Seacor (CKH) 10-Q27 Oct 142014 Q3 Quarterly reportFinancial data

Company Profile

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
Document And Entity Information	Sep. 30, 2014	Oct. 24, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'SEACOR HOLDINGS INC /NEW/	'
Entity Central Index Key	'0000859598	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	18,577,133
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets:	'	'
Cash and cash equivalents	$449,632	$527,435
Restricted cash	13,656	12,175
Marketable securities	43,286	24,292
Receivables:	'	'
Trade, net of allowance for doubtful accounts	215,191	215,768
Other Receivables	57,621	48,181
Inventories	20,896	27,615
Deferred income taxes	116	116
Prepaid expenses and other	11,431	6,701
Total current assets	811,829	862,283
Property and Equipment:	'	'
Property, Plant and Equipment, Gross	2,166,509	2,199,183
Accumulated depreciation	889,993	866,330
Property, Plant and Equipment, Other, Net in Service	1,276,516	1,332,853
Construction in progress	284,362	143,482
Net property and equipment	1,560,878	1,476,335
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	444,826	440,853
Construction Reserve Funds & Title XI Reserve Funds	321,278	261,739
Goodwill	62,904	17,985
Intangible Assets, Net	34,306	12,423
Other Assets	55,049	44,615
Total assets	3,291,070	3,116,233
Current Liabilities:	'	'
Current portion of long-term debt	50,785	45,323
Accounts payable and accrued expenses	90,704	85,477
Other current liabilities	139,999	123,619
Total current liabilities	281,488	254,419
Long-Term Debt	831,163	834,118
Deferred Income Taxes	459,039	457,827
Deferred Gains and Other Liabilities	185,950	144,441
Total liabilities	1,757,640	1,690,805
SEACOR Holdings Inc. stockholdersâ€™ 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; 37,458,240 and 37,219,201 shares issued in 2014 and 2013, respectively	375	372
Additional paid-in capital	1,485,342	1,394,621
Retained earnings	1,155,309	1,095,270
Shares held in Treasury of 17,,314,425 and 16,837,113 in 2014 and 2013, respectively, at cost	1,213,267	1,088,219
Accumulated Other Comprehensive Income (Loss), Net of Tax	-1,891	-1,192
Stockholders' equity attributable to parent, total	1,425,868	1,400,852
Noncontrolling interests in subsidiaries	107,562	24,576
Total equity	1,533,430	1,425,428
Liabilities and stockholders' equity, total	$3,291,070	$3,116,233

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Trade receivables, allowance for doubtful accounts	$3,047	$1,162
Common Stock, par value	$0.01	$0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,461,053	37,219,201
Treasury stock, shares held in treasury	18,416,771	16,837,113
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_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]	'	'	'	'
Operating Revenues	$338,936	$336,784	$977,177	$919,411
Costs and Expenses [Abstract]	'	'	'	'
Operating	237,676	239,540	688,558	680,566
Administrative and general	46,655	31,463	119,418	101,826
Depreciation and amortization	33,604	33,503	100,216	100,834
Total costs and expenses	317,935	304,506	908,192	883,226
Gain (Loss) on Sale of Assets and Asset Impairment Charges	29,869	19,230	38,842	33,550
Operating Income (Loss)	50,870	51,508	107,827	69,735
Other Income (Expense):	'	'	'	'
Interest income	4,463	4,280	14,536	10,665
Interest expense	11,124	10,520	32,985	31,282
Marketable security gains, net	9,693	-1,149	15,494	9,403
Derivative losses, net	-2,538	-303	-2,681	-3,235
Foreign currency losses, net	-3,059	2,230	-1,538	-2,697
Other, net	111	477	6,669	675
Total Other Nonoperating Income (Expense)	-2,454	-4,985	-505	-16,471
Income from Continuing Operations Before Income Tax Expense and Equity in Earnings of 50% or Less Owned Companies	48,416	46,523	107,322	53,264
Income Tax Expense (Benefit)	15,610	15,984	34,985	21,306
Income from Continuing Operations Before Equity in Earnings of 50% or Less Owned Companies	32,806	30,539	72,337	31,958
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	972	230	2,681	7,071
Income from Continuing Operations	33,778	30,769	75,018	39,029
Income (Loss) from Discontinued Operations, Net of Tax	0	0	0	-10,325
Net Income (Loss)	33,778	30,769	75,018	28,704
Net Income (Loss) Attributable to Noncontrolling Interest	6,315	478	14,979	130
Net Income (Loss) attributable to SEACOR Holdings Inc.	27,463	30,291	60,039	28,574
Net Income (Loss) attributable to SEACOR Holdings Inc.:	'	'	'	'
Continuing operations	27,463	30,291	60,039	38,799
Discontinued operations, net of tax	0	0	0	-10,225
Net Income (Loss) attributable to SEACOR Holdings Inc.	$27,463	$30,291	$60,039	$28,574
Basic Earnings Per Common Share of SEACOR Holdings Inc.	'	'	'	'
Continuing operations	$1.43	$1.52	$3.04	$1.96
Discontinued operations	$0	$0	$0	($0.52)
Earnings Per Share, Basic	$1.43	$1.52	$3.04	$1.44
Diluted Earnings Per Common Share of SEACOR Holdings Inc.	'	'	'	'
Continuing operations	$1.28	$1.36	$2.85	$1.92
Discontinued operations	$0	$0	$0	($0.51)
Earnings Per Share, Diluted	$1.28	$1.36	$2.85	$1.41
Weighted Average Common Shares Outstanding:	'	'	'	'
Basic	19,196,121	19,964,695	19,761,620	19,843,778
Diluted	25,627,742	24,601,584	24,374,918	20,198,449

