Seacor (CKH) 10-Q 29 Jul 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 24, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	SEACOR HOLDINGS INC /NEW/
Entity Central Index Key	859,598
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		17,905,613
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 433,827	$ 434,183
Restricted cash	0	16,435
Marketable securities	29,411	58,004
Receivables:
Trade, net of allowance for doubtful accounts	181,733	225,242
Other Receivables	48,627	67,745
Inventories	19,736	22,783
Prepaid expenses and other	11,411	9,011
Total current assets	724,745	833,403
Property and Equipment:
Property, Plant and Equipment, Gross	2,100,309	2,086,957
Accumulated depreciation	954,931	902,284
Property, Plant and Equipment, Other, Net in Service	1,145,378	1,184,673
Construction in progress	399,033	318,000
Net property and equipment	1,544,411	1,502,673
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	482,302	484,157
Construction Reserve Funds & Title XI Reserve Funds	275,131	278,022
Goodwill	62,686	62,759
Intangible Assets, Net	30,742	32,727
Other Assets	57,463	51,292
Total assets	3,177,480	3,245,033
Current Liabilities:
Current portion of long-term debt	35,270	48,499
Accounts payable and accrued expenses	68,832	103,760
Other current liabilities	118,330	119,694
Total current liabilities	222,432	271,953
Long-Term Debt	889,323	834,383
Deferred Income Taxes	420,531	432,546
Other Liabilities, Noncurrent	172,018	188,664
Total liabilities	1,704,304	1,727,546
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; 37,660,827 and 37,505,843 shares issued in 2015 and 2014, respectively	377	375
Additional paid-in capital	1,499,904	1,490,698
Retained earnings	1,176,520	1,195,402
Shares held in Treasury of 19,419,459 and 19,365,716 in 2015 and 2014, respectively, at cost	1,305,104	1,283,476
Accumulated Other Comprehensive Loss, Net of Tax	(3,172)	(3,505)
Stockholders' equity attributable to parent, total	1,368,525	1,399,494
Noncontrolling interests in subsidiaries	104,651	117,993
Total equity	1,473,176	1,517,487
Liabilities and stockholders' equity, total	$ 3,177,480	$ 3,245,033

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Trade receivables, allowance for doubtful accounts	$ 2,674	$ 3,162
Common Stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,682,746	37,505,843
Treasury stock, shares held in treasury	19,670,332	19,365,716
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Operating Revenues	$ 281,609	$ 328,224	$ 542,253	$ 638,241
Costs and Expenses [Abstract]
Operating	207,743	231,906	406,891	450,882
Administrative and general	38,674	34,686	77,561	72,763
Depreciation and amortization	32,079	33,220	63,509	66,612
Total costs and expenses	278,496	299,812	547,961	590,257
Gains (Losses) on Assets Dispositions and Impairments, Net	4,386	4,295	(460)	8,973
Operating Income (Loss)	7,499	32,707	(6,168)	56,957
Other Income (Expense):
Interest income	4,474	6,030	9,053	10,073
Interest expense	10,391	10,458	20,903	21,861
Debt extinguishment losses	(29,536)	0	(29,536)	0
Marketable security gains, net	10,249	731	1,128	5,801
Derivative gains (losses), net	1,426	94	(1,570)	(143)
Foreign currency gains, net	2,436	1,720	443	1,521
Other, net	4,433	10,213	4,389	6,558
Total Other Nonoperating Income (Expense)	(16,909)	8,330	(36,996)	1,949
Income (Loss) Before Income Tax Expense (Benefit) and Equity in Earnings (Losses) of 50% or Less Owned Companies	(9,410)	41,037	(43,164)	58,906
Income Tax Expense (Benefit)	155	13,000	(11,799)	19,375
Income (Loss) Before Equity in Earnings (Losses) of 50% or Less Owned Companies	(9,565)	28,037	(31,365)	39,531
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	1,064	(512)	4,963	1,709
Net Income (Loss)	(8,501)	27,525	(26,402)	41,240
Net Loss Attributable to Noncontrolling Interest	(9,188)	6,458	(7,520)	8,664
Net Income (Loss) attributable to SEACOR Holdings Inc.	$ 687	$ 21,067	$ (18,882)	$ 32,576
Earnings Per Share, Basic	$ 0.04	$ 1.05	$ (1.06)	$ 1.62
Earnings Per Share, Diluted	$ 0.04	$ 0.98	$ (1.06)	$ 1.58
Weighted Average Common Shares Outstanding:
Basic	17,780,759	19,989,402	17,779,250	20,049,056
Weighted Average Number of Shares Outstanding, Diluted	18,082,464	24,584,494	17,779,250	24,665,869

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (8,501)	$ 27,525	$ (26,402)	$ 41,240
Foreign Currency translation gain (losses)	4,289	1,826	555	2,238
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	(11)	0	(11)
Derivative losses on cash flow hedges	(288)	50	(685)	(23)
Reclassification of derivative losses on cash flow hedges to equity in earnings of 50% or less owned companies	563	102	711	215
Other Comprehensive Income (Loss), before Tax	4,564	1,967	581	2,419
Income tax (expense) benefit	(1,434)	(621)	(179)	(763)
Other Comprehensive Income (Loss), Net of Tax	3,130	1,346	402	1,656
Comprehensive Income (Loss)	(5,371)	28,871	(26,000)	42,896
Comprehensive Income attributable to Noncontrolling Interests in subsidiaries	(8,723)	6,650	(7,451)	8,903
Comprehensive Income (Loss) attributable to SEACOR Holdings Inc.	$ 3,352	$ 22,221	$ (18,549)	$ 33,993

Condensed Consolidated Stateme6

Condensed Consolidated Statement Of Changes In Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Shares Held In Treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interests In Subsidiaries [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total equity	$ 1,517,487	$ 375	$ 1,490,698	$ 1,195,402	$ (1,283,476)	$ (3,505)	$ 117,993
Employee Stock Purchase Plan	1,261	0	0	0	1,261	0	0
Exercise of stock options	1,992	1	1,991	0	0	0	0
Director stock awards	118	0	118	0	0	0	0
Restricted stock	(102)	1	(103)	0	0	0	0
Purchases of treasury shares	(22,889)	0	0	0	(22,889)	0	0
Amortization of share awards	7,200	0	7,200	0	0	0	0
Disposition of subsidiary with noncontrolling interests	(1,578)	0	0	0	0	0	(1,578)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	400	0	0	0	0	0	400
Dividends paid to noncontrolling interests	(4,713)	0	0	0	0	0	(4,713)
Comprehensive income:
Net loss attributable to SEACOR Holdings Inc.	(18,882)	0	0	(18,882)	0	0
Net Loss Attributable to Noncontrolling Interest	(7,520)						(7,520)
Net Loss	(26,402)
Other comprehensive loss	402	0	0	0	0	333	69
Total equity	$ 1,473,176	$ 377	$ 1,499,904	$ 1,176,520	$ (1,305,104)	$ (3,172)	$ 104,651

Condensed Consolidated Stateme7

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Cash Flows [Abstract]
Net Cash Provided by Operating Activities	$ 98,539	$ 107,866
Cash Flows from Investing Activities
Purchases of property and equipment	132,128	273,669
Proceeds from disposition of property and equipment	22,686	78,039
Investments in and advances to 50% or less owned companies	28,605	21,464
Return of investments and advances from 50% or less owned companies	40,529	10,013
Issuances of third party leases and notes receivable, net	(2,451)	(6,377)
Net (increase) decrease in restricted cash	(16,435)	2,171
Net (increase) decrease in construction reserve funds and title XI reserve funds	(2,891)	63,117
Net cash used in investing activities	(80,643)	(278,746)
Cash Flows from Financing Activities
Payments on long-term debt and capital lease obligations	128,001	7,226
Net repayments on inventory financing arrangements	(2,661)	(6,294)
Proceeds from issuance of long term debt, net of issue costs	136,585	6
Common stock acquired for treasury	22,889	39,221
Proceeds and tax benefits from share award plans	3,149	6,288
Issuance of noncontrolling interests, net of issue costs	400	145,116
Purchase of subsidiary shares from noncontrolling interests	0	2,090
Dividends paid to noncontrolling interests	(4,713)	(792)
Net cash provided by (used in) financing activities	(18,130)	95,787
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(122)	1,073
Net Decrease in Cash and Cash Equivalents	(356)	(74,020)
Cash and Cash Equivalents, Beginning of Period	434,183	527,435
Cash and Cash Equivalents, End of Period	$ 433,827	$ 453,415

Basis of Presentation and Accou

Basis of Presentation and Accounting Policy	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policy	BASIS OF PRESENTATION AND ACCOUNTING POLICIES The condensed consolidated financial information for the three and six months ended June 30 , 2015 and 2014 has been prepared by the Company and has not been audited by its independent registered 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, 2015 , its results of operations for the three and six months ended June 30 , 2015 and 2014 , its comprehensive income (loss) for the three and six months ended June 30 , 2015 and 2014 , its changes in equity for the six months ended June 30 , 2015 , and its cash flows for the six months ended June 30 , 2015 and 2014 . 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, 2014 . 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. 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, 2014 . Revenue Recognition. The Company recognizes revenue when it is realized or realizable and earned. Revenue is realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue that does not meet these criteria is deferred until the criteria are met. As of June 30, 2015 , deferred revenues of $6.8 million , included in other current liabilities, related to the time charter of several offshore support vessels scheduled to be paid through the conveyance of an overriding royalty interest (the "Conveyance") in developmental oil and gas producing properties operated by a customer in the U.S. Gulf of Mexico. Payments under the Conveyance, and the timing of such payments, were contingent upon production and energy sale prices. On August 17, 2012, the customer filed a voluntary petition for chapter 11 bankruptcy, which was converted to chapter 7 in June 2014. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to August 17, 2012 and during the 90 days prior to the filing are subject to bankruptcy court approval. The Company will recognize revenues when legally permissible as provided under the bankruptcy court rules. All costs and expenses related to these charters were recognized as incurred. 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 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, 2015 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off ("RORO"). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings 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. 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 , 2015 , capitalized interest totaled $9.6 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. If the carrying value of the assets is not recoverable, as determined by the estimated undiscounted cash flows, the carrying value of the assets is reduced to fair value. 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 , 2015 and 2014 , the Company recognized impairment charges of $6.6 million and $3.9 million , respectively, related to long-lived assets held for use. Income Taxes. During the three and six months ended June 30 , 2015 , the Company's effective tax rates of negative 1.6% and 27.3% , respectively, were primarily due to tax benefits not recognized on losses attributable to noncontrolling interests (see Note 9). 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): 2015 2014 Balance at beginning of period $ 159,911 $ 124,763 Adjustments to deferred gains arising from asset sales 2,035 40,445 Amortization of deferred gains included in operating expenses as a reduction to rental expense (11,273 ) (7,155 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (4,597 ) (2,656 ) Balance at end of period $ 146,076 $ 155,397 Accumulated Other Comprehensive Loss. The components of accumulated other comprehensive loss were as follows: SEACOR Holdings Inc. Stockholders' Equity Noncontrolling Interests Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Total Foreign Currency Translation Adjustments Other Other Comprehensive Income December 31, 2014 $ (3,494 ) $ (16 ) $ 5 $ (3,505 ) $ (86 ) $ 3 Other comprehensive income 486 26 — 512 69 — $ 581 Income tax expense (170 ) (9 ) — (179 ) — — (179 ) Six months ended June 30, 2015 $ (3,178 ) $ 1 $ 5 $ (3,172 ) $ (17 ) $ 3 $ 402 Earnings (Loss) Per Share. Basic earnings (loss) per common share of SEACOR are computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings (loss) per common share of SEACOR are 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 (loss) 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 (Loss) Attributable to SEACOR Average O/S Shares Per Share 2015 Basic Weighted Average Common Shares Outstanding $ 687 17,780,759 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 301,705 — — Convertible Notes (2)(3) — — — — Diluted Weighted Average Common Shares Outstanding $ 687 18,082,464 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) 2014 Basic Weighted Average Common Shares Outstanding $ 21,067 19,989,402 $ 1.05 $ 32,576 20,049,056 $ 1.62 Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 394,567 — 416,288 Convertible Notes (2) 3,148 4,200,525 6,287 4,200,525 Diluted Weighted Average Common Shares Outstanding $ 24,215 24,584,494 $ 0.98 $ 38,863 24,665,869 $ 1.58 ______________________ (1) For the three months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 685,645 and 365,398 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the six months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 2,017,788 and 288,510 , 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 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 1,825,326 common shares issuable pursuant to the Company's 3.0% 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 , 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company's 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. New Accounting Pronouncements. On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued a comprehensive new revenue recognition standard that will supersede nearly all existing revenue recognition guidance under generally accepted accounting principles in the United States. The core principal of the new standard is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard is effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted. The Company has not yet selected the method of adoption or 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 February 18, 2015, the FASB issued an accounting standard update that amends the guidance for evaluating whether to consolidate certain legal entities. Specifically, the accounting standard update modifies the method for determining whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities. Further, it eliminates the presumption that a general partner should consolidate a limited partnership and impacts the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The accounting standard update is effective for annual and interim periods beginning after December 15, 2015 and early adoption permitted. The Company has not yet determined what impact, if any, the adoption of the accounting standard update will have on its consolidated financial position, results of operations or cash flows. On April 7, 2015, the FASB issued final guidance to simplify the presentation of debt issuance costs by requiring debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the debt liability rather than as an asset. The recognition and measurement guidance for debt issuance costs have not changed. The new standard requires retrospective application and represents a change in accounting principle. The final guidance is effective for annual and interim periods beginning after December 15, 2015 and early adoption is permitted. As of June 30, 2015 , the Company had $12.6 million of debt issuance costs included in other assets in the accompanying condensed consolidated balance sheets.

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Business Acquisitions	BUSINESS ACQUISITIONS Witt O'Brien's. On July 11, 2014, the Company acquired a controlling interest in Witt O'Brien's, a global leader in preparedness, crisis management, and disaster response and recovery, through the acquisition of its partner's 45.8% equity interest for $35.4 million . The Company performed a fair value analysis and the purchase price was allocated to the acquired assets and liabilities based on their fair values resulting in $45.0 million of goodwill being recorded. The preliminary fair value analysis is pending completion of a final valuation for the acquired assets and liabilities.

Equipment Acquisitions, Disposi

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies	6 Months Ended
	Jun. 30, 2015
Equipment Acquisitions, Dispositions And Depreciation And Impairment Policies [Abstract]
Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies	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 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, 2015 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off ("RORO"). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings 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. 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 , 2015 , capitalized interest totaled $9.6 million . EQUIPMENT ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS During the six months ended June 30 , 2015 , capital expenditures were $132.1 million . Equipment deliveries during the six months ended June 30 , 2015 included one fast support vessel, one supply vessel, one wind farm utility vessel and two inland river towboats. During the six months ended June 30 , 2015 , the Company sold two offshore support vessels, one 10,000 barrel inland river tank barge, twelve inland river deck barges and other property and equipment for net proceeds of $24.7 million , ( $22.7 million in cash and $2.0 million in seller financing) and gains of $3.6 million , of which $1.6 million were recognized currently and $2.0 million were deferred. In addition, the Company recognized previously deferred gains of $4.6 million . During the six months ended June 30 , 2015 , the Company recognized impairment charges of $6.6 million related to the suspended construction of two offshore support vessels.

