and equipment	279,315
Ocean Services | Property Subject to Operating Lease | Harbor and Offshore Tugs - U.S.-flag
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	21,440
Accumulated depreciation	2,427
Net property and equipment	19,013
Inland Services | Property Subject to Operating Lease | Inland River Towboats
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]
Historical cost	36,236
Accumulated depreciation	2,760
Net property and equipment	$ 33,476

Income Taxes (Details)

Income Taxes (Details)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Statutory rate	21.00%
Income subject to tonnage tax	2.60%
Non-deductible expenses	(0.80%)
Noncontrolling interests	(4.20%)
Foreign earnings not subject to U.S. income tax	(3.70%)
Foreign taxes not creditable against U.S. income tax	2.10%
Subpart F income	0.70%
State taxes	0.40%
Effective income tax rate	14.50%

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable security gains (losses), net	$ 11,000	$ 600	$ 13,400	$ (2,400)
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	139,978		139,978
Marketable securities	39,368		39,368
Construction reserve funds	3,908		3,908
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
Construction reserve funds	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
Construction reserve funds	$ 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, 2019USD ($)
3.0% Convertible Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, interest rate, stated percentage	3.00%
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 | 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)	$ 1,954
Investments, at cost, in 50% or less owned companies (included in other assets)	4,300
Long-term debt, including current portion	312,746
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)	1,954
Long-term debt, including current portion	329,192
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) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)shares
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired | shares		3,912
Treasury Stock, Value, Acquired, Cost Method	$ 165	$ 516
Securities Repurchase Plan, Remaining Authorized Repurchase Amount	$ 149,800	$ 149,800
Share Incentive Plans | Restricted Stock
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired | shares		8,121
Treasury Stock, Value, Acquired, Cost Method		$ 400
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method		$ 100

Noncontrolling Interests in S_3

Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 162,236		$ 162,236		$ 149,688
Net Income	17,001	$ 46,007	30,069	$ 51,565
Net income attributable to noncontrolling interest	$ 2,448	$ 881	$ 7,783	5,798
Sea-Vista | Ocean Services
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	49.00%		49.00%
Noncontrolling interests in subsidiaries	$ 161,366		$ 161,366		148,665
Other Inland River Services Noncontrolling Interests | Inland Services
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 866		$ 866		862
Other Inland River Services Noncontrolling Interests | Minimum | Inland Services
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	3.00%		3.00%
Other Inland River Services Noncontrolling Interests | Maximum | Inland Services
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	51.80%		51.80%
Other Noncontrolling Interests | Other Segment
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	5.00%		5.00%
Noncontrolling interests in subsidiaries	$ 4		$ 4		$ 161
Sea-Vista | Ocean Services
Noncontrolling Interests in Subsidiaries [Line Items]
Assets, net	$ 329,300		329,300
Net Income			15,900	12,000
Net income attributable to noncontrolling interest			$ 7,800	$ 5,900

Multi-Employer and Defined Be_2

Multi-Employer and Defined Benefit Pension Plans (Details) $ in Millions	Sep. 30, 2018USD ($)
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	$ 28.1

Share Based Compensation (Detai

Share Based Compensation (Details)	6 Months Ended
	Jun. 30, 2019shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Director stock awards granted (in shares)	1,125
Employee Stock Purchase Plan shares issued (in shares)	22,577
Restricted stock awards granted (in shares)	149,950
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options, outstanding as of December 31, 2018 (in shares)	1,467,391
Stock options, granted (in shares)	88,975
Stock options, exercised (in shares)	(57,866)
Stock options, expired (in shares)	7,463
Stock options, outstanding as of June 30, 2019 (in shares)	1,491,037
Shares available for future grants and ESPP purchases as of June 30, 2019 (in shares)	629,054