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income Statement (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$33,778	$30,769	$75,018	$28,704
Foreign Currency translation gain (losses)	-3,968	4,050	-1,730	-488
Reclassification of foreign currency translation gains to foreign currency gains (losses), net	0	0	-11	0
Derivative gains on cash flow hedges	171	192	148	572
Reclassification of derivative (gains) losses on cash flow hedges to equity in earnings of 50% or less owned companies	120	-65	335	253
Other Comprehensive Income (Loss), before Tax	-3,677	4,177	-1,258	337
Income tax (expense) benefit	1,139	-1,311	376	-125
Other Comprehensive Income (Loss), Net of Tax	-2,538	2,866	-882	212
Comprehensive Income	31,240	33,635	74,136	28,916
Comprehensive Income attributable to Noncontrolling Interests in subsidiaries	5,893	910	14,796	110
Comprehensive Income attributable to SEACOR Holdings Inc.	$25,347	$32,725	$59,340	$28,806

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement Of Changes In Equity (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	$1,533,430	$1,533,430	$1,425,428
Employee Stock Purchase Plan	'	2,165	'
Exercise of stock options	'	5,035	'
Director stock awards	'	-153	'
Restricted stock	'	223	'
Purchases of treasury shares	'	-127,151	'
Amortization of share awards	'	11,683	'
Cancellation of restricted stock	'	0	'
Purchase of subsidiary shares from noncontrolling interests	'	-3,110	'
Issuance of noncontrolling interest, net of issue costs	'	145,924	'
Dividends paid to noncontrolling interests	'	1,056	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	27,463	60,039	'
Net Income (Loss) Attributable to Noncontrolling Interest	6,315	14,979	'
Net income	33,778	75,018	'
Other comprehensive income	-2,538	-882	'
Common Stock [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	375	375	372
Employee Stock Purchase Plan	'	0	'
Exercise of stock options	'	1	'
Director stock awards	'	0	'
Restricted stock	'	2	'
Purchases of treasury shares	'	0	'
Amortization of share awards	'	0	'
Cancellation of restricted stock	'	0	'
Purchase of subsidiary shares from noncontrolling interests	'	0	'
Issuance of noncontrolling interest, net of issue costs	'	0	'
Dividends paid to noncontrolling interests	'	0	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	0	'
Other comprehensive income	'	0	'
Additional Paid-In Capital [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	1,485,342	1,485,342	1,394,621
Employee Stock Purchase Plan	'	0	'
Exercise of stock options	'	5,034	'
Director stock awards	'	-153	'
Restricted stock	'	200	'
Purchases of treasury shares	'	0	'
Amortization of share awards	'	-11,683	'
Cancellation of restricted stock	'	-83	'
Purchase of subsidiary shares from noncontrolling interests	'	-1,242	'
Issuance of noncontrolling interest, net of issue costs	'	74,810	'
Dividends paid to noncontrolling interests	'	0	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	0	'
Other comprehensive income	'	0	'
Retained Earnings [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	1,155,309	1,155,309	1,095,270
Employee Stock Purchase Plan	'	0	'
Exercise of stock options	'	0	'
Director stock awards	'	0	'
Restricted stock	'	0	'
Purchases of treasury shares	'	0	'
Amortization of share awards	'	0	'
Cancellation of restricted stock	'	0	'
Purchase of subsidiary shares from noncontrolling interests	'	0	'
Issuance of noncontrolling interest, net of issue costs	'	0	'
Dividends paid to noncontrolling interests	'	0	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	-60,039	'
Other comprehensive income	'	0	'
Shares Held In Treasury [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	-1,213,267	-1,213,267	-1,088,219
Employee Stock Purchase Plan	'	2,165	'
Exercise of stock options	'	0	'
Director stock awards	'	0	'
Restricted stock	'	21	'
Purchases of treasury shares	'	-127,151	'
Amortization of share awards	'	0	'
Cancellation of restricted stock	'	83	'
Purchase of subsidiary shares from noncontrolling interests	'	0	'
Issuance of noncontrolling interest, net of issue costs	'	0	'
Dividends paid to noncontrolling interests	'	0	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	0	'
Other comprehensive income	'	0	'
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	-1,891	-1,891	-1,192
Employee Stock Purchase Plan	'	0	'
Exercise of stock options	'	0	'
Director stock awards	'	0	'
Restricted stock	'	0	'
Purchases of treasury shares	'	0	'
Amortization of share awards	'	0	'
Cancellation of restricted stock	'	0	'
Purchase of subsidiary shares from noncontrolling interests	'	0	'
Issuance of noncontrolling interest, net of issue costs	'	0	'
Dividends paid to noncontrolling interests	'	0	'
Comprehensive income:	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	0	'
Other comprehensive income	'	699	'
Non-Controlling Interests In Subsidiaries [Member]	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'
Total equity	107,562	107,562	24,576
Employee Stock Purchase Plan	'	0	'
Exercise of stock options	'	0	'
Director stock awards	'	0	'
Restricted stock	'	0	'
Purchases of treasury shares	'	0	'
Amortization of share awards	'	0	'
Cancellation of restricted stock	'	0	'
Purchase of subsidiary shares from noncontrolling interests	'	-1,868	'
Issuance of noncontrolling interest, net of issue costs	'	71,114	'
Dividends paid to noncontrolling interests	'	1,056	'
Comprehensive income:	'	'	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	-14,979	'
Other comprehensive income	'	$183	'