Investments, At Equity, And Adv

Investments, At Equity, And Advances To 50% Or Less Owned Companies	6 Months Ended
	Jun. 30, 2015
Equity Method Investment, Summarized Financial Information [Abstract]
Investments, At Equity, And Advances To 50% Or Less Owned Companies	INVESTMENTS, AT EQUITY, AND ADVANCES TO 50% OR LESS OWNED COMPANIES MexMar. MexMar operates offshore support vessels in Mexico. During the six months ended June 30 , 2015 , the Company and its partner each contributed additional capital of $7.9 million in cash to MexMar. In addition, during the six months ended June 30 , 2015 , MexMar repaid $15.0 million of seller financing provided by the Company. OSV Partners. OSV Partners owns and operates five offshore support vessels. During the six months ended June 30 , 2015 , the Company contributed additional capital of $1.4 million in cash to OSV Partners. During the six months ended June 30 , 2015 , the Company sold one offshore support vessel for $14.3 million to OSV Partners. Falcon Global. On August 1, 2014, the Company and Montco Global, LLC formed Falcon Global LLC ("Falcon Global") to construct and operate foreign-flag liftboats. The Company has a 50% ownership interest in Falcon Global. During the six months ended June 30 , 2015 , the Company and its partner each contributed additional capital of $9.9 million in cash to Falcon Global. SCFCo. SCFCo was established to operate towboats and dry-cargo barges on the Parana-Paraguay Rivers in South America and a terminal facility at Port Ibicuy, Argentina. During the six months ended June 30 , 2015 , the Company and its partner each contributed additional capital of $3.0 million in cash to SCFCo. As of June 30, 2015 , the Company had outstanding loans and working capital advances to SCFCo Holdings of $31.7 million . Bunge-SCF Grain. Bunge-SCF Grain operates a terminal grain elevator in Fairmont City, Illinois. During the six months ended June 30 , 2015 , Bunge-SCF Grain repaid $2.0 million of working capital advances to the Company. As of June 30, 2015 , the total balance of working capital advances outstanding was $7.0 million . SCF Bunge Marine. SCF Bunge Marine provides towing services on the U.S. Inland River Waterways, primarily the Mississippi River, Illinois River and Ohio River. During the six months ended June 30 , 2015 , the Company received dividends of $2.5 million from SCF Bunge Marine. Dorian. Dorian owns and operates foreign-flag VLGC's servicing the international Liquefied Petroleum Trade. During the six months ended June 30 , 2015 , the Company sold 150,000 shares of Dorian for $2.3 million in cash reducing the Company's ownership to 15.88% . As of June 30, 2015 , the Company's carrying value of its investment in Dorian was $140.7 million and its fair value was $153.1 million based on the quoted market price. Trailer Bridge. Trailer Bridge is an operator of U.S.-flag deck and RORO barges offering transportation services between Jacksonville, Florida, San Juan, Puerto Rico and Puerto Plata, Dominican Republic. During the six months ended June 30 , 2015 , Trailer Bridge repaid $15.5 million of bridge financing provided by the Company. SEA-Access. SEA-Access owns and operates a U.S.-flag crude tanker. During the six months ended June 30 , 2015 , the Company received dividends of $3.9 million and capital distributions of $2.9 million from SEA-Access. SeaJon. SeaJon owns an articulated tug-barge operating in the Great Lakes trade. During the six months ended June 30 , 2015 , the Company received dividends of $0.6 million from SeaJon. SeaJon II. SeaJon II owns a U.S.-flag offshore tug on time charter to Trailer Bridge. During the six months ended June 30 , 2015 , the Company and its partner each contributed additional capital of $1.0 million in cash to SeaJon II. Avion. Avion is a distributor of aircraft and aircraft related parts. During the six months ended June 30 , 2015 , Avion repaid $3.0 million of loans provided by the Company. As of June 30, 2015 , the Company had no outstanding loans to Avion. VA&E. On June 1, 2015, the Company contributed its 81.1% interest in the assets and liabilities of a previously controlled and consolidated subsidiary that operated its agricultural commodity trading and logistics business (including $3.5 million of cash on hand) in exchange for a 41.3% ownership interest in each of VA&E Trading USA LLC and VA&E Trading LLP (collectively "VA&E"), two newly formed 50% or less owned companies with certain subsidiaries of Ecom Agroindustrial Corp. Ltd. and certain managers of 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. As a consequence of the change in control, the Company recognized equity in earnings of 50% or less owned companies of $0.1 million , net of tax, related to marking its investments in VA&E to fair value. In addition, the Company provides an unsecured revolving credit facility to VA&E for up to $6.0 million . During the six months ended June 30 , 2015 , VA&E borrowed $1.8 million and repaid $2.0 million on the revolving credit facility. As of June 30, 2015 , the outstanding balance on the revolving credit facility was $1.2 million . Guarantees. The Company has guaranteed the payment of amounts owed under a vessel charter by one of its 50% or less owned companies, a construction contract for one of its 50% or less owned companies and amounts owed under banking facilities by certain of its 50% or less owned companies. As of June 30, 2015 , the total amount guaranteed by the Company under these arrangements was $91.3 million . In addition, as of June 30, 2015 , the Company had uncalled capital commitments to two of its 50% or less owned companies totaling $1.4 million .