Commitments And Contingencies_2

Commitments And Contingencies (Details) $ in Thousands	Jul. 24, 2019claim	Dec. 15, 2010claim	Jun. 30, 2019USD ($)equipment	Aug. 02, 2016claim	Feb. 16, 2016claim
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of fiscal year			$ 19,473
Unrecorded unconditional purchase obligation, due within two years			9,398
Unrecorded unconditional purchase obligation			$ 28,871
Deepwater Horizon Oil Spill Multi District Litigation
Loss Contingencies [Line Items]
Claims filed | claim		1
Pending claims | claim				11	11
BELO/ORM | Subsequent Event [Member]
Loss Contingencies [Line Items]
Claims filed | claim	2,350
Claims dismissed | claim	219
BELO/NRC | Subsequent Event [Member]
Loss Contingencies [Line Items]
Claims filed | claim	225
Claims dismissed | claim	18
Foreign-flag Rail Ferries
Loss Contingencies [Line Items]
Number of equipment committed to purchase | equipment			2
Inland River Towboat
Loss Contingencies [Line Items]
Number of equipment committed to purchase | equipment			2
Ocean Services
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of fiscal year			$ 1,052
Unrecorded unconditional purchase obligation, due within two years			8,523
Unrecorded unconditional purchase obligation			9,575
Inland Services
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of fiscal year			17,047
Unrecorded unconditional purchase obligation, due within two years			875
Unrecorded unconditional purchase obligation			17,922
Other Segment
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation, due in remainder of fiscal year			1,374
Unrecorded unconditional purchase obligation, due within two years			0
Unrecorded unconditional purchase obligation			$ 1,374