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Statement of Cash Flows [Abstract]	'	'
Net Cash Provided by Operating Activities of Continuing Operations	$165,711	$134,698
Cash Flows from Investing Activities of Continuing Operations:	'	'
Purchases of property and equipment	311,094	146,483
Proceeds from disposition of property and equipment	187,907	205,735
Investments in and advances to 50% or less owned companies	58,343	91,492
Return of investments and advances from 50% or less owned companies	31,549	10,642
Principal payments on third party leases and notes receivable, net	8,173	-2,604
Net (increase) decrease in restricted cash	1,481	-7,392
Net (increase) decrease in construction reserve funds and title XI reserve funds	59,539	33,392
Business acquisitions, net of cash acquired	35,000	10,540
Net cash used in investing activities of continuing operations	-254,174	-55,534
Cash Flows from Financing Activities of Continuing Operations:	'	'
Repayments of Debt and Capital Lease Obligations	18,969	13,129
Net borrowings (repayments) on inventory financing arrangements	-3,116	4,183
Proceeds from issuance of long term debt, net of offering costs	11,464	10
Common stock acquired for treasury	127,151	0
Cash Received (Paid) For Share Settlements from Spinoff Transactions	0	-357
Proceeds and tax benefits from share award plans	7,403	17,195
Issuance of noncontrolling interests	145,350	40
Purchase of subsidiary shares from noncontrolling interests	2,090	0
Cash received from (dividends paid to) noncontrolling interests, net	-1,056	-3,822
Net cash provided by (used in) financing activities of continuing operations	11,835	4,120
Effect of Exchange Rate Changes on Cash and Cash Equivalents	-1,175	-643
Net Increase (Decrease) in Cash and Cash Equivalents from Continuing Operations	-77,803	82,641
Cash Flows from Discontinued Operations:	'	'
Operating Activities	0	24,298
Investing Activities	0	-8,502
Financing Activities	0	-14,017
Effects of Exchange Rate Changes on Cash and Cash Equivalents	0	143
Net Increase in Cash and Cash Equivalents from Discontinued Operations	0	1,922
Net Increase (Decrease) in Cash and Cash Equivalents	-77,803	84,563
Cash and Cash Equivalents, Beginning of Period	527,435	248,204
Cash and Cash Equivalents, End of Period	$449,632	$332,767

Basis_of_Presentation_and_Acco

Basis of Presentation and Accounting Policy	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Accounting Policy	'
	BASIS OF PRESENTATION AND ACCOUNTING POLICY
	The condensed consolidated financial information for the three and nine months ended September 30, 2014 and 2013 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 September 30, 2014, its results of operations for the three and nine months ended September 30, 2014 and 2013, its comprehensive income for the three and nine months ended September 30, 2014 and 2013, its changes in equity for the nine months ended September 30, 2014, and its cash flows for the nine months ended September 30, 2014 and 2013. 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, 2013.
	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, 2013.
	Discontinued Operations (see Note 15). The Company reports disposed businesses as discontinued operations when it has no continuing interest in the business. Discontinued operations includes the historical financial position, results of operations and cash flows of the operations previously reported as discontinued in the Company's Annual Report on Form 10-K for the year ended December 31, 2013.
	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. Deferred revenues, included in other current liabilities, for the nine months ended September 30 were as follows (in thousands):


		2014				2013
	Balance at beginning of period	$	6,592			$	6,592

	Revenues deferred during the period	202				—

	Balance at end of period	$	6,794			$	6,592

	As of September 30, 2014 and 2013, the Company's deferred revenues 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 as approved by the bankruptcy court. All costs and expenses related to these charters were recognized as incurred.
	Accumulated Other Comprehensive Loss. The components of accumulated other comprehensive loss were as follows:


			SEACOR Holdings Inc. Stockholders' Equity													Noncontrolling
																Interests
			Foreign				Derivative			Other			Total			Foreign			Other			Other
			Currency				Gains (Losses) on									Currency						Comprehensive
			Translation				Cash Flow									Translation						Loss
			Adjustments				Hedges, net									Adjustments
	31-Dec-13		$	(927	)		$	(257	)	$	(8	)	$	(1,192	)	$	395		$	(5	)

	Other comprehensive income (loss)		(1,558		)		483			—			(1,075		)	(183		)	—			$	(1,258	)

	Income tax (expense) benefit		545				(169		)	—			376			—			—			376

	Nine months ended September 30, 2014		$	(1,940	)		$	57		$	(8	)	$	(1,891	)	$	212		$	(5	)	$	(882	)

	New Accounting Pronouncement. On May 28, 2014, the Financial Accounting Standards Board 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, 2016 and early adoption is prohibited. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows.
	Reclassifications. Certain reclassifications of prior period information have been made to conform to the presentation of the current period information. These reclassifications had no effect on net income as previously reported.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 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)	$	43,286		$	—		$	—

	Derivative instruments (included in other receivables)	1,419			5,958			—

	Construction reserve funds and Title XI reserve funds	321,278			—			—

	LIABILITIES
	Short sale of marketable securities (included in other current liabilities)	10,351			—			—

	Derivative instruments (included in other current liabilities)	3,268			864			—

	______________________

	-1	Marketable security gains (losses), net include unrealized gains of $9.7 million and unrealized losses of $1.2 million for the three months ended September 30, 2014 and 2013, respectively, related to marketable security positions held by the Company as of September 30, 2014. Marketable security gains (losses), net include unrealized gains of $15.3 million and $9.4 million for the nine months ended September 30, 2014 and 2013, respectively, related to marketable security positions held by the Company as of September 30, 2014.
	The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2014 were as follows (in thousands):


					Estimated Fair Value
		Carrying			Level 1			Level 2			Level 3
		Amount
	ASSETS
	Cash, cash equivalents and restricted cash	$	463,288		$	463,288		$	—		$	—

	Investments, at cost, in 50% or less owned companies (included in other	13,728			see below
	assets)
	Notes receivable from third parties (included in other receivables and other assets)	22,592			see below

	LIABILITIES
	Long-term debt, including current portion(1)	881,948			—			1,015,744			—

	______________________

	-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, cash equivalents and restricted cash 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 nine months ended September 30, 2014 were as follows (in thousands):


			Level 1			Level 2			Level 3
	ASSETS
	Long-lived assets held for sale(1)		$	—		$	11,700		$	—

	Investment in Witt O'Brien's LLC(2)		—			50,569			—

	______________________

	-1	During the nine months ended September 30, 2014, the Company recognized impairment charges of $3.9 million related to two aircraft following the adjustment of their carrying value to fair value based on the expected sales price of each.

	-2	During the nine months ended September 30, 2014, the Company marked its equity investment in Witt O'Brien's LLC ("Witt O'Brien's") to fair value following its acquisition of a controlling interest (See Note 4). The investment's fair value was based on the Company's purchase price of the acquired interest.

Derivative_Instruments_And_Hed

Derivative Instruments And Hedging Strategies	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 were as follows (in thousands):


		Derivative			Derivative
		Asset			Liability

	Forward currency exchange, option and future contracts	$	—		$	60

	Interest rate swap agreements	—			744

	Commodity swap, option and future contracts:
	Exchange traded	1,418			3,268

	Non-exchange traded	5,959			60

		$	7,377		$	4,132


	Cash Flow Hedges. As of September 30, 2014, the Company had no interest rate swap agreements designated as cash flow hedges. As of September 30, 2014, SCFCo, one of the Company’s Inland River Services 50% or less owned companies, had two interest rate swap agreements with maturities in 2015 that have been designated as cash flow hedges. These instruments call for this company to pay fixed rates of interest ranging from 1.53% to 1.62% on the aggregate amortized notional value of $16.9 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. As of September 30, 2014, SeaJon, one of the Company’s Shipping Services 50% or less owned companies, had an interest rate swap agreement maturing in 2017 that has been designated as a cash flow hedge. The instrument calls for this company to pay a fixed interest rate of 2.79% on the amortized notional value of $35.6 million and receive a variable interest rate based on LIBOR on the amortized notional value. Subsequent to September 30, 2014, Sea-Cat Crewzer and Sea-Cat Crewzer II, two of the Company's Offshore Marine Services 50% or less owned companies, entered into interest rate swap agreements designated as cash flow hedges that mature in 2019. The first instrument calls for Sea-Cat Crewzer to pay a fixed rate of interest of 1.52% on the amortized notional value of $24.8 million and receive a variable interest rate based on LIBOR on the amortized notional value. The second instrument calls for Sea-Cat Crewzer II to pay a fixed rate of interest of 1.52% on the amortized notional value of $28.0 million and receive a variable interest rate based on LIBOR on the amortized notional value. 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.
	Other Derivative Instruments. The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the nine months ended September 30 as follows (in thousands):