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES As of June 30, 2015 , the Company's unfunded capital commitments were $432.8 million and included: $142.3 million for 17 offshore support vessels; $1.7 million for two 30,000 barrel inland river liquid tank barges; $6.9 million for eight 10,000 barrel inland river liquid tank barges; $6.8 million for three inland river towboats; $190.3 million for three U.S.-flag product tankers; $41.9 million for one U.S.-flag articulated tug-barge; $20.5 million for two U.S.-flag harbor tugs; and $22.4 million for other equipment and improvements. These commitments are payable as follows: $135.9 million is payable during the remainder of 2015 (including $64.8 million for the construction of SEA-Vista's three U.S.-flag product tankers and one U.S.-flag articulated tug-barge); $233.2 million is payable during 2016 (including $146.9 million for the construction of SEA-Vista's three U.S.-flag product tankers and one U.S.-flag articulated tug-barge); $38.8 million is payable during 2017 (including $20.5 million for the construction of SEA-Vista's three U.S.-flag product tankers); $19.0 million is payable during 2018 ; and $5.9 million is payable during 2019 . Of these commitments, approximately $6.8 million may be terminated without further liability other than the payment of liquidated damages of $0.7 million . On July 20, 2010, two individuals purporting to represent a class commenced a civil action in the Civil District Court for the Parish of Orleans in the State of Louisiana, John Wunstell, Jr. and Kelly Blanchard v. BP, et al. , No. 2010-7437 (Division K) (the “ Wunstell Action”), in which they assert, among other theories, that Mr. Wunstell suffered injuries as a result of his exposure to certain noxious fumes and chemicals in connection with the provision of remediation, containment and response services by ORM during the Deepwater Horizon oil spill response and clean-up in the U.S. Gulf of Mexico. The action now is part of the overall multi-district litigation, In re Oil Spill by the Oil Rig " Deepwater Horizon ", MDL No. 2179 filed in the U.S. District Court for the Eastern District of Louisiana ("MDL"). The complaint also seeks to establish a “class-wide court-supervised medical monitoring program” for all individuals “participating in BP's Deepwater Horizon Vessels of Opportunity Program and/or Horizon Response Program” who allegedly experienced injuries similar to those of Mr. Wunstell. The Company believes this lawsuit has no merit and will continue to vigorously defend the action and pursuant to contractual agreements with the responsible party, the responsible party has agreed, subject to certain potential limitations, to indemnify and defend ORM in connection with the Wunstell Action and claims asserted in the MDL, discussed further below. Although the Company is unable to estimate the potential exposure, if any, resulting from this matter, the Company does not expect it will have a material effect on the Company's consolidated financial position, results of operations or cash flows. On December 15, 2010, NRC, a subsidiary of the Company prior to the SES Business Transaction, and ORM were named as defendants in one of the several consolidated “master complaints” that have been filed in the overall MDL. The “B3” master complaint naming ORM and NRC asserts various claims on behalf of a putative class against multiple defendants concerning the clean-up activities generally, and the use of dispersants specifically. By court order, the Wunstell Action has been stayed as a result of the filing of the referenced master complaint. The Company believes that the claims asserted against ORM and NRC in the master complaint have no merit and on February 28, 2011, ORM and NRC moved to dismiss all claims against them in the master complaint on legal grounds. On September 30, 2011, the Court granted in part and denied in part the motion to dismiss that ORM and NRC had filed (an amended decision was issued on October 4, 2011 that corrected several grammatical errors and non-substantive oversights in the original order). Although the Court refused to dismiss the referenced master complaint in its entirety at that time, the Court did recognize the validity of the “derivative immunity” and “implied preemption” arguments that ORM and NRC advanced and directed ORM and NRC to (i) conduct limited discovery to develop evidence to support those arguments and (ii) then re-assert the arguments. The Court did, however, dismiss all state-law claims and certain other claims that had been asserted in the referenced master complaint, and dismissed the claims of all plaintiffs that have failed to allege a legally-sufficient injury. A schedule for limited discovery and motion practice was established by the Court and, in accordance with that schedule, ORM and NRC filed for summary judgment re-asserting their derivative immunity and implied preemption arguments on May 18, 2012. Those motions were argued on July 13, 2012 and are still pending decision. On July 17, 2014, the Court issued a pretrial order that established a protocol for disclosures clarifying the basis for the “B3” claims asserted against the Clean-Up Responder Defendants, including ORM and NRC, in the MDL. Under this protocol, Plaintiffs who satisfy certain criteria and believe they have specific evidence in support of their claims, including that any Clean-Up Responder Defendant(s) failed to act pursuant to the authority and direction of the federal government in conducting Deepwater Horizon oil spill remediation and clean-up operations, had to submit a sworn statement or face dismissal. Plaintiffs’ deadline to serve such sworn statements in support of their claims was September 22, 2014, with the exception of several Plaintiffs who were granted an extension until October 10, 2014. On November 14, 2014, the Clean-Up Responder Defendants and the Plaintiffs’ Steering Committee in the MDL submitted a joint report to the Court regarding claimants’ compliance with the pretrial order. In this joint report, the parties (i) explained how they complied with the notice requirements of Court’s July 17, 2014 pretrial order, (ii) noted that they had received 102 sworn statements in connection with this pretrial order, and (iii) provided the Court with an assessment of the sworn statements received. An additional sworn statement was received after the joint report was submitted. Procedures and next steps in connection with the “B3” claims will now be addressed by the Court. In addition to the indemnity provided to ORM, pursuant to contractual agreements with the responsible party, the responsible party has agreed, subject to certain potential limitations, to indemnify and defend ORM and NRC in connection with these claims in the MDL. Although the Company is unable to estimate the potential exposure, if any, resulting from this matter, the Company does not expect it will have a material effect on the Company's consolidated financial position, results of operations or cash flows. Subsequent to the filing of the referenced master complaint, ten additional individual civil actions have been filed in or removed to the U.S. District Court for the Eastern District of Louisiana concerning the clean-up activities generally, which name the Company, ORM and/or NRC as defendants or third-party defendants and are part of the overall MDL. By court order, all of these additional individuals' cases have been stayed until further notice. On April 8, 2011, ORM was named as a defendant in Johnson Bros. Corporation of Louisiana v. BP, PLC, et al. , No. 2:11-CV-00781 (E.D. La.), which is a suit by an individual business seeking damages allegedly caused by a delay on a construction project alleged to have resulted from the clean-up operations. On April 13, 2011, the Company was named as a defendant in Mason v. Seacor Marine, LLC , No. 2:11-CV-00826 (E.D. La.), an action in which plaintiff, a former employee, alleges sustaining personal injuries in connection with responding to the explosion and fire, but also in the months thereafter in connection with the clean-up of oil and dispersants while a member of the crew of the M/V Seacor Vanguard . Although the case was subject to the MDL Court’s stay of individual proceedings, the employee moved to sever his case from the MDL on July 16, 2012, which the Court denied on March 5, 2013. The employee filed a motion asking the Court to reconsider, which was denied on May 3, 2013, and the employee filed a Notice of Appeal to the U.S. Court of Appeals for the Fifth Circuit (“Fifth Circuit”) on May 22, 2013. On July 24, 2013, the Company filed a motion to dismiss for lack of appellate jurisdiction, which was granted on August 16, 2013. The same Company employee has also brought a claim in the M/V Seacor Vanguard vessel’s limitation action in the MDL which relates to any actions that may have been taken by vessels owned by the Company to extinguish the fire. On October 20, 2014, the Company moved for summary judgment, seeking dismissal with prejudice of all of the Company employee’s claims in the MDL in light of the Court’s prior rulings. On May 22, 2015, the employee filed an opposition to the Company's motion as well as a motion to be recognized as an opt-out plaintiff or extend the opt-out deadline in connection with the below-referenced Medical Settlement, and on May 29, 2015, the Company filed a reply brief in further support of its motion. On June 10, 2015, the Court granted the Company's motion for summary judgment, dismissing all of the employee's claims against the Company and/or the M/V Seacor Vanguard with prejudice, and denied the employee's May 22, 2015 motion regarding his opt-out position in connection with the Medical Settlement. Final judgments for all of the employee's claims were issued by the Court on June 17, 2015, and the employee filed his Notice of Appeal on July 7, 2015. On April 15, 2011, ORM and NRC were named as defendants in James and Krista Pearson v. BP Exploration & Production, Inc. ("BP Exploration"), et al. , No. 2:11-CV-00863 (E.D. La.), which is a suit by a husband and wife who allegedly participated in the clean-up effort and are seeking damages for personal injury, property damage to their boat, and amounts allegedly due under contract. On April 15, 2011, ORM and NRC were named as defendants in Thomas Edward Black v. BP Exploration, et al. , No. 2:11-CV-00867 (E.D. La.), which is a suit by an individual who is seeking damages for lost income because he allegedly could not find work in the fishing industry after the oil spill. On April 20, 2011, a complaint was filed in Darnell Alexander, et al. v. BP, PLC, et al. , No. 2:11-CV-00951 (E.D. La.) on behalf of 117 individual plaintiffs that sought to adopt the allegations made in the referenced master complaint against ORM and NRC (and the other defendants). Plaintiffs in this matter have since been granted leave to amend their complaint to include 410 additional individual plaintiffs. On October 3, 2012, ORM and NRC were served with a Rule 14(c) Third-Party Complaint by Jambon Supplier II, L.L.C. and Jambon Marine Holdings L.L.C. in their Limitation of Liability action, In the Matter of Jambon Supplier II, L.L.C., et al. , No. 2:12-CV-00426 (E.D. La.). This Third-Party Complaint alleges that if claimant David Dinwiddie, who served as a clean-up crewmember aboard the M/V JAMBON SUPPLIER II vessel during the clean-up efforts, was injured as a result of his exposure to dispersants and chemicals during the course and scope of his employment, then said injuries were caused by the third-party defendants. On November 25, 2012, ORM was named as a defendant in Victoria Sanchez v. American Pollution Control Corp. et al. , No. 2:12-CV-00164 (E.D. La.), a maritime suit filed by an individual who allegedly participated in the clean-up effort and sustained personal injuries during the course of such employment. On December 17, 2012, the Court unsealed a False Claims Act lawsuit naming ORM as a defendant, Dillon v. BP, PLC et al. , No. 2:12-CV-00987 (E.D. La.), which is a suit by an individual seeking damages and penalties arising from alleged false reports and claims made to the federal government with respect to the amount of oil burned and dispersed during the clean-up. The federal government has declined to intervene in this suit. 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.), 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. Finally, on April 17, 2013, ORM was named as a defendant in Danos et al. v. BP America Production Co. et al. , No. 2:13-CV-03747 (removed to E.D. La.), which is a suit by eight individuals seeking damages for dispersant exposure either as a result of their work during clean-up operations or as a result of their residence in the Gulf. The Company is unable to estimate the potential exposure, if any, resulting from these matters but believes they are without merit and does not expect that they will have a material effect on its consolidated financial position, results of operations or cash flows. 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 referenced master complaint that have already been asserted against ORM and NRC. Transocean, Cameron International Corporation (“Cameron”), Halliburton Energy Services, Inc., and M-I L.L.C. (“M-I”) also filed cross-claims against ORM and NRC for contribution and tort indemnity should they be found liable for any damages in Transocean's Limitation of Liability Act action and ORM and NRC asserted counterclaims against those same parties for identical relief. Weatherford U.S., L.P. and Weatherford International, Inc. (collectively “Weatherford”) had also filed cross-claims against ORM and NRC, but moved to voluntarily dismiss these cross-claims without prejudice on February 8, 2013. The Court granted Weatherford's motion that same day. Transocean's limitation action, and thus the remainder of the aforementioned cross-claims, remains pending, although the Court has found Cameron and M-I to be not liable in connection with the Deepwater Horizon incident and resultant oil spill and dismissed these parties from the MDL. As indicated above, the Company is unable to estimate the potential exposure, if any, resulting from these actions but believes they are without merit and does not expect that these matters will have a material effect on its consolidated financial position, results of operations or cash flows. On November 16, 2012, 668 individuals who served as beach clean-up workers in Escambia County, Florida during the Deepwater Horizon oil spill response commenced a civil action in the Circuit Court for the First Judicial Circuit of Florida, in and for Escambia County, Abney et al. v. Plant Performance Services, LLC et al. , No. 2012-CA-002947, in which they allege, among other things, that ORM and other defendants engaged in the contamination of Florida waters and beaches in violation of Florida Statutes Chapter 376 and injured the plaintiffs by exposing them to dispersants during the course and scope of their employment. The case was removed to the U.S. District Court for the Northern District of Florida on January 13, 2013, Abney et al. v. Plant Performance Services, LLC et al. , No. 3:13-CV-00024 (N.D. Fla.), and on January 16, 2013, the United States Judicial Panel on Multidistrict Litigation (“JPML”) issued a Conditional Transfer Order (“CTO”) transferring the case to the MDL, subject to any timely-filed notice of objection from the plaintiffs. Upon receipt of a notice of objection from the plaintiffs, a briefing schedule was set by the JPML, and so a stay of proceedings and suspension of deadlines was sought and obtained by the Court in the U.S. District Court for the Northern District of Florida. Following briefing before the JPML, the case was transferred to the U.S. District Court for the Eastern District of Louisiana and consolidated with the MDL on April 2, 2013. On April 22, 2013, a companion case to this matter was filed in the U.S. District Court for the Northern District of Florida, Abood et al. v. Plant Performance Services, LLC et al. , No. 3:13-CV-00284 (N.D. Fla.), which alleges identical allegations against the same parties but names an additional 174 plaintiffs, all of whom served as clean-up workers in various Florida counties during the Deepwater Horizon oil spill response. A CTO was issued by the JPML on May 2, 2013, no objection was filed by the plaintiffs, and the case was transferred to the U.S. District Court for the Eastern District of Louisiana and consolidated with the MDL on May 10, 2013. By court order, both of these matters have been stayed until further notice. The Company is unable to estimate the potential exposure, if any, resulting from these matters but believes they are without merit 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 BP America Production Company (“BP America”) (collectively “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 claims and clean-up related claims against BP. The parties filed their proposed settlement agreements on April 18, 2012 along with motions seeking preliminary approval of the settlements. The Court held a hearing on April 25, 2012 to consider those motions and preliminarily approved both settlements on May 2, 2012. A final fairness hearing took place on November 8, 2012. The Court granted final approval to the Economic and Property Damages Class Action Settlement ("E&P Settlement") on December 21, 2012, and granted final approval to the Medical Benefits Class Action Settlement ("Medical Settlement") on January 11, 2013. Both class action settlements were appealed to the Fifth Circuit. The Fifth Circuit affirmed the MDL Court’s decision concerning the E&P Settlement on January 10, 2014, and also affirmed the MDL Court’s decision concerning the interpretation of the E&P Settlement with respect to business economic loss claims on March 3, 2014. The appeal of the Medical Settlement, on the other hand, was voluntarily dismissed and the Medical Settlement became effective on February 12, 2014. The deadline for submitting claims in both settlements have passed. Although neither the Company, ORM, nor NRC are parties to the settlement agreements, the Company, ORM, and NRC are listed as released parties on the releases accompanying both settlement agreements. Consequently, class members who did not file timely requests for exclusion will be barred from pursuing economic loss, property damage, personal injury, medical monitoring, and/or other released claims against the Company, ORM, and NRC. The Company believes these settlements have reduced the Company's and ORM's potential exposure, if any, from some of the pending actions described above, and continues to evaluate the settlements' impacts on these cases. The Company is unable to estimate the potential exposure, if any, resulting from these matters but believes they are without merit and does not expect that these matters will have a material effect on its consolidated financial position, results of operations or cash flows. ORM recently settled three collective action lawsuits that asserted failure to pay overtime with respect to individuals who provided service on the Deepwater Horizon oil spill response under the Fair Labor Standards Act (“FLSA”). These cases: Himmerite et al. v. O'Brien's Response Management Inc. et al. (E.D. La., Case No.: 2:12-cv-01533) (the “ Himmerite Action”); Dennis Prejean v. O'Brien's Response Management Inc. (E.D. La., Case No.: 2:12-cv-01045) (the “ Prejean Action”); and Baylor Singleton et. al. v. O'Brien's Response Management Inc. et. al. (E.D. La., Case No.: 2:12-cv-01716) (the “ Singleton Action”) were brought in the United States District Court for the Eastern District of Louisiana on behalf of certain individuals who worked on the Deepwater Horizon oil spill response. In the Singleton action, on February 13, 2014, the parties reached a full and final settlement agreement with respect to all of the Plaintiffs' individual claims for an undisclosed immaterial amount. On April 11, 2014, the Court approved the parties’ settlement and dismissed the Singleton Action with prejudice in its entirety, which extinguished the tolling of claims that had been in place for absent putative plaintiffs. In the Prejean action, the parties reached a full and final settlement agreement on November 6, 2014 with respect to all of the Plaintiffs’ individual and collective action claims for an undisclosed immaterial amount. The Court approved the settlement and dismissed the Prejean Action with prejudice in its entirety on November 19, 2014. In the Himmerite action, the parties reached a full and final settlement agreement on February 19, 2015 with respect to all of the Plaintiffs' claims for an undisclosed immaterial amount. The Court approved the settlement and dismissed the Himmerite Action with prejudice in its entirety on March 25, 2015, which also extinguished the tolling of claims which had been in place for absent putative plaintiffs. In the course of the Company's business, it may agree to indemnify the 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 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 certain obligations, including potential liabilities relating to work performed in connection with the Deepwater Horizon oil spill 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 liabilities relating to work performed in connection with the Deepwater Horizon oil spill response. In the normal 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.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2015
Long-term Debt and Capital Lease Obligations [Abstract]
Long-Term Debt	LONG-TERM DEBT 7.375% Senior Notes. SEACOR’s Board of Directors has previously authorized the Company to purchase any or all of its 7.375% Senior Notes due 2019, which may be acquired through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. During the six months ended June 30 , 2015 , the Company purchased $14.0 million in principal amount of its 7.375% Senior Notes for $14.4 million , resulting in a loss on debt extinguishment of $0.5 million . As of June 30, 2015 , the aggregate outstanding principal amount of the Company's 7.375% Senior Notes due 2019 was $ 219.5 million . Title XI Bonds. On June 1, 2014, SEA-Vista redeemed its Title XI bonds for $99.9 million and recorded a $29.0 million loss on extinguishment of debt for the then unamortized debt discount, the make whole premium paid and certain other redemption costs. As a consequence of redeeming the bonds prior to their scheduled maturity, SEA-Vista was required to pay a make whole premium in the amount of $20.5 million . The redemption of the bonds released the liens on vessels supporting the Title XI financing and facilitated the issuance of the SEA-Vista Credit Facility (see note below). The redemption of the Title XI bonds was funded with advances from the SEA-Vista Credit Facility, its restricted cash and its Title XI reserve funds. SEA-Vista Credit Facility. On April 15, 2015, SEA-Vista entered into a $300.0 million credit agreement with a syndicate of lenders that matures in 2020 (the " SEA-Vista Credit Facility") and is secured by substantially all of SEA-Vista's tangible and intangible assets with no recourse to SEACOR or its other subsidiaries. The SEA-Vista Credit Facility is comprised of three tranches: (i) a $100.0 million revolving credit facility (the "Revolving Loan"); (ii) an $80.0 million term loan (the "Term A-1 Loan"); and (iii) a $120.0 million delayed draw term loan (the "Term A-2 Loan"). The proceeds from the SEA-Vista Credit Facility were and will be used to fund SEA-Vista's working capital, general corporate purposes, capital commitments and the redemption of its Title XI Bonds (see note above). All three loans bear interest at a variable rate determined by reference to the London Interbank Offered Rate ("LIBOR") plus a margin of between 2.00% and 2.75% as determined in accordance with the SEA-Vista Credit Facility or, at the election of SEA-Vista, a Base Rate plus a margin of between 1.25% and 1.75% as determined in accordance with the SEA-Vista Credit Facility. A quarterly fee is payable on the unused commitments of all three tranches. SEA-Vista incurred $3.1 million of issuance costs related to the SEA-Vista Credit Facility. During the six months ended June 30 , 2015 , SEA-Vista drew $30.0 million under the Revolving Loan, $80.0 million under the Term A-1 Loan and $25.0 million under the Term A-2 Loan. Each of the loans under the SEA-Vista Credit Facility will mature on April 15, 2020 (the "Maturity Date"), which may be accelerated in certain circumstances. The principal of the Term A-1 Loan is repayable commencing in June 2015 in quarterly installments of 1.25% of the aggregate principal amount of the Term A-1 Loan through June 30, 2017. Commencing on September 30, 2017, the principal of each of the Term A-1 Loan and the Term A-2 Loan is repayable in quarterly installments of 2.50% of the aggregate principal amount of such loans, with the outstanding principal balance, interest and all other amounts outstanding for all loans, including the Revolving Loan, due and payable on the Maturity Date. During the six months ended June 30 , 2015 , SEA-Vista made a scheduled repayment of $1.0 million on the Term A-1 Loan. Commencing with the calendar year ending December 31, 2016, SEA-Vista is required to make annual prepayments on the Term A-1 Loan and the Term A-2 Loan in an amount equal to 50% of annual excess cash flow (as defined), with prepayments continuing on an annual basis until an amount equal to $75.0 million of the aggregate principal amount of the term loans has been repaid. Each such payment is to be made on or before May 15 of the subsequent calendar year (i.e., commencing May 15, 2017). In addition, SEA-Vista has the right to make optional prepayments on each of the loans without penalty in minimum amounts of $1.0 million . The SEA-Vista Credit Facility contains various financial maintenance and restrictive covenants including: funded debt to adjusted EBITDA; adjusted EBITDA to interest expense plus amortization; aggregate collateral vessel value to the sum of funded debt and unused and unexpired commitments; and minimum liquidity. In addition, the SEA-Vista Credit Facility restricts the payment of dividends and distributions as defined in the SEA-Vista Credit Facility. ICP Revolving Credit Facility. On April 9, 2015, ICP obtained a $30.0 million revolving credit facility with JP Morgan Chase Bank, N.A. serving as Administrative Agent and Lender (the “ICP Revolving Credit Facility”), which includes an accordion feature whereby loan commitments available under the facility could be increased in the future by an additional $20.0 million , subject to lender approval. The ICP Revolving Credit Facility will primarily be used to finance working capital requirements and for general corporate purposes. The ICP Revolving Credit Facility matures on April 9, 2018 and is secured by all assets of ICP, except real estate, with no recourse to SEACOR or its other subsidiaries. ICP has agreed not to pledge its real estate as collateral to any other party. The amount available for borrowing at any given time under the ICP Revolving Credit Facility is determined by a formula based on the current outstanding loan balance, the amount of ICP’s eligible outstanding accounts receivable balances, and the carrying value of its eligible inventories, subject to additional reserves. Interest on outstanding loans would equate to the one-month LIBOR interest rate plus an applicable margin of 2.00% . A monthly commitment fee is payable based on the unused amounts of the ICP Revolving Credit Facility. The ICP Revolving Credit Facility places restrictions on ICP including limitations on its ability to incur indebtedness, liens, restricted payments, and asset sales. Other restricted payments, including dividends, are subject to certain conditions, including undrawn availability under the ICP Revolving Credit Facility and ICP’s pro forma fixed charge coverage ratio, as defined. In addition, ICP is subject to various covenants under this agreement, as defined. ICP incurred $0.3 million in issuance costs related to the ICP Revolving Credit Facility. As of June 30, 2015 , ICP had no borrowings on the ICP Revolving Credit Facility. Other. During the six months ended June 30 , 2015 , the Company made other scheduled payments on long-term debt of $3.9 million and made net payments of $2.7 million under inventory financing arrangements. In addition, the Company received advances of $4.9 million and made repayments of $8.9 million on another subsidiary's revolving credit facility. As of June 30, 2015 , the Company had outstanding letters of credit totaling $31.6 million with various expiration dates through 2018 . Subsequent to June 30, 2015 the Company issued an additional letter of credit for $6.5 million .