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Operating Revenues	$ 197,023	$ 216,831	$ 406,547	$ 401,655
Costs and Expenses:
Operating	142,871	162,168	289,982	293,945
Administrative and general	26,714	24,311	53,460	50,106
Depreciation and amortization	17,009	18,844	34,145	38,453
Total costs and expenses	186,594	205,323	377,587	382,504
Gains (Losses) on Asset Dispositions, Net	677	506	1,114	7,551
Operating Income (Loss)	11,106	12,014	30,074	26,702
Other Income (Expense):
Foreign currency gains (losses), net	(191)	(1,346)	214	344
Other, net	25	54,311	(619)	54,594
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(312)	1,931	(2,830)	1,094
Income Before Income Tax Expense and Equity in Earnings (Losses) of 50% or Less Owned Companies	20,703	53,929	38,494	60,043
Capital Expenditures			7,750	31,632
Historical cost	1,416,084	1,393,514	1,416,084	1,393,514	$ 1,407,329
Accumulated depreciation	(593,168)	(527,814)	(593,168)	(527,814)	(560,819)
Net property and equipment	822,916	865,700	822,916	865,700	846,510
Operating Lease Right-of-Use Assets	161,518		161,518		0
Investments, at Equity, and Advances to 50% or Less Owned Companies	155,645	150,158	155,645	150,158	156,886
Inventories	5,293	4,690	5,293	4,690	4,530
Goodwill	32,714	32,774	32,714	32,774	32,708
Intangible Assets	22,773	26,898	22,773	26,898	24,551
Other current and long-term assets, excluding cash and near cash assets	219,277	199,439	219,277	199,439
Total Assets	1,603,390	1,655,924	1,603,390	1,655,924	$ 1,471,024
Ocean Services
Segment Reporting Information [Line Items]
Operating Revenues	109,681	105,155	218,953	207,539
Inland Services
Segment Reporting Information [Line Items]
Operating Revenues	61,455	73,409	127,057	129,330
Witt O'Brien's LLC
Segment Reporting Information [Line Items]
Operating Revenues	23,745	37,298	56,590	63,701
Other Segment
Segment Reporting Information [Line Items]
Operating Revenues	2,142	969	3,947	1,085
Intersegment Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(8)	(10)	(106)	(39)
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	(8)	(10)	(106)	(39)
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	109,681	105,155	218,953	207,539
Costs and Expenses:
Operating	71,230	75,044	141,162	140,377
Administrative and general	9,423	10,328	19,621	20,877
Depreciation and amortization	10,230	11,620	20,567	24,265
Total costs and expenses	90,883	96,992	181,350	185,519
Gains (Losses) on Asset Dispositions, Net	349	3	366	1,886
Operating Income (Loss)	19,147	8,166	37,969	23,906
Other Income (Expense):
Foreign currency gains (losses), net	1	(76)	(46)	(127)
Other, net	28	398	(623)	681
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	700	1,267	811	1,582
Segment Profit (Loss)	19,876	9,755	38,111	26,042
Capital Expenditures			542	28,503
Historical cost	930,719	920,908	930,719	920,908
Accumulated depreciation	(361,863)	(320,659)	(361,863)	(320,659)
Net property and equipment	568,856	600,249	568,856	600,249
Operating Lease Right-of-Use Assets	122,292		122,292
Investments, at Equity, and Advances to 50% or Less Owned Companies	77,644	59,527	77,644	59,527
Inventories	1,494	2,172	1,494	2,172
Goodwill	1,852	1,852	1,852	1,852
Intangible Assets	8,301	9,629	8,301	9,629
Other current and long-term assets, excluding cash and near cash assets	56,598	56,888	56,598	56,888
Total Assets	837,037	730,317	837,037	730,317
Operating Segments | Inland Services
Segment Reporting Information [Line Items]
Operating Revenues	61,455	73,409	127,057	129,330
Costs and Expenses:
Operating	54,486	62,361	108,731	110,542
Administrative and general	3,133	3,216	6,489	6,528
Depreciation and amortization	5,699	6,243	11,424	12,477
Total costs and expenses	63,318	71,820	126,644	129,547
Gains (Losses) on Asset Dispositions, Net	330	503	750	5,665
Operating Income (Loss)	(1,533)	2,092	1,163	5,448
Other Income (Expense):
Foreign currency gains (losses), net	(191)	(1,183)	268	520
Other, net	0	14	0	14
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(618)	584	(3,090)	(1,870)
Segment Profit (Loss)	(2,342)	1,507	(1,659)	4,112
Capital Expenditures			6,860	2,917
Historical cost	446,392	436,780	446,392	436,780
Accumulated depreciation	(205,792)	(184,747)	(205,792)	(184,747)
Net property and equipment	240,600	252,033	240,600	252,033
Operating Lease Right-of-Use Assets	34,791		34,791
Investments, at Equity, and Advances to 50% or Less Owned Companies	56,504	64,398	56,504	64,398
Inventories	2,973	2,208	2,973	2,208
Goodwill	2,356	2,416	2,356	2,416
Intangible Assets	8,244	9,738	8,244	9,738
Other current and long-term assets, excluding cash and near cash assets	49,737	73,980	49,737	73,980
Total Assets	395,205	404,773	395,205	404,773
Operating Segments | Witt O'Brien's LLC
Segment Reporting Information [Line Items]
Operating Revenues	23,753	37,308	56,696	63,740
Costs and Expenses:
Operating	15,691	24,399	37,463	42,705
Administrative and general	6,831	5,140	13,233	10,507
Depreciation and amortization	209	491	415	792
Total costs and expenses	22,731	30,030	51,111	54,004
Gains (Losses) on Asset Dispositions, Net	0	0	0	0
Operating Income (Loss)	1,022	7,278	5,585	9,736
Other Income (Expense):
Foreign currency gains (losses), net	0	(17)	0	(15)
Other, net	(2)	0	(5)	0
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(128)	(32)	(195)	103
Segment Profit (Loss)	892	7,229	5,385	9,824
Capital Expenditures			40	0
Historical cost	1,267	1,227	1,267	1,227
Accumulated depreciation	(1,079)	(984)	(1,079)	(984)
Net property and equipment	188	243	188	243
Operating Lease Right-of-Use Assets	877		877
Investments, at Equity, and Advances to 50% or Less Owned Companies	280	589	280	589
Inventories	647	152	647	152
Goodwill	28,506	28,506	28,506	28,506
Intangible Assets	6,228	7,531	6,228	7,531
Other current and long-term assets, excluding cash and near cash assets	91,993	61,035	91,993	61,035
Total Assets	128,719	98,056	128,719	98,056
Operating Segments | Other Segment
Segment Reporting Information [Line Items]
Operating Revenues	2,142	969	3,947	1,085
Costs and Expenses:
Operating	1,472	392	2,725	392
Administrative and general	837	498	1,676	684
Depreciation and amortization	493	62	982	62
Total costs and expenses	2,802	952	5,383	1,138
Gains (Losses) on Asset Dispositions, Net	(2)	0	(2)	0
Operating Income (Loss)	(662)	17	(1,438)	(53)
Other Income (Expense):
Foreign currency gains (losses), net	0	1	0	1
Other, net	0	53,902	0	53,902
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(266)	112	(356)	1,279
Segment Profit (Loss)	(928)	54,032	(1,794)	55,129
Capital Expenditures			308	85
Historical cost	7,574	4,467	7,574	4,467
Accumulated depreciation	(1,472)	(62)	(1,472)	(62)
Net property and equipment	6,102	4,405	6,102	4,405
Operating Lease Right-of-Use Assets	0		0
Investments, at Equity, and Advances to 50% or Less Owned Companies	21,217	25,644	21,217	25,644
Inventories	179	158	179	158
Goodwill	0	0	0	0
Intangible Assets	0	0	0	0
Other current and long-term assets, excluding cash and near cash assets	3,630	2,789	3,630	2,789
Total Assets	31,128	32,996	31,128	32,996
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues			(106)	(39)
Costs and Expenses:
Operating	(8)	(28)	(99)	(71)
Administrative and general	6,490	5,129	12,441	11,510
Depreciation and amortization	378	428	757	857
Total costs and expenses	6,860	5,529	13,099	12,296
Gains (Losses) on Asset Dispositions, Net	0	0	0	0
Operating Income (Loss)	(6,868)	(5,539)	(13,205)	(12,335)
Other Income (Expense):
Foreign currency gains (losses), net	(1)	(71)	(8)	(35)
Other, net	(1)	(3)	9	(3)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Capital Expenditures			0	127
Historical cost	30,132	30,132	30,132	30,132
Accumulated depreciation	(22,962)	(21,362)	(22,962)	(21,362)
Net property and equipment	7,170	8,770	7,170	8,770
Operating Lease Right-of-Use Assets	3,558		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	17,319	4,747	17,319	4,747
Segment Reconciling Items
Other Income (Expense):
Other, net	9,763	(11,050)	8,825	(21,597)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	312	(1,931)	2,830	(1,094)
Cash and near cash assets	$ 183,254	$ 376,265	$ 183,254	$ 376,265