		2014			2013
	Options on equities and equity indices	$	22		$	(4,132	)

	Forward currency exchange, option and future contracts	62			(439		)

	Interest rate swap agreements	(169		)	253

	Commodity swap, option and future contracts:
	Exchange traded	(2,996		)	368

	Non-exchange traded	400			715

		$	(2,681	)	$	(3,235	)
	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 of.
	The Company enters and settles forward currency exchange, option and future contracts with respect to various foreign currencies. As of September 30, 2014, the outstanding forward currency exchange contracts translated into a net purchase of foreign currencies with an aggregate U.S. dollar equivalent of $3.5 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 September 30, 2014, the interest rate swaps held by the Company or its 50% or less owned companies were as follows:

	•	The Company has various interest rate swap agreements with maturities ranging from 2014 through 2018 that call for the Company to pay fixed interest rates ranging from 3.00% to 3.05% on an aggregate amortized notional value of $32.3 million and receive a variable interest rate based on LIBOR or Euribor on these aggregate amortized notional values.

	•	Dynamic Offshore, an Offshore Marine Services 50% or less owned company, has an interest rate swap agreement maturing in 2018 that calls for this company to pay a fixed interest rate of 1.30% on the amortized notional value of $95.8 million and receive a variable interest rate based on LIBOR on the amortized notional value.

	•	OSV Partners, an Offshore Marine Services 50% or less owned company, has two interest rate swap agreements maturing in 2020 that call for this company to pay fixed interest rates ranging from 1.89% to 2.27% on the aggregate amortized notional value of $32.6 million and receive a variable interest rate based on LIBOR on the amortized notional value.

	•	Sea-Cat Crewzer, an Offshore Marine Services 50% or less owned company, has an interest rate swap agreement maturing in 2015 that was dedesignated as a cash flow hedge in July 2014. This instrument calls for this company to pay a fixed interest rate of 1.48% on the amortized notional value of $15.7 million and receive a variable interest rate based on LIBOR on the amortized notional value.

	•	Dorian, a Shipping Services 50% or less owned company, has six interest rate swap agreements with maturities ranging from 2018 to 2020 that call for this company to pay fixed rates of interest ranging from 2.96% to 5.40% on the aggregate amortized notional value of $122.6 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) to protect its raw material and finished goods inventory balance from market changes. In the Company’s agricultural commodity trading and logistics business, fixed price future purchase and sale contracts for sugar are included in the Company’s non-exchange traded derivative positions. The Company enters into exchange traded positions to protect these purchase and sale contracts as well as its inventory balances from market changes. As of September 30, 2014, the net market exposure to corn and sugar under these contracts was not material. The Company also enters into exchange traded positions (primarily natural gas, heating oil, crude oil, gasoline, corn and sugar) to provide value to the Company should there be a sustained decline in the price of commodities that could lead to a reduction in the market values and cash flows of the Company’s Offshore Marine Services, Inland River Services and Shipping Services businesses. As of September 30, 2014, none of these types of positions were outstanding.

Business_Acquisitions

Business Acquisitions	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Business Acquisitions	'
	BUSINESS ACQUISITIONS
	C-Lift Acquisition. On June 6, 2013, the Company acquired a controlling interest in C-Lift through the acquisition of its partner's 50% equity interest for $13.3 million in cash. C-Lift owned and operated two liftboats in the U.S. Gulf of Mexico. 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 no goodwill being recorded. The preliminary fair value analysis was finalized in March 2014.
	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 (see Note 6). 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.
	Purchase Price Allocation. The allocation of the purchase price for the Company’s acquisition for the nine months ended September 30, 2014 was as follows (in thousands):


			2014
	Trade and other receivables		$	31,079

	Other current assets		1,925

	Property and Equipment		519

	Investments, at Equity, and Advances to 50% or Less Owned Companies		(49,968		)
	Goodwill		44,967

	Intangible Assets (primarily customer relationships)		24,901

	Other Assets		111

	Accounts payable		(1,709		)
	Other current liabilities		(12,274		)
	Long-Term Debt		(3,266		)
	Deferred Income Taxes		91

	Other Liabilities		(1,376		)
	Purchase price(1)		$	35,000

	______________________

	-1	Purchase price is net of cash acquired of $0.4 million.

Equipment_Acquisitions_Disposi

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies	9 Months Ended
	Sep. 30, 2014
Equipment Acquisitions, Dispositions And Depreciation And Impairment Policies [Abstract]	'
Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies	'
	EQUIPMENT ACQUISITIONS, DISPOSITIONS AND DEPRECIATION AND IMPAIRMENT POLICIES
	During the nine months ended September 30, 2014, capital expenditures were $311.1 million, including $151.0 million of progress payments toward the construction of three U.S.-flag product tankers. Equipment deliveries during the period included three crew boats, two supply boats, one wind farm utility vessel, 65 inland river dry-cargo barges, one inland river towboat and one foreign-flag short-sea container/RORO vessel.
	During the nine months ended September 30, 2014, the Company sold six crew boats, four supply boats, one liftboat, one wind farm utility vessel, 60 dry-cargo barges, three inland river towboats, one U.S.-flag product tanker, which was leased back, one foreign-flag short-sea container/RORO vessel and other property and equipment for net proceeds of $207.7 million ($182.1 million in cash and $25.6 million in seller financing) and gains of $93.0 million, of which $39.2 million were recognized currently and $53.8 million were deferred. In addition, the Company recognized previously deferred gains of $3.5 million. The Company also received deposits of $5.8 million related to future dry-cargo barge sales.
	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 nine months ended September 30 was as follows (in thousands):