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	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. The Company’s financial assets and liabilities as of June 30, 2015 that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Marketable securities (1) $ 29,411 $ — $ — Derivative instruments (included in other receivables) 472 259 — Construction reserve funds 275,131 — — LIABILITIES Short sale of marketable securities (1) (included in other current liabilities) 9,155 — — Derivative instruments (included in other current liabilities) 2,048 423 — ______________________ (1) Marketable security gains, net include unrealized gains of $6.0 million and $2.1 million for the three months ended June 30 , 2015 and 2014 , respectively, related to marketable security positions held by the Company as of June 30, 2015 . Marketable security gains, net include unrealized gains of $2.6 million and $4.4 million for the six months ended June 30 , 2015 and 2014 , respectively, related to marketable security positions held by the Company as of June 30, 2015 . The estimated fair values of the Company’s other financial assets and liabilities as of June 30, 2015 were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 433,827 $ 433,827 $ — $ — Investments, at cost, in 50% or less owned companies (included in other assets) 10,442 see below Notes receivable from third parties (included in other receivables and other assets) 25,512 see below LIABILITIES Long-term debt, including current portion (1) 924,593 — 985,610 — ______________________ (1) The estimated fair value includes the conversion options on the Company's 2.5% and 3.0% Convertible Senior Notes. The carrying value of cash and cash equivalents approximates fair value. The fair value of the Company’s long-term debt 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 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. It was not practicable to estimate the fair value of the Company’s notes receivable from third parties as the overall returns are uncertain due to certain provisions for additional payments contingent upon future events. 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. The Company’s non-financial assets and liabilities that were measured at fair value during the six months ended June 30 , 2015 were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Construction in progress (1) $ — $ 200 $ — Investment in VA&E (2) — 6,938 — ______________________ (1) During the six months ended June 30 , 2015 , the Company recognized impairment charges of $6.6 million related to the suspended construction of two offshore support vessels. The fair value of the construction in progress was determined based on the scrap value of the hulls. (2) During the six months ended June 30, 2015, the Company marked its equity investment in VA&E to fair value upon the deconsolidation of a previously controlled subsidiary following its contribution to VA&E. The fair value was determined based on the value of the equity investment the Company received.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Strategies	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments And Hedging Strategies	DERIVATIVE INSTRUMENTS AND HEDGING STRATEGIES Derivative instruments are classified as either assets or liabilities based on their individual fair values. Derivative assets and liabilities are included in other receivables and other current liabilities, respectively, in the accompanying condensed consolidated balance sheets. The fair values of the Company’s derivative instruments as of June 30, 2015 were as follows (in thousands): Derivative Asset Derivative Liability Options on equities and equity indices $ — $ 1,175 Forward currency exchange, option and future contracts — 82 Interest rate swap agreements — 341 Commodity swap, option and future contracts: Exchange traded 472 873 Non-exchange traded 259 — $ 731 $ 2,471 Cash Flow Hedges. Certain of the Company's 50% or less owned companies have interest rate swap agreements designated as cash flow hedges. By entering into these interest rate swap agreements, the Company's 50% or less owned companies have converted the variable LIBOR component of certain of their outstanding borrowings to a fixed interest rate. As of June 30, 2015 , the interest rate swaps held by the Company's 50% or less owned companies were as follows: • MexMar had four interest rate swap agreements with maturities in 2023 that call for MexMar to pay a fixed rate of interest ranging from 1.71% to 2.05% on the aggregate amortized notional value of $124.5 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. • Sea-Cat Crewzer II had an interest rate swap agreement maturing in 2019 that calls for Sea-Cat Crewzer II to pay a fixed rate of interest of 1.52% on the amortized notional value of $26.8 million and receive a variable interest rate based on LIBOR on the amortized notional value. • Sea-Cat Crewzer had an interest rate swap agreement maturing in 2019 that calls for Sea-Cat Crewzer to pay a fixed rate of interest of 1.52% on the amortized notional value of $23.8 million and receive a variable interest rate based on LIBOR on the amortized notional value. • SCFCo had two interest rate swap agreements with maturities in 2015 that call for SCFCo to pay a fixed rate of interest ranging from 1.53% to 1.62% on the aggregate amortized notional value of $13.2 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. • SeaJon had an interest rate swap agreement maturing in 2017 that calls for SeaJon to pay a fixed interest rate of 2.79% on the amortized notional value of $33.9 million and receive a variable interest rate based on LIBOR on the amortized notional value. Other Derivative Instruments. The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the six months ended June 30 as follows (in thousands): 2015 2014 Options on equities and equity indices $ (442 ) $ 22 Forward currency exchange, option and future contracts (302 ) 187 Interest rate swap agreements (5 ) (135 ) Commodity swap, option and future contracts: Exchange traded (2,271 ) 950 Non-exchange traded 1,450 (1,167 ) $ (1,570 ) $ (143 ) The Company holds positions in publicly traded equity options that convey the right or obligation to engage in a future transaction on the underlying equity security or index. The Company’s investment in equity options primarily includes positions in energy, marine, transportation and other related businesses. These contracts are typically entered into to mitigate the risk of changes in the market value of marketable security positions that the Company is either about to acquire, has acquired or is about to dispose. The Company enters and settles forward currency exchange, option and future contracts with respect to various foreign currencies. As of June 30, 2015 , the outstanding forward currency exchange contracts translated into a net purchase of foreign currencies with an aggregate U.S. dollar equivalent of $2.5 million . These contracts enable the Company to buy currencies in the future at fixed exchange rates, which could offset possible consequences of changes in currency exchange rates with respect to the Company’s business conducted outside of the United States. The Company generally does not enter into contracts with forward settlement dates beyond twelve to eighteen months. The Company and certain of its 50% or less owned companies have entered into interest rate swap agreements for the general purpose of providing protection against increases in interest rates, which might lead to higher interest costs. As of June 30, 2015 , the interest rate swaps held by the Company or its 50% or less owned companies were as follows: • The Company had an interest rate swap agreement maturing in 2018 that calls for the Company to pay a fixed interest rate of 3.00% on the amortized notional value of $8.1 million and receive a variable interest rate based on Euribor on the amortized notional value. • OSV Partners had two interest rate swap agreements with maturities in 2020 that call for OSV Partners to pay a fixed rate of interest ranging from 1.89% to 2.27% on the aggregate amortized notional value of $45.6 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. • Dynamic Offshore had an interest rate swap agreement maturing in 2018 that calls for Dynamic Offshore to pay a fixed interest rate of 1.30% on the amortized notional value of $88.5 million and receive a variable interest rate based on LIBOR on the amortized notional value. • Dorian had six interest rate swap agreements with maturities ranging from 2018 to 2020 that call for Dorian to a pay fixed rate of interest ranging from 2.96% to 5.40% on the aggregate amortized notional value of $116.5 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. The Company enters and settles positions in various exchange and non-exchange traded commodity swap, option and future contracts. ICP enters into exchange traded positions (primarily corn, ethanol and natural gas) to protect its raw material and finished goods inventory balance from market changes. VA&E enters into exchange traded positions to protect its fixed price future purchase and sale contracts for sugar as well as its inventory balances from market changes. As of June 30, 2015 , the net market exposure to these commodities under these contracts was not material.

Stock Repurchases

Stock Repurchases	6 Months Ended
	Jun. 30, 2015
Stock Repurchases [Abstract]
Stock Repurchases	STOCK REPURCHASES SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire shares of SEACOR common stock, par value $0.01 per share (“Common Stock”), which may be acquired through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. During the six months ended June 30 , 2015 , the Company acquired 284,227 shares of Common Stock for treasury for an aggregate purchase price of $19.9 million . As of June 30, 2015 , the remaining authority under the repurchase plan was $130.1 million . Subsequent to June 30, 2015 and through July 24, 2015, the Company acquired 107,018 shares of Common Stock for treasury for an aggregate purchase price of $6.9 million . During the six months ended June 30 , 2015 , the Company also purchased 40,859 shares of Common Stock for treasury for an aggregate purchase price of $3.0 million from its employees to cover their tax withholding obligations upon the lapsing of restrictions on share 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 (Notes)	6 Months Ended
	Jun. 30, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries Disclosure [Text Block]	NONCONTROLLING INTERESTS IN SUBSIDIARIES Noncontrolling interests in the Company's consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests June 30, 2015 December 31, 2014 Offshore Marine Services: Windcat Workboats 25% $ 8,502 $ 7,527 Other 1.8 % – 33.3% 839 1,323 Inland River Services: Other 3.0 % – 51.8% 1,094 1,088 Shipping Services: Sea-Vista 49% 73,043 89,680 Illinois Corn Processing 30% 20,764 16,397 Other 5.0 % – 14.6% 409 1,978 $ 104,651 $ 117,993 Windcat Workboats. Windcat Workboats owns and operates the Company’s wind farm utility vessels that are primarily used to move personnel and supplies in the major offshore wind markets of Europe. As of June 30, 2015 , the net assets of Windcat Workboats were $34.0 million . During the six months ended June 30 , 2015 , the net income of Windcat Workboats was $3.6 million , of which $0.9 million was attributable to noncontrolling interests. During the six months ended June 30 , 2014 , the net loss of Windcat Workboats was $0.1 million , of which the amount attributable to noncontrolling interests was not material. SEA-Vista. SEA-Vista owns and operates the Company's fleet of U.S.-flag product tankers used in the U.S. coastwise trade of crude oil, petroleum and specialty chemical products and holds contracts for the construction of three 50,000 DWT (deadweight tonnage) product tankers. As of June 30, 2015 , the net assets of SEA-Vista were $149.1 million . During the six months ended June 30 , 2015 , the net loss of SEA-Vista was $25.9 million , of which $12.7 million was attributable to noncontrolling interests. During the six months ended June 30 , 2014 , the net income of SEA-Vista was $4.1 million , of which $2.0 million was attributable to noncontrolling interests. Illinois Corn Processing. Illinois Corn Processing LLC (“ICP”) owns and operates an alcohol manufacturing, storage and distribution facility located in Pekin, IL. As of June 30, 2015 , the net assets of ICP were $69.2 million . During the six months ended June 30 , 2015 , the net income of ICP was $14.6 million , of which $4.4 million was attributable to noncontrolling interests. During the six months ended June 30 , 2014 , the net income of ICP was $23.8 million , of which $6.0 million was attributable to noncontrolling interests.

Multiemployer Pension Plans

Multiemployer Pension Plans	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Multiemployer Pension Plans	MULTI-EMPLOYER PENSION PLANS MNRPF. The cumulative funding deficits of the MNRPF are currently being recovered by additional annual contributions from current employers that are subject to adjustment following the results of future tri-annual actuarial valuations. Prior to 2012, the Company was invoiced and expensed $0.4 million for its allocated share of the then cumulative funding deficits. On February 25, 2015, the High Court approved a new deficit contribution scheme whereby any funding deficit of the MNRPF is to be remedied through funding contributions from all participating current and former employers. Based on an actuarial valuation in 2014, the potential cumulative funding deficit of the MNRPF was $510.6 million ( £325.0 million ). The MNRPF’s trustee estimates the Company’s allocated share of the cumulative funding deficit to be $6.6 million ( £4.2 million ), including portions deemed uncollectible due to the non-existence or liquidation of certain former employers. The Company will recognize payroll related operating expenses in the periods invoices are received. AMOPP. During the six months ended June 30 , 2015 , the Company received notification from the AMOPP that the Company's withdrawal liability as of September 30, 2014 was $39.9 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, 2015 , 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, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation	SHARE BASED COMPENSATION Transactions in connection with the Company’s share based compensation plans during the six months ended June 30 , 2015 were as follows: Director stock awards granted 1,625 Employee Stock Purchase Plan (“ESPP”) shares issued 20,470 Restricted stock awards granted 135,150 Restricted stock awards canceled — Shares released from Deferred Compensation Plan — Stock Option Activities: Outstanding as of December 31, 2014 1,546,508 Granted 107,175 Exercised (40,128 ) Expired (1,315 ) Outstanding as of June 30, 2015 1,612,240 Shares available for future grants and ESPP purchases as of June 30, 2015 862,908