Segment Information - Revenues

Segment Information - Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Time charter, bareboat charter and rental income			$ 112,156	$ 96,537
Operating Revenues	$ 197,023	$ 216,831	406,547	401,655
Voyage Charters
Revenues from contracts with customers			25,729	41,258
Contracts of Affreightment
Revenues from contracts with customers			105,442	104,168
Tariff
Revenues from contracts with customers			41,962	36,540
Unit Freight
Revenues from contracts with customers			32,312	27,579
Terminal Operations
Revenues from contracts with customers			8,604	11,814
Fleeting Operations
Revenues from contracts with customers			7,967	8,952
Logistics Services
Revenues from contracts with customers			8,113	6,214
Time and Material Contracts
Revenues from contracts with customers			50,586	58,031
Retainer Contracts
Revenues from contracts with customers			4,802	4,742
Product Sales
Revenues from contracts with customers			2,887	610
Other
Revenues from contracts with customers			5,987	5,210
Ocean Services
Operating Revenues	109,681	105,155	218,953	207,539
Inland Services
Operating Revenues	61,455	73,409	127,057	129,330
Witt O'Brien's LLC
Operating Revenues	23,745	37,298	56,590	63,701
Other Segment
Operating Revenues	2,142	969	3,947	1,085
Operating Segments | Ocean Services
Time charter, bareboat charter and rental income			106,381	92,800
Operating Revenues	109,681	105,155	218,953	207,539
Operating Segments | Ocean Services | Voyage Charters
Revenues from contracts with customers			25,729	41,258
Operating Segments | Ocean Services | Contracts of Affreightment
Revenues from contracts with customers			10,647	7,865
Operating Segments | Ocean Services | Tariff
Revenues from contracts with customers			41,962	36,540
Operating Segments | Ocean Services | Unit Freight
Revenues from contracts with customers			32,312	27,579
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			1,922	1,497
Operating Segments | Inland Services
Time charter, bareboat charter and rental income			5,299	3,678
Operating Revenues	61,455	73,409	127,057	129,330
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			94,795	96,303
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			8,604	11,814
Operating Segments | Inland Services | Fleeting Operations
Revenues from contracts with customers			7,967	8,952
Operating Segments | Inland Services | Logistics Services
Revenues from contracts with customers			8,113	6,214
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			2,279	2,369
Operating Segments | Witt O'Brien's LLC
Time charter, bareboat charter and rental income			0	0
Operating Revenues	23,753	37,308	56,696	63,740
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			50,586	58,031
Operating Segments | Witt O'Brien's LLC | Retainer Contracts
Revenues from contracts with customers			4,802	4,742
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			1,308	967
Operating Segments | Other Segment
Time charter, bareboat charter and rental income			476	59
Operating Revenues	$ 2,142	$ 969	3,947	1,085
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			2,887	610
Cost of goods sold			2,400	300
Operating Segments | Other Segment | Other
Revenues from contracts with customers			584	416
Corporate And Eliminations
Time charter, bareboat charter and rental income			0	0
Operating Revenues			(106)	(39)
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			$ (106)	$ (39)

Uncategorized Items - ckh-06302

Label	Element	Value
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 750,894,000
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	387,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	390,000
Treasury Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(1,366,773,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(1,368,300,000)
AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(914,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(545,000)
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1,573,013,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1,596,642,000
Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	159,524,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	129,678,000
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	490,332,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	416,661,000
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