		2014			2013
	Balance at beginning of period	$	124,763		$	111,514
	Balance at beginning of period	$	124,763		$	111,514
	Adjustments to deferred gains arising from asset sales	53,832			14,609
	Adjustments to deferred gains arising from asset sales	53,832			14,609
	Amortization of deferred gains included in operating expenses as a reduction to rental expense	(12,196		)	(7,707		)
	Amortization of deferred gains included in gains on asset dispositions and impairments, net	(3,484		)	(2,146		)
	Balance at end of period	$	162,915		$	116,270
	Balance at end of period	$	162,915		$	116,270
	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 September 30, 2014, 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 and deck barges	20
	Inland river liquid tank barges	25
	Inland river towboats	25
	U.S.-flag product tankers	25
	Short-sea Container/RORO(1) vessels	20
	Harbor tugs	25
	Ocean liquid tank barges	25
	Terminal and manufacturing facilities	20
	______________________

	-1	Roll on/Roll off ("RORO").
	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 nine months ended September 30, 2014, the Company recognized impairment charges of $3.9 million related to two aircraft.

Investments_At_Equity_And_Adva

Investments, At Equity, And Advances To 50% Or Less Owned Companies	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014, Mexmar purchased two offshore support vessels from the Company for $32.0 million ($6.4 million in cash and $25.6 million in seller financing). During the nine months ended September 30, 2014, Mexmar repaid $6.7 million of the seller financing.
	SEA-Cat Crewzer II. Sea-Cat Crewzer II was formed to own and operate two high speed catamaran crew boats. During the nine months ended September 30, 2014, the Company received distributions of $14.0 million.
	SEA-Cat Crewzer. Sea-Cat Crewzer was formed to own and operate two high speed catamaran crew boats. During the nine months ended September 30, 2014, the Company received distributions of $3.2 million.
	OSV Partners. OSV Partners was formed to own and operate six offshore support vessels. During the nine months ended September 30, 2014, the Company contributed additional capital of $3.5 million to fund certain capital acquisitions. During the nine months ended September 30, 2014, OSV Partners purchased two offshore support vessels from the Company for $27.7 million in cash.
	SCFCo Holdings. SCFCo Holdings 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 nine months ended September 30, 2014, the Company and its partner each contributed additional capital of $16.2 million and provided shareholder loans of $23.1 million. As of September 30, 2014, the Company had outstanding loans to SCFCo Holdings of $27.9 million. During the nine months ended September 30, 2014, SCFCo Holdings purchased 60 dry-cargo barges and three inland river towboats from the Company for $41.4 million and repaid $1.0 million of working capital advances.
	SeaJon. SeaJon owns an articulated tug-barge operating in the Great Lakes trade. During the nine months ended September 30, 2014, the Company and its partner each contributed additional capital of $2.3 million to fund certain capital acquisitions.
	Avion. Avion is a distributor of aircraft and aircraft related parts. During the nine months ended September 30, 2014, Avion repaid $4.0 million of outstanding notes to the Company.
	Witt-O'Brien's. Witt-O'Brien's is a global leader in preparedness, crisis management, and disaster response and recovery. During the nine months ended September 30, 2014, the Company received distributions of $0.4 million from Witt-O'Brien's. On July 11, 2014, the Company acquired a controlling interest in Witt-O'Brien's through the acquisition of its partner's 45.8% equity interest for $35.4 million (see Note 4).
	Cleancor. On August 20, 2013, CLEANCOR Energy Solutions LLC ("Cleancor") was established to be a full service solution provider delivering clean fuel to end users. During the nine months ended September 30, 2014, the Company contributed capital of $4.8 million to Cleancor to fund its start-up operations and provide capital for future investments.
	Other. During the nine months ended September 30, 2014, the Company received a capital distribution of $2.1 million from one of Inland River Services' 50% or less owned companies, made capital contributions of $1.2 million, received distributions of $0.2 million and loaned $0.7 million to certain Offshore Marine Services' 50% or less owned companies and contributed capital of $0.2 million and loaned $1.5 million to certain of its industrial aviation businesses in Asia.
	Guarantees. The Company has guaranteed the payment of amounts owed by one of its 50% or less owned companies under a vessel charter, has guaranteed amounts owed under banking facilities by certain of its 50% or less owned companies, and has guaranteed a construction contract for one of its 50% or less owned companies. As of September 30, 2014, the total amount guaranteed by the Company under these arrangements was $109.1 million. In addition, as of September 30, 2014, the Company had uncalled capital commitments to two of its 50% or less owned companies for a total of $2.3 million.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
Commitments And Contingencies	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	As of September 30, 2014, the Company's unfunded capital commitments were $520.5 million and included: $201.6 million for 18 offshore support vessels; $1.3 million for two inland river tank barges; $3.3 million for four inland river towboats; $230.2 million for three U.S.-flag product tankers; $71.3 million for one U.S.-flag articulated tug-barge; and $12.8 million for other equipment and improvements. These commitments are payable as follows: $48.0 million is payable during the remainder of 2014; $426.0 million is payable during 2015-2016; and $46.5 million is payable during 2017-2018.