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company’s segment presentation and basis of measurement of segment profit or loss are as previously described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . The following tables summarize the operating results, capital expenditures and assets of the Company's reportable segments. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2015 Operating Revenues: External customers 96,689 60,543 55,674 48,371 20,332 — 281,609 Intersegment 26 607 — — 5 (638 ) — 96,715 61,150 55,674 48,371 20,337 (638 ) 281,609 Costs and Expenses: Operating 72,173 48,556 36,124 40,588 11,103 (801 ) 207,743 Administrative and general 12,655 3,765 6,676 509 6,617 8,452 38,674 Depreciation and amortization 15,692 7,362 6,611 979 489 946 32,079 100,520 59,683 49,411 42,076 18,209 8,597 278,496 Gains (Losses) on Asset Dispositions 3,455 1,166 — — (235 ) — 4,386 Operating Income (Loss) (350 ) 2,633 6,263 6,295 1,893 (9,235 ) 7,499 Other Income (Expense): Derivative gains, net 4 177 — 50 304 891 1,426 Foreign currency gains, net 1,907 208 9 — 36 276 2,436 Other, net 43 — 187 4,112 40 51 4,433 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 2,826 (3,717 ) 2,363 — (408 ) — 1,064 Segment Profit (Loss) 4,430 (699 ) 8,822 10,457 1,865 Other Income (Expense) not included in Segment Profit (25,204 ) Less Equity Earnings included in Segment Profit (1,064 ) Loss Before Taxes and Equity Earnings (9,410 ) Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2015 Operating Revenues: External customers 190,110 116,379 107,081 87,969 40,714 — 542,253 Intersegment 61 1,378 — — 75 (1,514 ) — 190,171 117,757 107,081 87,969 40,789 (1,514 ) 542,253 Costs and Expenses: Operating 146,528 90,069 73,255 73,706 24,933 (1,600 ) 406,891 Administrative and general 26,214 7,649 12,965 1,071 13,753 15,909 77,561 Depreciation and amortization 31,058 14,251 13,346 1,959 989 1,906 63,509 203,800 111,969 99,566 76,736 39,675 16,215 547,961 Gains (Losses) on Asset Dispositions and Impairments, Net (3,194 ) 2,969 — — (235 ) — (460 ) Operating Income (Loss) (16,823 ) 8,757 7,515 11,233 879 (17,729 ) (6,168 ) Other Income (Expense): Derivative gains (losses), net (5 ) 259 — (778 ) (472 ) (574 ) (1,570 ) Foreign currency gains (losses), net 1,890 (913 ) (3 ) — (4 ) (527 ) 443 Other, net (103 ) — 216 4,112 48 116 4,389 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 5,801 (3,991 ) 3,504 — (351 ) — 4,963 Segment Profit (Loss) (9,240 ) 4,112 11,232 14,567 100 Other Income (Expense) not included in Segment Profit (Loss) (40,258 ) Less Equity Earnings included in Segment Profit (Loss) (4,963 ) Loss Before Taxes and Equity Earnings (43,164 ) Capital Expenditures 53,118 12,702 63,421 2,519 26 342 132,128 As of June 30, 2015 Property and Equipment: Historical cost 1,072,937 492,508 454,076 47,256 3,146 30,386 2,100,309 Accumulated depreciation (525,937 ) (169,677 ) (226,127 ) (17,447 ) (2,901 ) (12,842 ) (954,931 ) 547,000 322,831 227,949 29,809 245 17,544 1,145,378 Construction in progress 103,992 27,352 264,191 3,237 — 261 399,033 650,992 350,183 492,140 33,046 245 17,805 1,544,411 Investments, at Equity, and Advances to 50% or Less Owned Companies 126,601 100,700 206,889 — 48,112 — 482,302 Inventories 5,583 2,085 878 11,190 — — 19,736 Goodwill 13,367 2,500 1,852 — 44,967 — 62,686 Intangible Assets 1,113 6,461 — — 23,168 — 30,742 Other current and long-term assets, excluding cash and near cash assets (3) 103,444 70,975 32,208 10,345 61,592 20,670 299,234 Segment Assets 901,100 532,904 733,967 54,581 178,084 Cash and near cash assets (3) 738,369 Total Assets 3,177,480 ______________________ (1) Operating revenues includes $82.3 million of tangible product sales and operating expenses includes $68.0 million of costs of goods sold. (2) Inventories includes raw materials of $1.7 million and work in process of $1.6 million . (3) Cash and near cash assets includes cash, cash equivalents, marketable securities, and construction reserve funds. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2014 Operating Revenues: External customers 138,214 55,200 53,575 72,798 8,437 — 328,224 Intersegment 33 807 — — — (840 ) — 138,247 56,007 53,575 72,798 8,437 (840 ) 328,224 Costs and Expenses: Operating 93,755 45,047 28,018 56,429 9,464 (807 ) 231,906 Administrative and general 13,426 3,835 5,421 594 3,449 7,961 34,686 Depreciation and amortization 16,448 7,564 7,115 1,010 82 1,001 33,220 123,629 56,446 40,554 58,033 12,995 8,155 299,812 Gains (Losses) on Asset Dispositions and Impairments, Net 3,526 810 (41 ) — — — 4,295 Operating Income (Loss) 18,144 371 12,980 14,765 (4,558 ) (8,995 ) 32,707 Other Income (Expense): Derivative gains (losses), net (70 ) — — (1,519 ) 1,500 183 94 Foreign currency gains (losses), net 1,322 474 1 — 53 (130 ) 1,720 Other, net 14,739 — 158 300 (5,013 ) 29 10,213 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 2,244 (3,335 ) 1,564 — (985 ) — (512 ) Segment Profit (Loss) 36,379 (2,490 ) 14,703 13,546 (9,003 ) Other Income (Expense) not included in Segment Profit (Loss) (3,697 ) Less Equity Earnings included in Segment Profit (Loss) 512 Income Before Taxes and Equity Earnings 41,037 Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2014 Operating Revenues: External customers 267,171 112,211 105,976 131,454 21,429 — 638,241 Intersegment 77 1,755 — — — (1,832 ) — 267,248 113,966 105,976 131,454 21,429 (1,832 ) 638,241 Costs and Expenses: Operating 187,798 84,721 55,015 103,703 21,400 (1,755 ) 450,882 Administrative and general 28,586 8,172 11,317 1,105 6,560 17,023 72,763 Depreciation and amortization 32,752 14,934 14,869 2,000 167 1,890 66,612 249,136 107,827 81,201 106,808 28,127 17,158 590,257 Gains (Losses) on Asset Dispositions and Impairments, Net 11,264 1,663 (41 ) — (409 ) (3,504 ) 8,973 Operating Income (Loss) 29,376 7,802 24,734 24,646 (7,107 ) (22,494 ) 56,957 Other Income (Expense): Derivative gains (losses), net (131 ) — — (801 ) 767 22 (143 ) Foreign currency gains (losses), net 1,429 147 (9 ) — 62 (108 ) 1,521 Other, net 14,739 (38 ) (3,775 ) 493 (4,838 ) (23 ) 6,558 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 4,885 (3,747 ) 2,317 — (1,746 ) — 1,709 Segment Profit (Loss) 50,298 4,164 23,267 24,338 (12,862 ) Other Income (Expense) not included in Segment Profit (Loss) (5,987 ) Less Equity Earnings included in Segment Profit (Loss) (1,709 ) Income Before Taxes and Equity Earnings 58,906 Capital Expenditures 46,621 44,086 165,160 2,098 123 15,581 273,669 As of June 30, 2014 Property and Equipment: Historical cost 1,154,174 519,586 451,123 44,808 3,760 43,176 2,216,627 Accumulated depreciation (499,092 ) (161,091 ) (200,908 ) (13,369 ) (769 ) (13,213 ) (888,442 ) 655,082 358,495 250,215 31,439 2,991 29,963 1,328,185 Construction in progress 91,824 32,175 171,204 2,156 224 (60 ) 297,523 746,906 390,670 421,419 33,595 3,215 29,903 1,625,708 Investments, at Equity, and Advances to 50% or Less Owned Companies 129,775 61,653 205,110 — 87,626 — 484,164 Inventories 5,571 2,309 1,438 9,926 963 — 20,207 Goodwill 13,367 2,793 1,852 — — — 18,012 Intangible Assets 2,784 7,085 575 — 310 — 10,754 Other current and long-term assets, excluding cash and near cash assets (3) 154,188 55,819 19,816 13,559 49,232 18,642 311,256 Segment Assets 1,052,591 520,329 650,210 57,080 141,346 Cash and near cash assets (3) 825,892 Total Assets 3,295,993 ______________________ (1) Operating revenues includes $126.1 million of tangible product sales and operating expenses includes $98.2 million of costs of goods sold. (2) Inventories includes raw materials of $2.2 million and work in process of $1.3 million . (3) Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.

Basis of Presentation and Acc21

Basis of Presentation and Accounting Policy (Policy)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis Of Consolidation	The condensed consolidated financial information for the three and six months ended June 30 , 2015 and 2014 has been prepared by the Company and has not been audited by its independent registered 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, 2015 , its results of operations for the three and six months ended June 30 , 2015 and 2014 , its comprehensive income (loss) for the three and six months ended June 30 , 2015 and 2014 , its changes in equity for the six months ended June 30 , 2015 , and its cash flows for the six months ended June 30 , 2015 and 2014 . 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, 2014 . 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. 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, 2014 .
Revenue Recognition	Revenue Recognition. The Company recognizes revenue when it is realized or realizable and earned. Revenue is realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue that does not meet these criteria is deferred until the criteria are met. As of June 30, 2015 , deferred revenues of $6.8 million , included in other current liabilities, related to the time charter of several offshore support vessels scheduled to be paid through the conveyance of an overriding royalty interest (the "Conveyance") in developmental oil and gas producing properties operated by a customer in the U.S. Gulf of Mexico. Payments under the Conveyance, and the timing of such payments, were contingent upon production and energy sale prices. On August 17, 2012, the customer filed a voluntary petition for chapter 11 bankruptcy, which was converted to chapter 7 in June 2014. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to August 17, 2012 and during the 90 days prior to the filing are subject to bankruptcy court approval. The Company will recognize revenues when legally permissible as provided under the bankruptcy court rules. All costs and expenses related to these charters were recognized as incurred.
Property, Plant and Equipment Disclosure [Text Block]	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 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, 2015 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off ("RORO"). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings 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. 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 , 2015 , capitalized interest totaled $9.6 million . EQUIPMENT ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS During the six months ended June 30 , 2015 , capital expenditures were $132.1 million . Equipment deliveries during the six months ended June 30 , 2015 included one fast support vessel, one supply vessel, one wind farm utility vessel and two inland river towboats. During the six months ended June 30 , 2015 , the Company sold two offshore support vessels, one 10,000 barrel inland river tank barge, twelve inland river deck barges and other property and equipment for net proceeds of $24.7 million , ( $22.7 million in cash and $2.0 million in seller financing) and gains of $3.6 million , of which $1.6 million were recognized currently and $2.0 million were deferred. In addition, the Company recognized previously deferred gains of $4.6 million . During the six months ended June 30 , 2015 , the Company recognized impairment charges of $6.6 million related to the suspended construction of two offshore support vessels.
Schedule of Estimated Useful Life of Newly Acquired Equipment [Table Text Block]	As of June 30, 2015 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off ("RORO"). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings 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. 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 , 2015 , capitalized interest totaled $9.6 million .
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	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. If the carrying value of the assets is not recoverable, as determined by the estimated undiscounted cash flows, the carrying value of the assets is reduced to fair value. 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 , 2015 and 2014 , the Company recognized impairment charges of $6.6 million and $3.9 million , respectively, related to long-lived assets held for use.
Income Tax Disclosure [Text Block]	Income Taxes. During the three and six months ended June 30 , 2015 , the Company's effective tax rates of negative 1.6% and 27.3% , respectively, were primarily due to tax benefits not recognized on losses attributable to noncontrolling interests (see Note 9).
Deferred Gains [Policy Text Block]	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): 2015 2014 Balance at beginning of period $ 159,911 $ 124,763 Adjustments to deferred gains arising from asset sales 2,035 40,445 Amortization of deferred gains included in operating expenses as a reduction to rental expense (11,273 ) (7,155 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (4,597 ) (2,656 ) Balance at end of period $ 146,076 $ 155,397
Schedule Of Deferred Gain Activity [Table Text Block]	Deferred gain activity related to these transactions for the six months ended June 30 was as follows (in thousands): 2015 2014 Balance at beginning of period $ 159,911 $ 124,763 Adjustments to deferred gains arising from asset sales 2,035 40,445 Amortization of deferred gains included in operating expenses as a reduction to rental expense (11,273 ) (7,155 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (4,597 ) (2,656 ) Balance at end of period $ 146,076 $ 155,397
Comprehensive Income (Loss) Note	Accumulated Other Comprehensive Loss. The components of accumulated other comprehensive loss were as follows: SEACOR Holdings Inc. Stockholders' Equity Noncontrolling Interests Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Total Foreign Currency Translation Adjustments Other Other Comprehensive Income December 31, 2014 $ (3,494 ) $ (16 ) $ 5 $ (3,505 ) $ (86 ) $ 3 Other comprehensive income 486 26 — 512 69 — $ 581 Income tax expense (170 ) (9 ) — (179 ) — — (179 ) Six months ended June 30, 2015 $ (3,178 ) $ 1 $ 5 $ (3,172 ) $ (17 ) $ 3 $ 402
Earnings Per Common Share of SEACOR	Earnings (Loss) Per Share. Basic earnings (loss) per common share of SEACOR are computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings (loss) per common share of SEACOR are 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 (loss) 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 (Loss) Attributable to SEACOR Average O/S Shares Per Share 2015 Basic Weighted Average Common Shares Outstanding $ 687 17,780,759 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 301,705 — — Convertible Notes (2)(3) — — — — Diluted Weighted Average Common Shares Outstanding $ 687 18,082,464 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) 2014 Basic Weighted Average Common Shares Outstanding $ 21,067 19,989,402 $ 1.05 $ 32,576 20,049,056 $ 1.62 Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 394,567 — 416,288 Convertible Notes (2) 3,148 4,200,525 6,287 4,200,525 Diluted Weighted Average Common Shares Outstanding $ 24,215 24,584,494 $ 0.98 $ 38,863 24,665,869 $ 1.58 ______________________ (1) For the three months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 685,645 and 365,398 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the six months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 2,017,788 and 288,510 , 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 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 1,825,326 common shares issuable pursuant to the Company's 3.0% 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 , 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company's 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.
New Accounting Pronouncements	New Accounting Pronouncements. On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued a comprehensive new revenue recognition standard that will supersede nearly all existing revenue recognition guidance under generally accepted accounting principles in the United States. The core principal of the new standard is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard is effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted. The Company has not yet selected the method of adoption or 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 February 18, 2015, the FASB issued an accounting standard update that amends the guidance for evaluating whether to consolidate certain legal entities. Specifically, the accounting standard update modifies the method for determining whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities. Further, it eliminates the presumption that a general partner should consolidate a limited partnership and impacts the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The accounting standard update is effective for annual and interim periods beginning after December 15, 2015 and early adoption permitted. The Company has not yet determined what impact, if any, the adoption of the accounting standard update will have on its consolidated financial position, results of operations or cash flows. On April 7, 2015, the FASB issued final guidance to simplify the presentation of debt issuance costs by requiring debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the debt liability rather than as an asset. The recognition and measurement guidance for debt issuance costs have not changed. The new standard requires retrospective application and represents a change in accounting principle. The final guidance is effective for annual and interim periods beginning after December 15, 2015 and early adoption is permitted. As of June 30, 2015 , the Company had $12.6 million of debt issuance costs included in other assets in the accompanying condensed consolidated balance sheets.

Basis of Presentation and Acc22

Basis of Presentation and Accounting Policy Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares [Table Text Block]	Computations of basic and diluted earnings (loss) 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 (Loss) Attributable to SEACOR Average O/S Shares Per Share 2015 Basic Weighted Average Common Shares Outstanding $ 687 17,780,759 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 301,705 — — Convertible Notes (2)(3) — — — — Diluted Weighted Average Common Shares Outstanding $ 687 18,082,464 $ 0.04 $ (18,882 ) 17,779,250 $ (1.06 ) 2014 Basic Weighted Average Common Shares Outstanding $ 21,067 19,989,402 $ 1.05 $ 32,576 20,049,056 $ 1.62 Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 394,567 — 416,288 Convertible Notes (2) 3,148 4,200,525 6,287 4,200,525 Diluted Weighted Average Common Shares Outstanding $ 24,215 24,584,494 $ 0.98 $ 38,863 24,665,869 $ 1.58 ______________________ (1) For the three months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 685,645 and 365,398 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the six months ended June 30 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 2,017,788 and 288,510 , 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 , 2015 and 2014 , diluted earnings per common share of SEACOR excluded 1,825,326 common shares issuable pursuant to the Company's 3.0% 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 , 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company's 2.5% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The Company’s financial assets and liabilities as of June 30, 2015 that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Marketable securities (1) $ 29,411 $ — $ — Derivative instruments (included in other receivables) 472 259 — Construction reserve funds 275,131 — — LIABILITIES Short sale of marketable securities (1) (included in other current liabilities) 9,155 — — Derivative instruments (included in other current liabilities) 2,048 423 — ______________________ (1) Marketable security gains, net include unrealized gains of $6.0 million and $2.1 million for the three months ended June 30 , 2015 and 2014 , respectively, related to marketable security positions held by the Company as of June 30, 2015 .
Estimated Fair Value Of Other Financial Assets And Liabilities	The estimated fair values of the Company’s other financial assets and liabilities as of June 30, 2015 were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 433,827 $ 433,827 $ — $ — Investments, at cost, in 50% or less owned companies (included in other assets) 10,442 see below Notes receivable from third parties (included in other receivables and other assets) 25,512 see below LIABILITIES Long-term debt, including current portion (1) 924,593 — 985,610 — ______________________ (1) The estimated fair value includes the conversion options on the Company's 2.5% and 3.0% Convertible Senior Notes.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The Company’s non-financial assets and liabilities that were measured at fair value during the six months ended June 30 , 2015 were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Construction in progress (1) $ — $ 200 $ — Investment in VA&E (2) — 6,938 — ______________________ (1) During the six months ended June 30 , 2015 , the Company recognized impairment charges of $6.6 million related to the suspended construction of two offshore support vessels. The fair value of the construction in progress was determined based on the scrap value of the hulls. (2) During the six months ended June 30, 2015, the Company marked its equity investment in VA&E to fair value upon the deconsolidation of a previously controlled subsidiary following its contribution to VA&E. The fair value was determined based on the value of the equity investment the Company received.

Derivative Instruments And He24

Derivative Instruments And Hedging Strategies (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative [Line Items]
Fair Values Of Derivative Instruments	The fair values of the Company’s derivative instruments as of June 30, 2015 were as follows (in thousands): Derivative Asset Derivative Liability Options on equities and equity indices $ — $ 1,175 Forward currency exchange, option and future contracts — 82 Interest rate swap agreements — 341 Commodity swap, option and future contracts: Exchange traded 472 873 Non-exchange traded 259 — $ 731 $ 2,471
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments	Other Derivative Instruments. The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the six months ended June 30 as follows (in thousands): 2015 2014 Options on equities and equity indices $ (442 ) $ 22 Forward currency exchange, option and future contracts (302 ) 187 Interest rate swap agreements (5 ) (135 ) Commodity swap, option and future contracts: Exchange traded (2,271 ) 950 Non-exchange traded 1,450 (1,167 ) $ (1,570 ) $ (143 )

Noncontrolling Interests in S25

Noncontrolling Interests in Subsidiaries (Tables)	6 Months Ended
	Jun. 30, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries [Table Text Block]	oncontrolling interests in the Company's consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests June 30, 2015 December 31, 2014 Offshore Marine Services: Windcat Workboats 25% $ 8,502 $ 7,527 Other 1.8 % – 33.3% 839 1,323 Inland River Services: Other 3.0 % – 51.8% 1,094 1,088 Shipping Services: Sea-Vista 49% 73,043 89,680 Illinois Corn Processing 30% 20,764 16,397 Other 5.0 % – 14.6% 409 1,978 $ 104,651 $ 117,993

Share Based Compensation (Table

Share Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Plans	Transactions in connection with the Company’s share based compensation plans during the six months ended June 30 , 2015 were as follows: Director stock awards granted 1,625 Employee Stock Purchase Plan (“ESPP”) shares issued 20,470 Restricted stock awards granted 135,150 Restricted stock awards canceled — Shares released from Deferred Compensation Plan — Stock Option Activities: Outstanding as of December 31, 2014 1,546,508 Granted 107,175 Exercised (40,128 ) Expired (1,315 ) Outstanding as of June 30, 2015 1,612,240 Shares available for future grants and ESPP purchases as of June 30, 2015 862,908

Segment Information Segment Inf

Segment Information Segment Information (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Operating Results, Capital Expenditures And Assets By Reporting Segment	The following tables summarize the operating results, capital expenditures and assets of the Company's reportable segments. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2015 Operating Revenues: External customers 96,689 60,543 55,674 48,371 20,332 — 281,609 Intersegment 26 607 — — 5 (638 ) — 96,715 61,150 55,674 48,371 20,337 (638 ) 281,609 Costs and Expenses: Operating 72,173 48,556 36,124 40,588 11,103 (801 ) 207,743 Administrative and general 12,655 3,765 6,676 509 6,617 8,452 38,674 Depreciation and amortization 15,692 7,362 6,611 979 489 946 32,079 100,520 59,683 49,411 42,076 18,209 8,597 278,496 Gains (Losses) on Asset Dispositions 3,455 1,166 — — (235 ) — 4,386 Operating Income (Loss) (350 ) 2,633 6,263 6,295 1,893 (9,235 ) 7,499 Other Income (Expense): Derivative gains, net 4 177 — 50 304 891 1,426 Foreign currency gains, net 1,907 208 9 — 36 276 2,436 Other, net 43 — 187 4,112 40 51 4,433 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 2,826 (3,717 ) 2,363 — (408 ) — 1,064 Segment Profit (Loss) 4,430 (699 ) 8,822 10,457 1,865 Other Income (Expense) not included in Segment Profit (25,204 ) Less Equity Earnings included in Segment Profit (1,064 ) Loss Before Taxes and Equity Earnings (9,410 ) Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2015 Operating Revenues: External customers 190,110 116,379 107,081 87,969 40,714 — 542,253 Intersegment 61 1,378 — — 75 (1,514 ) — 190,171 117,757 107,081 87,969 40,789 (1,514 ) 542,253 Costs and Expenses: Operating 146,528 90,069 73,255 73,706 24,933 (1,600 ) 406,891 Administrative and general 26,214 7,649 12,965 1,071 13,753 15,909 77,561 Depreciation and amortization 31,058 14,251 13,346 1,959 989 1,906 63,509 203,800 111,969 99,566 76,736 39,675 16,215 547,961 Gains (Losses) on Asset Dispositions and Impairments, Net (3,194 ) 2,969 — — (235 ) — (460 ) Operating Income (Loss) (16,823 ) 8,757 7,515 11,233 879 (17,729 ) (6,168 ) Other Income (Expense): Derivative gains (losses), net (5 ) 259 — (778 ) (472 ) (574 ) (1,570 ) Foreign currency gains (losses), net 1,890 (913 ) (3 ) — (4 ) (527 ) 443 Other, net (103 ) — 216 4,112 48 116 4,389 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 5,801 (3,991 ) 3,504 — (351 ) — 4,963 Segment Profit (Loss) (9,240 ) 4,112 11,232 14,567 100 Other Income (Expense) not included in Segment Profit (Loss) (40,258 ) Less Equity Earnings included in Segment Profit (Loss) (4,963 ) Loss Before Taxes and Equity Earnings (43,164 ) Capital Expenditures 53,118 12,702 63,421 2,519 26 342 132,128 As of June 30, 2015 Property and Equipment: Historical cost 1,072,937 492,508 454,076 47,256 3,146 30,386 2,100,309 Accumulated depreciation (525,937 ) (169,677 ) (226,127 ) (17,447 ) (2,901 ) (12,842 ) (954,931 ) 547,000 322,831 227,949 29,809 245 17,544 1,145,378 Construction in progress 103,992 27,352 264,191 3,237 — 261 399,033 650,992 350,183 492,140 33,046 245 17,805 1,544,411 Investments, at Equity, and Advances to 50% or Less Owned Companies 126,601 100,700 206,889 — 48,112 — 482,302 Inventories 5,583 2,085 878 11,190 — — 19,736 Goodwill 13,367 2,500 1,852 — 44,967 — 62,686 Intangible Assets 1,113 6,461 — — 23,168 — 30,742 Other current and long-term assets, excluding cash and near cash assets (3) 103,444 70,975 32,208 10,345 61,592 20,670 299,234 Segment Assets 901,100 532,904 733,967 54,581 178,084 Cash and near cash assets (3) 738,369 Total Assets 3,177,480 ______________________ (1) Operating revenues includes $82.3 million of tangible product sales and operating expenses includes $68.0 million of costs of goods sold. (2) Inventories includes raw materials of $1.7 million and work in process of $1.6 million . (3) Cash and near cash assets includes cash, cash equivalents, marketable securities, and construction reserve funds. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended June 30, 2014 Operating Revenues: External customers 138,214 55,200 53,575 72,798 8,437 — 328,224 Intersegment 33 807 — — — (840 ) — 138,247 56,007 53,575 72,798 8,437 (840 ) 328,224 Costs and Expenses: Operating 93,755 45,047 28,018 56,429 9,464 (807 ) 231,906 Administrative and general 13,426 3,835 5,421 594 3,449 7,961 34,686 Depreciation and amortization 16,448 7,564 7,115 1,010 82 1,001 33,220 123,629 56,446 40,554 58,033 12,995 8,155 299,812 Gains (Losses) on Asset Dispositions and Impairments, Net 3,526 810 (41 ) — — — 4,295 Operating Income (Loss) 18,144 371 12,980 14,765 (4,558 ) (8,995 ) 32,707 Other Income (Expense): Derivative gains (losses), net (70 ) — — (1,519 ) 1,500 183 94 Foreign currency gains (losses), net 1,322 474 1 — 53 (130 ) 1,720 Other, net 14,739 — 158 300 (5,013 ) 29 10,213 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 2,244 (3,335 ) 1,564 — (985 ) — (512 ) Segment Profit (Loss) 36,379 (2,490 ) 14,703 13,546 (9,003 ) Other Income (Expense) not included in Segment Profit (Loss) (3,697 ) Less Equity Earnings included in Segment Profit (Loss) 512 Income Before Taxes and Equity Earnings 41,037 Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the six months ended June 30, 2014 Operating Revenues: External customers 267,171 112,211 105,976 131,454 21,429 — 638,241 Intersegment 77 1,755 — — — (1,832 ) — 267,248 113,966 105,976 131,454 21,429 (1,832 ) 638,241 Costs and Expenses: Operating 187,798 84,721 55,015 103,703 21,400 (1,755 ) 450,882 Administrative and general 28,586 8,172 11,317 1,105 6,560 17,023 72,763 Depreciation and amortization 32,752 14,934 14,869 2,000 167 1,890 66,612 249,136 107,827 81,201 106,808 28,127 17,158 590,257 Gains (Losses) on Asset Dispositions and Impairments, Net 11,264 1,663 (41 ) — (409 ) (3,504 ) 8,973 Operating Income (Loss) 29,376 7,802 24,734 24,646 (7,107 ) (22,494 ) 56,957 Other Income (Expense): Derivative gains (losses), net (131 ) — — (801 ) 767 22 (143 ) Foreign currency gains (losses), net 1,429 147 (9 ) — 62 (108 ) 1,521 Other, net 14,739 (38 ) (3,775 ) 493 (4,838 ) (23 ) 6,558 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 4,885 (3,747 ) 2,317 — (1,746 ) — 1,709 Segment Profit (Loss) 50,298 4,164 23,267 24,338 (12,862 ) Other Income (Expense) not included in Segment Profit (Loss) (5,987 ) Less Equity Earnings included in Segment Profit (Loss) (1,709 ) Income Before Taxes and Equity Earnings 58,906 Capital Expenditures 46,621 44,086 165,160 2,098 123 15,581 273,669 As of June 30, 2014 Property and Equipment: Historical cost 1,154,174 519,586 451,123 44,808 3,760 43,176 2,216,627 Accumulated depreciation (499,092 ) (161,091 ) (200,908 ) (13,369 ) (769 ) (13,213 ) (888,442 ) 655,082 358,495 250,215 31,439 2,991 29,963 1,328,185 Construction in progress 91,824 32,175 171,204 2,156 224 (60 ) 297,523 746,906 390,670 421,419 33,595 3,215 29,903 1,625,708 Investments, at Equity, and Advances to 50% or Less Owned Companies 129,775 61,653 205,110 — 87,626 — 484,164 Inventories 5,571 2,309 1,438 9,926 963 — 20,207 Goodwill 13,367 2,793 1,852 — — — 18,012 Intangible Assets 2,784 7,085 575 — 310 — 10,754 Other current and long-term assets, excluding cash and near cash assets (3) 154,188 55,819 19,816 13,559 49,232 18,642 311,256 Segment Assets 1,052,591 520,329 650,210 57,080 141,346 Cash and near cash assets (3) 825,892 Total Assets 3,295,993 ______________________ (1) Operating revenues includes $126.1 million of tangible product sales and operating expenses includes $98.2 million of costs of goods sold. (2) Inventories includes raw materials of $2.2 million and work in process of $1.3 million . (3) Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.

Basis of Presentation and Acc28

Basis of Presentation and Accounting Policy Revenue Recognition (Details) $ in Millions	Jun. 30, 2015USD ($)
Revenue Recognition [Abstract]
Deferred Revenue	$ 6.8

Basis of Presentation and Acc29

Basis of Presentation and Accounting Policy Property and Equipment (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Capitalized Interest Costs, Including Allowance for Funds Used During Construction		$ 9.6
Offshore Support Vessels [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Wind Farm Utility Vessel [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Inland River Dry Cargo Barges [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Inland River Liquid Tank Barges [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Inland River Towboats [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
U.S.-flag Product Tankers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
R O R O Vessels [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Harbor and Offshore Tugs [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Ocean Liquid Tank Barge [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Terminal And Manufacturing Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years

Basis of Presentation and Acc30

Basis of Presentation and Accounting Policy Impairments of Long-Lived Assets (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Offshore Support Vessels [Member]
Asset Impairment Charges	$ 6.6
Aircraft [Member]
Asset Impairment Charges		$ 3.9

Basis of Presentation and Acc31

Basis of Presentation and Accounting Policy Deferred Gains (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Deferred Gains	$ 146,076	$ 155,397	$ 159,911	$ 124,763
Sales Leaseback and Financed Equipment Sales [Member]
Deferred Gains on Asset Sales	2,035	40,445
Amortization Of Deferred Gains Included in Operating Expenses As A Reduction To Rental Expense	11,273	7,155
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net	$ 4,597	$ 2,656

Basis of Presentation and Acc32

Basis of Presentation and Accounting Policy Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (3,178)		$ (3,178)		$ (3,494)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	1		1		(16)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	5		5		5
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent			486
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent			26
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent			0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent			512
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest					69
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive Income (Loss), before Tax	4,564	$ 1,967	581	$ 2,419
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent			(170)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent			(9)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent			0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent			(179)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive Income (Loss), Tax	1,434	621	179	763
Accumulated Other Comprehensive Loss, Net of Tax	(3,172)		(3,172)		(3,505)
Other Comprehensive Income (Loss), Net of Tax	3,130	$ 1,346	402	$ 1,656
Non-Controlling Interests In Subsidiaries [Member]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(17)		(17)		(86)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ 3		3		$ 3
Other Comprehensive Income (Loss), Net of Tax			$ 69

Basis of Presentation and Acc33

Basis of Presentation and Accounting Policy Earning Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Net Income (Loss) attributable to SEACOR Holdings Inc.	$ 687,000	$ 21,067,000	$ (18,882,000)	$ 32,576,000
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	0	0	0	0
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	0	3,148,000	0	6,287,000
Net Income (Loss) Available to Common Stockholders, Diluted	$ 687,000	$ 24,215,000	$ (18,882,000)	$ 38,863,000
Weighted Average Number of Shares Outstanding, Basic	17,780,759	19,989,402	17,779,250	20,049,056
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	301,705	394,567	0	416,288
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	0	4,200,525	0	4,200,525
Weighted Average Number of Shares Outstanding, Diluted	18,082,464	24,584,494	17,779,250	24,665,869
Earnings Per Share, Basic	$ 0.04	$ 1.05	$ (1.06)	$ 1.62
Earnings Per Share, Diluted	$ 0.04	$ 0.98	$ (1.06)	$ 1.58
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	685,645	365,398		288,510	2,017,788
Three Point Zero Percentage Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,825,326
Two Point Five Percentage Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			4,200,525

Basis of Presentation and Acc34

Basis of Presentation and Accounting Policy New Accounting Pronouncements (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015USD ($)
Accounting Policies [Abstract]
Debt Issuance Cost	$ 12.6

Basis of Presentation and Acc35

Basis of Presentation and Accounting Policy Income Taxes (Details) - Jun. 30, 2015	Total	Total
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	(1.60%)	27.30%