	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, must 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. The Clean-Up Responder Defendants’ deadline to work with the Plaintiffs’ Steering Committee in the MDL and provide the Court with a detailed listing regarding compliance with the pretrial order is November 14, 2014. 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 is 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 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 seek 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, Halliburton Energy Services, Inc., and M-I L.L.C. 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 have 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. 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 bringing a claim to the Medical Benefits Claims Administrator is one year from the effective date of the Settlement. Although neither the Company, ORM, or 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, barring any further successful appeal, 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 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.
	On January 29, 2013, HEPACO, LLC ("HEPACO"), served a demand for arbitration upon ORM, in which HEPACO claimed that ORM owed HEPACO an additional fee of $20,291,178.92 under the parties' Management Services Agreement (“MSA”), dated June 1, 2010. HEPACO claimed that the MSA required ORM to pay HEPACO an additional fee of 30% of total charges paid under the MSA ("Surcharge") to compensate HEPACO for U.S. Longshoremen's and Harbor Workers' insurance or Jones Act insurance and related risks attendant to the work when a contract requires labor to be performed over, adjoining and/or in water. On June 23, 2014, ORM and HEPACO entered into an agreement to settle HEPACO's claims in the arbitration without a material impact to the Company's results of operations or cash flows and, on July 2, 2014, the HEPACO arbitration was dismissed with prejudice.
	ORM is defending against two collective action lawsuits, each asserting failure to pay overtime with respect to individuals who provided service on the Deepwater Horizon oil spill response (the “DPH FLSA Actions”) under the Fair Labor Standards Act (“FLSA”). These cases, Dennis Prejean v. O'Brien's Response Management Inc. (E.D. La., Case No.: 2:12-cv-01045) (the “Prejean Action”) and Himmerite et al. v. O'Brien's Response Management Inc. et al. (E.D. La., Case No.: 2:12-cv-01533) (the “Himmerite Action”), were each brought on behalf of certain individuals who worked on the Deepwater Horizon oil spill response and who were classified as independent contractors. The Prejean and Himmerite Actions were each filed in the United States District Court for the Eastern District of Louisiana and then subsequently consolidated with the overall MDL, in which the Himmerite Action was stayed pursuant to procedures of the MDL. However, both the Prejean and Himmerite Actions were severed from the MDL on September 19, 2013, and referred to a Magistrate Judge for pretrial case management, including issuing a scheduling order, overseeing discovery, and any other preliminary matters. On October 31, 2013, ORM filed an answer in the Himmerite Action. In the Himmerite Action, pursuant to an earlier tolling order entered by the Court, the limitations periods for potential plaintiffs to opt-in to the action has been tolled pending further action by the Court. In the Prejean Action, ORM has answered the complaint and a scheduling order has been issued. On November 6, 2013, the Court conditionally certified a collective class in the Prejean Action. On December 9, 2013 the Court approved a jointly-submitted form notice and authorized the issuance of notice to all members of the conditionally certified class in the Prejean Action. On December 20, 2013, ORM served plaintiffs’ counsel with a list containing information for approximately 330 potential class members in the Prejean Action. The deadline for plaintiffs to file executed consent forms with the Court has expired. As of February 28, 2014 the Court-ordered deadline for potential class members to opt into the class, 142 individuals have opted in. Although the Court has conditionally certified the Prejean class, the Court has not made a final ruling on whether a class exists. The Company intends to vigorously defend its position that a class should not be certified, and intends on filing a motion to decertify the Prejean class. The Court has also not yet ruled on any of the merits of Plaintiffs’ claims. The Company does not expect the potential exposure, if any, resulting from these DPH FLSA Actions will have a material impact on the Company's results of operations or cash flows, but believes the actions are without merit and will continue to vigorously defend against them.
	In a related action, 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”), which was also filed in the United States District Court for the Eastern District of Louisiana and in which plaintiffs alleged claims similar to those alleged in the Prejean and Himmerite Actions, the parties reached a full and final settlement agreement on February 13, 2014 with respect to all of the Plaintiff’s individual claims for an undisclosed amount. On April 11, 2014, the Court approved the parties’ settlement and dismissed the Singleton Action with prejudice in its entirety. The Court also ordered that the tolling order which had been entered in the Singleton Action expired as of April 11, 2014.