Business Acquisitions (Narrativ

Business Acquisitions (Narrative) (Details) - Witt O'Brien's LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Jul. 11, 2014
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		45.80%
Payments to Acquire Businesses, Gross	$ 35.4
Goodwill, Gross		$ 45

Equipment Acquisitions, Dispo37

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Narrative) (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2015USD ($)equipment	Jun. 30, 2014USD ($)	Dec. 31, 2014equipment
Property, Plant and Equipment [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 132,128	$ 273,669
Sales Price Of Equipment	24,700
Proceeds from disposition of property and equipment	22,686	$ 78,039
Proceeds from Issuance of Secured Debt	2,000
Gain (Loss) on Disposition of Property Plant Equipment	$ 3,600
Offshore Support Vessels Fast Support [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered | equipment	1
Offshore Support Vessels Supply [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered | equipment			1
Wind Farm Utility Vessel [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered | equipment	1
Inland River Towboat [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered | equipment	2
Offshore Support Vessels [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold | equipment	2
Asset Impairment Charges	$ 6,600
Inland River Liquid Tank Barges - 10,000 Barrel [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold | equipment			1
Inland River Deck Barges [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold | equipment			12
Gains on Asset Dispositions and Impariments, Net [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	1,600
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net	$ 4,600

Investments, At Equity, And A38

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2015USD ($)	Jun. 30, 2015USD ($)equipmentshares	Dec. 31, 2014USD ($)	May. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 91.3
Allocable Share of Uncalled Capital		1.4
Mexmar [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions		7.9
Secured Debt, Repayments	$ 15
OSV Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			$ 1.4
Falcon Global [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions		$ 9.9
Equity Method Investment, Ownership Percentage		50.00%
SCFCo Holdings [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions		$ 3
Outstanding Working Capital Advances At End Of Period		31.7
Bunge Scf Grain [Member]
Schedule Of Equity Method Investments [Line Items]
Outstanding Working Capital Advances At End Of Period		7
Proceeds from Collection of Advance to Affiliate		(2)
SCF Bunge Marine [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		$ 2.5
Dorian LPG [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		15.88%
Sale of Stock, Number of Shares Issued in Transaction | shares		150,000
Proceeds from Sale and Maturity of Marketable Securities		$ 2.3
Investments, at Equity, and Advances to 50% or Less Owned Companies		140.7
Equity Method Investment, Quoted Market Value		153.1
Trailer Bridge Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Repayment of Notes Receivable from Related Parties		15.5
Sea-Access [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		3.9
Partners' Capital Account, Return of Capital		2.9
Seajon [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		0.6
SeaJon II [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions	$ 1
Avion Pacific Limited [Member]
Schedule Of Equity Method Investments [Line Items]
Repayment of Notes Receivable from Related Parties			$ 3
V&A [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage				81.10%
VA&E [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions		$ 3.5
Equity Method Investment, Ownership Percentage		41.30%
Business Combination, Separately Recognized Transactions, Net Gains and Losses		$ 0.1
Line of Credit Facility, Maximum Borrowing Capacity		6
Proceeds from Unsecured Lines of Credit		1.8
Repayments of Long-term Lines of Credit		(2)
Long-term Line of Credit		$ 1.2
Offshore Support Vessels [Member] | OSV Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Number Of Equipments Delivered | equipment		1
Payments to Acquire Machinery and Equipment		$ 14.3

Commitments And Contingencies (

Commitments And Contingencies (Narrative) (Details) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2015USD ($)equipment	Jun. 30, 2015USD ($)equipment	Dec. 31, 2013claim	Dec. 31, 2012claim	Dec. 31, 2011claim	Dec. 31, 2010claim
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 432.8	$ 432.8
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	135.9	135.9
Unrecorded Unconditional Purchase Obligation, Due in Second Years	233.2	233.2
Unrecorded Unconditional Purchase Obligation, Due in Third Year	38.8	38.8
Unrecorded Unconditional Purchase Obligation Due in Fourth Year	19	19
Unrecorded Unconditional Purchase Obligation, Due in Fifth Year	5.9	5.9
Unconditional Purchase Obligation, Amount Eligible for Termination	6.8	$ 6.8
Unconditional Purchase Obligations, Liquidated Damages	0.7
Wunstell Action [Member]
Loss Contingencies [Line Items]
Claims Filed | claim						2
Master Complaints [Member]
Loss Contingencies [Line Items]
Claims Filed | claim						1
Multi-district Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed | claim					10
Darnell Alexander [Member]
Loss Contingencies [Line Items]
Claims Filed | claim				410	117
Abney Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed | claim				668
Abood Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed | claim			174
Prejean [Member]
Loss Contingencies [Line Items]
Loss Contingency, Claims Settled, Number		3
Offshore Support Vessels [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 142.3	$ 142.3
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	17	17
Inland River Liquid Tank Barges - 30,000 Barrel [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 1.7	$ 1.7
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	2	2
Inland River Liquid Tank Barges - 10,000 Barrel [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 6.9	$ 6.9
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	8	8
Inland River Towboats [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 6.8	$ 6.8
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	3	3
U.S.-flag Product Tankers [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 190.3	$ 190.3
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	3	3
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	$ 64.8	$ 64.8
Unrecorded Unconditional Purchase Obligation, Due in Second Years	146.9	146.9
Unrecorded Unconditional Purchase Obligation, Due in Third Year	20.5	20.5
U.S. Flag Articulated Tug-Barge [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 41.9	$ 41.9
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	1	1
U.S.-flag Harbor Tugs [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 20.5	$ 20.5
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	2	2
Other Machinery and Equipment [Member]
Loss Contingencies [Line Items]
Total unfunded capital commitments	$ 22.4	$ 22.4

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014	Jul. 24, 2015	Apr. 15, 2015	Apr. 09, 2015	Mar. 31, 2015
Debt Instrument [Line Items]
Debt extinguishment losses	$ (29,536)	$ 0	$ (29,536)	$ 0
Debt Issuance Cost			12,600
Repayments of long-term debt					$ 3,900
Net borrowings (repayments) on inventory financing arrangements			(2,661)	$ (6,294)
Proceeds from Lines of Credit			4,900
Repayments of Lines of Credit			(8,900)
Letters of Credit Outstanding, Amount	$ 31,600		$ 31,600
Seven Point Three Seven Five Percentage Senior Notes Due Two Thousand Nineteen Member
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%		7.375%
Debt Instrument, Repurchased Face Amount	$ 14,000		$ 14,000
Debt Instrument, Repurchase Amount	14,400		14,400
Long-term Debt									$ 219,500
Title Eleven Bonds [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	99,900		99,900
Debt extinguishment losses			29,000
Redemption Premium			20,500
Subsequent Event [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount						$ 6,500
Sea-Vista [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							$ 300,000
Debt Issuance Cost			3,100
Sea-Vista [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							100,000
Line of Credit Facility, Fair Value of Amount Outstanding	30,000		30,000
Sea-Vista [Member] | Term A-1 Loan [Member]
Debt Instrument [Line Items]
Long-term Debt	80,000		$ 80,000
Debt Instrument, Unused Borrowing Capacity, Amount							80,000
Debt Instrument, Periodic Payment, Principal			1.25%
Repayments of long-term debt			$ 1,000
Sea-Vista [Member] | Term A-2 Loan [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 25,000		$ 25,000
Debt Instrument, Unused Borrowing Capacity, Amount							$ 120,000
Debt Instrument, Periodic Payment, Principal			2.50%
Sea-Vista [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Prepayment Increments			$ 1,000
Sea-Vista [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Mandatory Prepayment Balance			75,000
Illinois Corn Processing LLC [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 20,000
Debt Issuance Cost			$ 300
Line of Credit Facility, Current Borrowing Capacity								$ 30,000
London Interbank Offered Rate (LIBOR) [Member] | Sea-Vista [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.00%
London Interbank Offered Rate (LIBOR) [Member] | Sea-Vista [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.75%
London Interbank Offered Rate (LIBOR) [Member] | Illinois Corn Processing LLC [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.00%
Base Rate [Member] | Sea-Vista [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.25%
Base Rate [Member] | Sea-Vista [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.75%

Fair Value Measurements (Financ

Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction Reserve Funds & Title XI Reserve Funds	$ 275,131		$ 278,022
Marketable security gains (losses), net	6,000	$ 2,100
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	29,411
Derivative instruments (included in other receivables)	472
Construction Reserve Funds & Title XI Reserve Funds	275,131
Short sales of marketable securities	9,155
Derivative instruments (included in other current liabilities)	2,048
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Derivative instruments (included in other receivables)	259
Construction Reserve Funds & Title XI Reserve Funds	0
Short sales of marketable securities	0
Derivative instruments (included in other current liabilities)	423
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Derivative instruments (included in other receivables)	0
Construction Reserve Funds & Title XI Reserve Funds	0
Short sales of marketable securities	0
Derivative instruments (included in other current liabilities)	$ 0

Fair Value Measurements (Estima

Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	$ 433,827	$ 434,183	$ 453,415	$ 527,435
Investments, at cost, in 50% or less owned companies (included in other assets), Carrying Amount	10,442
Notes receivable from other business ventures (included in other receivables and other assets), Carrying Amount	25,512
Long-term debt, including current portion, Carrying Amount	924,593
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Fair Value Disclosure	433,827
Debt Instrument, Fair Value Disclosure	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Fair Value Disclosure	0
Debt Instrument, Fair Value Disclosure	985,610
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Fair Value Disclosure	0
Debt Instrument, Fair Value Disclosure	$ 0
Two Point Five Percentage Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Three Point Zero Percentage Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%

Fair Value Measurements (Non-Fi

Fair Value Measurements (Non-Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction in progress	$ 399,033	$ 318,000
Offshore Support Vessels [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	6,600
Offshore Support Vessels [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction in progress	0
Offshore Support Vessels [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction in progress	200
Offshore Support Vessels [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction in progress	0
VA&E [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	0
VA&E [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	6,938
VA&E [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	$ 0

Derivative Instruments And He44

Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 731
Derivative Liability	2,471
Options on equities and equity indices
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	1,175
Foreign currency exchange, option and future contracts
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	82
Interest rate swap agreements
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	341
Commodity swap, option and future contracts, exchange traded
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	472
Derivative Liability	873
Commodity swap, option and future contracts, non-exchange traded
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	259
Derivative Liability	$ 0

Derivative Instruments And He45

Derivative Instruments And Hedging Strategies (Narrative) (Details) - Jun. 30, 2015 - Cash Flow Hedging [Member] - USD ($) $ in Millions	Total
Mexmar [Member]
Derivative [Line Items]
Fixed interest rate range, minimum	1.71%
Fixed interest rate range, maximum	2.05%
Derivative, Notional Amount	$ 124.5
Sea-Cat Crewzer II [Member]
Derivative [Line Items]
Fixed interest rate	1.52%
Derivative, Notional Amount	$ 26.8
Sea Cat Crewzer [Member]
Derivative [Line Items]
Fixed interest rate	1.52%
Derivative, Notional Amount	$ 23.8
SCFCo Holdings [Member]
Derivative [Line Items]
Fixed interest rate range, minimum	1.53%
Fixed interest rate range, maximum	1.62%
Derivative, Notional Amount	$ 13.2
Seajon [Member]
Derivative [Line Items]
Fixed interest rate	2.79%
Derivative, Notional Amount	$ 33.9

Derivative Instruments And He46

Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Derivative gains (losses), net	$ (1,570)	$ (143)
Options on equities and equity indices
Derivative [Line Items]
Derivative gains (losses), net	(442)	22
Forward Currency Exchange, Option And Future Contracts [Member]
Derivative [Line Items]
Derivative gains (losses), net	(302)	187
Interest rate swap agreements
Derivative [Line Items]
Derivative gains (losses), net	(5)	(135)
Commodity swap, option and future contracts, exchange traded
Derivative [Line Items]
Derivative gains (losses), net	(2,271)	950
Commodity swap, option and future contracts, non-exchange traded
Derivative [Line Items]
Derivative gains (losses), net	1,450	$ (1,167)
Not Designated as Hedging Instrument [Member] | Forward Currency Exchange, Option And Future Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,500
Not Designated as Hedging Instrument [Member] | Interest rate swap agreements
Derivative [Line Items]
Derivative, Fixed Interest Rate	3.00%
Derivative, Notional Amount	$ 8,100
Not Designated as Hedging Instrument [Member] | OSV Partners [Member] | Interest rate swap agreements
Derivative [Line Items]
Derivative, Lower Fixed Interest Rate Range	1.89%
Derivative, Higher Fixed Interest Rate Range	2.27%
Derivative, Notional Amount	$ 45,600
Not Designated as Hedging Instrument [Member] | Dynamic Offshore Drilling Ltd [Member] | Interest rate swap agreements
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.30%
Derivative, Notional Amount	$ 88,500
Not Designated as Hedging Instrument [Member] | Dorian LPG [Member] | Interest rate swap agreements
Derivative [Line Items]
Derivative, Lower Fixed Interest Rate Range	2.96%
Derivative, Higher Fixed Interest Rate Range	5.40%
Derivative, Notional Amount	$ 116,500

Stock Repurchases (Details)

Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Common Stock, par value		$ 0.01	$ 0.01
Treasury Stock, Shares, Acquired		284,227
Treasury Stock, Value, Acquired, Cost Method		$ 19.9
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 130.1
Restricted Stock [Member]
Treasury Stock, Shares, Acquired		40,859
Treasury Stock, Value, Acquired, Cost Method		$ 3
Subsequent Event [Member]
Treasury Stock, Shares, Acquired	107,018
Treasury Stock, Value, Acquired, Cost Method	$ 6.9

Noncontrolling Interests in S48

Noncontrolling Interests in Subsidiaries (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)equipment	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)equipment	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 104,651		$ 104,651		$ 117,993
Net Income (Loss)	(8,501)	$ 27,525	(26,402)	$ 41,240
Net Income (Loss) Attributable to Noncontrolling Interest	(9,188)	$ 6,458	(7,520)	8,664
Illinois Corn Processing LLC [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries					16,397
Offshore Marine Services [Member] | Windcat Workboats Ltd. [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	8,502		8,502		7,527
Assets, Net	$ 34,000		34,000
Net Income (Loss)			3,600	(100)
Net Income (Loss) Attributable to Noncontrolling Interest			$ 900
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	25.00%		25.00%
Offshore Marine Services [Member] | Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 839		$ 839		1,323
Inland River Services [Member] | Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	1,094		1,094		1,088
Shipping Services [Member] | Sea-Vista [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	73,043		73,043		89,680
Assets, Net	$ 149,100		149,100
Net Income (Loss)			$ (25,900)	4,100
Net Income (Loss) Attributable to Noncontrolling Interest				2,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%		49.00%
Illinois Corn Processing LLC [Member] | Illinois Corn Processing LLC [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 20,764		$ 20,764
Assets, Net	$ 69,200		69,200
Net Income (Loss)			14,600	23,800
Net Income (Loss) Attributable to Noncontrolling Interest			$ 4,400	$ 6,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	30.00%		30.00%
Other Segments [Member] | Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 409		$ 409		$ 1,978
Minimum [Member] | Offshore Marine Services [Member] | Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	1.80%		1.80%
Minimum [Member] | Inland River Services [Member] | Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	3.00%		3.00%
Minimum [Member] | Other Segments [Member] | Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	5.00%		5.00%
Maximum [Member] | Offshore Marine Services [Member] | Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	33.30%		33.30%
Maximum [Member] | Inland River Services [Member] | Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	51.80%		51.80%
Maximum [Member] | Other Segments [Member] | Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	14.60%		14.60%
U.S.-flag Product Tankers [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	3		3
U.S.-flag Product Tankers [Member] | Shipping Services [Member] | Sea-Vista [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity | equipment	3		3

Multiemployer Pension Plans (De

Multiemployer Pension Plans (Details) £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2011USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2015GBP (£)	Sep. 30, 2014USD ($)
American Maritime Officers Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefit plans, withdrawal liability				$ 39.9
United Kingdom Merchant Navy Ratings Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefit Expense	$ 0.4
Pension And Other Postretirement Benefit Plans, Total Funding Deficit		$ 510.6	£ 325
Pension and Other Postretirement Benefit Plans, Allocated Share of Funding Deficit		$ 6.6	£ 4.2

Share Based Compensation (Share

Share Based Compensation (Share Based Compensation Plans) (Details) - Jun. 30, 2015 - shares shares in Thousands	Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Director stock awards granted	1,625
Employee Stock Purchase Plan shares issued	20,470
Restricted stock awards granted	135,150
Restricted stock awards forfeited	0
Shares released from Deferred Compensation Plan	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding as of December 31, 2014	1,546,508
Stock Option, Granted	107,175
Stock Option, Exercised	(40,128)
Stock Option, Expired	(1,315)
Stock Options, Outstanding as of June 30, 2015	1,612,240
Shares available for future grants and ESPP purchases as of June 30, 2015	862,908

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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Operating Revenues	$ 281,609	$ 328,224	$ 542,253	$ 638,241
Costs and Expenses [Abstract]
Administrative and general	38,674	34,686	77,561	72,763
Depreciation and amortization	32,079	33,220	63,509	66,612
Total costs and expenses	278,496	299,812	547,961	590,257
Gains (Losses) on Assets Dispositions and Impairments, Net	4,386	4,295	(460)	8,973
Operating Income (Loss)	7,499	32,707	(6,168)	56,957
Other Income and Expenses [Abstract]
Derivative gains (losses), net	1,426	94	(1,570)	(143)
Foreign currency gains (losses), net	2,436	1,720	443	1,521
Other Nonoperating Income (Expense)	4,433	10,213	4,389	6,558
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	1,064	(512)	4,963	1,709
Income (Loss) Before Income Tax Expense (Benefit) and Equity in Earnings (Losses) of 50% or Less Owned Companies	(9,410)	41,037	(43,164)	58,906
Capital Expenditures			132,128	273,669
Property, Plant and Equipment, Gross	2,100,309		2,100,309		$ 2,086,957
Accumulated depreciation	(954,931)		(954,931)		(902,284)
Construction in progress	399,033		399,033		318,000
Net property and equipment	1,544,411		1,544,411		1,502,673
Inventories	19,736		19,736		22,783
Goodwill	62,686		62,686		62,759
Intangible Assets, Net	30,742		30,742		32,727
Total assets	3,177,480	3,295,993	3,177,480	3,295,993	$ 3,245,033
Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	96,689	138,214	190,110	267,171
Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	60,543	55,200	116,379	112,211
Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	55,674	53,575	107,081	105,976
Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	48,371	72,798	87,969	131,454
Other Income and Expenses [Abstract]
Sales Revenue, Goods, Net			82,300	126,100
Cost of Goods Sold			68,000	98,200
Inventory, Raw Materials	1,700	2,200	1,700	2,200
Inventory, Work in Process	1,600	1,300	1,600	1,300
Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	20,332	8,437	40,714	21,429
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	281,609	328,224	542,253	638,241
Costs and Expenses [Abstract]
Operating Expenses	207,743	231,906	406,891	450,882
Administrative and general	38,674	34,686	77,561	72,763
Depreciation and amortization	32,079	33,220	63,509	66,612
Total costs and expenses	278,496	299,812	547,961	590,257
Gains (Losses) on Assets Dispositions and Impairments, Net	4,386	4,295	(460)	8,973
Operating Income (Loss)	7,499	32,707	(6,168)	56,957
Other Income and Expenses [Abstract]
Derivative gains (losses), net	1,426	94	(1,570)	(143)
Foreign currency gains (losses), net	2,436	1,720	443	1,521
Other Nonoperating Income (Expense)	4,433	10,213	4,389	6,558
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	1,064	(512)	4,963	1,709
Capital Expenditures			132,128	273,669
Property, Plant and Equipment, Gross	2,100,309	2,216,627	2,100,309	2,216,627
Accumulated depreciation	(954,931)	(888,442)	(954,931)	(888,442)
Property, Plant and Equipment, Net In Service	1,145,378	1,328,185	1,145,378	1,328,185
Construction in progress	399,033	297,523	399,033	297,523
Net property and equipment	1,544,411	1,625,708	1,544,411	1,625,708
Investments, at Equity, and Advances to 50% or Less Owned Companies	482,302	484,164	482,302	484,164
Inventories	19,736	20,207	19,736	20,207
Goodwill	62,686	18,012	62,686	18,012
Intangible Assets, Net	30,742	10,754	30,742	10,754
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	299,234	311,256	299,234	311,256
Operating Segments [Member] | Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	96,715	138,247	190,171	267,248
Costs and Expenses [Abstract]
Operating Expenses	72,173	93,755	146,528	187,798
Administrative and general	12,655	13,426	26,214	28,586
Depreciation and amortization	15,692	16,448	31,058	32,752
Total costs and expenses	100,520	123,629	203,800	249,136
Gains (Losses) on Assets Dispositions and Impairments, Net	3,455	3,526	(3,194)	11,264
Operating Income (Loss)	(350)	18,144	(16,823)	29,376
Other Income and Expenses [Abstract]
Derivative gains (losses), net	4	(70)	(5)	(131)
Foreign currency gains (losses), net	1,907	1,322	1,890	1,429
Other Nonoperating Income (Expense)	43	14,739	(103)	14,739
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,826	2,244	5,801	4,885
Segment Profit (Loss)	4,430	36,379	(9,240)	50,298
Capital Expenditures			53,118	46,621
Property, Plant and Equipment, Gross	1,072,937	1,154,174	1,072,937	1,154,174
Accumulated depreciation	(525,937)	(499,092)	(525,937)	(499,092)
Property, Plant and Equipment, Net In Service	547,000	655,082	547,000	655,082
Construction in progress	103,992	91,824	103,992	91,824
Net property and equipment	650,992	746,906	650,992	746,906
Investments, at Equity, and Advances to 50% or Less Owned Companies	126,601	129,775	126,601	129,775
Inventories	5,583	5,571	5,583	5,571
Goodwill	13,367	13,367	13,367	13,367
Intangible Assets, Net	1,113	2,784	1,113	2,784
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	103,444	154,188	103,444	154,188
Total assets	901,100	1,052,591	901,100	1,052,591
Operating Segments [Member] | Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	61,150	56,007	117,757	113,966
Costs and Expenses [Abstract]
Operating Expenses	48,556	45,047	90,069	84,721
Administrative and general	3,765	3,835	7,649	8,172
Depreciation and amortization	7,362	7,564	14,251	14,934
Total costs and expenses	59,683	56,446	111,969	107,827
Gains (Losses) on Assets Dispositions and Impairments, Net	1,166	810	2,969	1,663
Operating Income (Loss)	2,633	371	8,757	7,802
Other Income and Expenses [Abstract]
Derivative gains (losses), net	177	0	259	0
Foreign currency gains (losses), net	208	474	(913)	147
Other Nonoperating Income (Expense)	0	0	0	(38)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(3,717)	(3,335)	(3,991)	(3,747)
Segment Profit (Loss)	(699)	(2,490)	4,112	4,164
Capital Expenditures			12,702	44,086
Property, Plant and Equipment, Gross	492,508	519,586	492,508	519,586
Accumulated depreciation	(169,677)	(161,091)	(169,677)	(161,091)
Property, Plant and Equipment, Net In Service	322,831	358,495	322,831	358,495
Construction in progress	27,352	32,175	27,352	32,175
Net property and equipment	350,183	390,670	350,183	390,670
Investments, at Equity, and Advances to 50% or Less Owned Companies	100,700	61,653	100,700	61,653
Inventories	2,085	2,309	2,085	2,309
Goodwill	2,500	2,793	2,500	2,793
Intangible Assets, Net	6,461	7,085	6,461	7,085
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	70,975	55,819	70,975	55,819
Total assets	532,904	520,329	532,904	520,329
Operating Segments [Member] | Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	55,674	53,575	107,081	105,976
Costs and Expenses [Abstract]
Operating Expenses	36,124	28,018	73,255	55,015
Administrative and general	6,676	5,421	12,965	11,317
Depreciation and amortization	6,611	7,115	13,346	14,869
Total costs and expenses	49,411	40,554	99,566	81,201
Gains (Losses) on Assets Dispositions and Impairments, Net	0	(41)	0	(41)
Operating Income (Loss)	6,263	12,980	7,515	24,734
Other Income and Expenses [Abstract]
Derivative gains (losses), net	0	0	0	0
Foreign currency gains (losses), net	9	1	(3)	(9)
Other Nonoperating Income (Expense)	187	158	216	(3,775)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,363	1,564	3,504	2,317
Segment Profit (Loss)	8,822	14,703	11,232	23,267
Capital Expenditures			63,421	165,160
Property, Plant and Equipment, Gross	454,076	451,123	454,076	451,123
Accumulated depreciation	(226,127)	(200,908)	(226,127)	(200,908)
Property, Plant and Equipment, Net In Service	227,949	250,215	227,949	250,215
Construction in progress	264,191	171,204	264,191	171,204
Net property and equipment	492,140	421,419	492,140	421,419
Investments, at Equity, and Advances to 50% or Less Owned Companies	206,889	205,110	206,889	205,110
Inventories	878	1,438	878	1,438
Goodwill	1,852	1,852	1,852	1,852
Intangible Assets, Net	0	575	0	575
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	32,208	19,816	32,208	19,816
Total assets	733,967	650,210	733,967	650,210
Operating Segments [Member] | Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	48,371	72,798	87,969	131,454
Costs and Expenses [Abstract]
Operating Expenses	40,588	56,429	73,706	103,703
Administrative and general	509	594	1,071	1,105
Depreciation and amortization	979	1,010	1,959	2,000
Total costs and expenses	42,076	58,033	76,736	106,808
Gains (Losses) on Assets Dispositions and Impairments, Net	0	0	0	0
Operating Income (Loss)	6,295	14,765	11,233	24,646
Other Income and Expenses [Abstract]
Derivative gains (losses), net	50	(1,519)	(778)	(801)
Foreign currency gains (losses), net	0	0	0	0
Other Nonoperating Income (Expense)	4,112	300	4,112	493
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Segment Profit (Loss)	10,457	13,546	14,567	24,338
Capital Expenditures			2,519	2,098
Property, Plant and Equipment, Gross	47,256	44,808	47,256	44,808
Accumulated depreciation	(17,447)	(13,369)	(17,447)	(13,369)
Property, Plant and Equipment, Net In Service	29,809	31,439	29,809	31,439
Construction in progress	3,237	2,156	3,237	2,156
Net property and equipment	33,046	33,595	33,046	33,595
Investments, at Equity, and Advances to 50% or Less Owned Companies	0	0	0	0
Inventories	11,190	9,926	11,190	9,926
Goodwill	0	0	0	0
Intangible Assets, Net	0	0	0	0
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	10,345	13,559	10,345	13,559
Total assets	54,581	57,080	54,581	57,080
Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	20,337	8,437	40,789	21,429
Costs and Expenses [Abstract]
Operating Expenses	11,103	9,464	24,933	21,400
Administrative and general	6,617	3,449	13,753	6,560
Depreciation and amortization	489	82	989	167
Total costs and expenses	18,209	12,995	39,675	28,127
Gains (Losses) on Assets Dispositions and Impairments, Net	(235)	0	(235)	(409)
Operating Income (Loss)	1,893	(4,558)	879	(7,107)
Other Income and Expenses [Abstract]
Derivative gains (losses), net	304	1,500	(472)	767
Foreign currency gains (losses), net	36	53	(4)	62
Other Nonoperating Income (Expense)	40	(5,013)	48	(4,838)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(408)	(985)	(351)	(1,746)
Segment Profit (Loss)	1,865	(9,003)	100	(12,862)
Capital Expenditures			26	123
Property, Plant and Equipment, Gross	3,146	3,760	3,146	3,760
Accumulated depreciation	(2,901)	(769)	(2,901)	(769)
Property, Plant and Equipment, Net In Service	245	2,991	245	2,991
Construction in progress	0	224	0	224
Net property and equipment	245	3,215	245	3,215
Investments, at Equity, and Advances to 50% or Less Owned Companies	48,112	87,626	48,112	87,626
Inventories	0	963	0	963
Goodwill	44,967	0	44,967	0
Intangible Assets, Net	23,168	310	23,168	310
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	61,592	49,232	61,592	49,232
Total assets	178,084	141,346	178,084	141,346
Operating Segments [Member] | Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(638)	(840)	(1,514)	(1,832)
Costs and Expenses [Abstract]
Operating Expenses	(801)	(807)	(1,600)	(1,755)
Administrative and general	8,452	7,961	15,909	17,023
Depreciation and amortization	946	1,001	1,906	1,890
Total costs and expenses	8,597	8,155	16,215	17,158
Gains (Losses) on Assets Dispositions and Impairments, Net	0	0	0	(3,504)
Operating Income (Loss)	(9,235)	(8,995)	(17,729)	(22,494)
Other Income and Expenses [Abstract]
Derivative gains (losses), net	891	183	(574)	22
Foreign currency gains (losses), net	276	(130)	(527)	(108)
Other Nonoperating Income (Expense)	51	29	116	(23)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Capital Expenditures			342	15,581
Property, Plant and Equipment, Gross	30,386	43,176	30,386	43,176
Accumulated depreciation	(12,842)	(13,213)	(12,842)	(13,213)
Property, Plant and Equipment, Net In Service	17,544	29,963	17,544	29,963
Construction in progress	261	(60)	261	(60)
Net property and equipment	17,805	29,903	17,805	29,903
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, Net	0	0	0	0
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	20,670	18,642	20,670	18,642
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] | Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(26)	33	(61)	77
Intersegment Eliminations [Member] | Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(607)	807	(1,378)	1,755
Intersegment Eliminations [Member] | Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] | Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(5)	0	(75)	0
Intersegment Eliminations [Member] | Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	638	(840)	1,514	(1,832)
Segment Reconciling Items [Member]
Other Income and Expenses [Abstract]
Other Income (Expense) not included in Segment Profit (Loss)	25,204	3,697	40,258	5,987
Less Equity Earnings (Loss) included in Segment Profit (Loss)	(1,064)	512	(4,963)	(1,709)
Cash And Near Cash Assets	$ 738,369	$ 825,892	$ 738,369	$ 825,892