	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. Such potential liabilities may not exceed the consideration received by the Company for the SES Business Transaction and the Company currently is indemnified under contractual agreements with BP.
	During the nine months ended September 30, 2014, the Company received net litigation settlement proceeds of $14.7 million from an equipment supplier relating to the May 2008 mechanical malfunction and fire onboard the SEACOR Sherman, an anchor handling towing supply vessel then under construction. Upon settlement of the litigation, the Company recognized a gain of $14.7 million, which is included in other income (expense) in the accompanying condensed consolidated statements of income.
	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.

Multiemployer_Pension_Plans

Multiemployer Pension Plans	9 Months Ended
Multiemployer Pension Plans	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Multiemployer Pension Plans	'
	MULTI-EMPLOYER PENSION PLANS
	During the nine months ended September 30, 2014, the Company received notification from the American Maritime Officers Pension Plan (the "AMOPP”) that the Company's withdrawal liability as of September 30, 2013 was $46.5 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 September 30, 2014, 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.

LongTerm_Debt

Long-Term Debt	9 Months Ended
Long-Term Debt	Sep. 30, 2014
Long-term Debt and Capital Lease Obligations [Abstract]	'
Long-Term Debt	'
	LONG-TERM DEBT
	As of September 30, 2014, the Company had outstanding letters of credit totaling $18.2 million with various expiration dates through 2018.
	During the nine months ended September 30, 2014, the Company made scheduled payments on long-term debt of $9.6 million and made net repayments of $3.1 million under inventory financing arrangements. In addition, Witt O'Brien's received advances of $11.5 million and made repayments of $9.4 million on its revolving credit facility (see Note 4).
	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 nine months ended September 30, 2014, the Company did not repurchase any of its 7.375% Senior Notes due 2019.

Stock_Repurchases

Stock Repurchases	9 Months Ended
Stock Repurchases	Sep. 30, 2014
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 nine months ended September 30, 2014, the Company acquired 1,609,496 shares of Common Stock for treasury for an aggregate purchase price of $127.2 million. During the nine months ended September 30, 2014, SEACOR’s Board of Directors increased the Company's authority to repurchase Common Stock to $150.0 million. As of September 30, 2014, the remaining authority under the repurchase plan was $90.5 million.
	On September 23, 2014, the Company executed a purchase agreement whereby the Company appointed Goldman, Sachs & Co. as broker to purchase Common Stock in compliance with the requirements of Rule 10b5-1(c)(l)(i) for the period October 1, 2014 through October 28, 2014. Subsequent to September 30, 2014 and through October 24, 2014, the Company purchased 472,200 shares of Common Stock for treasury for an aggregate purchase price of $35.7 million.

Noncontrolling_Interests_in_Su

Noncontrolling Interests in Subsidiaries (Notes)	9 Months Ended
	Sep. 30, 2014
Noncontrolling Interest [Abstract]	'
Noncontrolling Interests in Subsidiaries Disclosure [Text Block]	'

	11	NONCONTROLLING INTERESTS IN SUBSIDIARIES
	Noncontrolling interests in the Company's consolidated subsidiaries were as follows (in thousands):


		Noncontrolling Interests				September 30, 2014		December 31, 2013
	Offshore Marine Services:
	Windcat Workboats Ltd.	25%				$	7,610	$	7,541

	Other	1.8	%	–	33.30%	1,341		1,600

	Inland River Services:
	Other	3	%	–	51.80%	954		2,612

	Shipping Services:
	Sea-Vista	49%				77,222		—

	Illinois Corn Processing	30%				18,413		10,894

	Other	5	%	–	18.90%	2,022		1,929

						$	107,562	$	24,576

	Windcat Workboats. Windcat Workboats Holdings Ltd. (“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 September 30, 2014, the net assets of Windcat Workboats were $30.4 million. During the nine months ended September 30, 2014, the net income of Windcat Workboats was $1.0 million, of which $0.2 million was attributable to noncontrolling interests. During the nine months ended September 30, 2013, the net loss of Windcat Workboats was $0.9 million, of which $0.2 million was attributable to noncontrolling interests.
	SEA-Vista. On May 2, 2014, the Company issued a 49% noncontrolling interest to a financial investor in certain of its subsidiaries (collectively "SEA-Vista") that own and operate 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 for $145.7 million, net of $3.2 million in issue costs. SEA-Vista also holds the Company's contracts for the construction of three 50,000 DWT (deadweight tonnage) product tankers with expected deliveries in May 2016, October 2016 and March 2017, as well as its Title XI bonds payable and reserve funds and certain other working capital. The Company has evaluated the noncontrolling interest's protective rights in SEA-Vista, its ownership interest, and the underlying terms and conditions that govern SEA-Vista's operations and determined that the Company controls SEA-Vista. As a result, the Company has consolidated the financial position, operating results and cash flows of SEA-Vista. As of September 30, 2014, the net assets of SEA-Vista were $157.6 million. From May 2, 2014 through September 30, 2014, the net income of SEA-Vista was $12.9 million, of which $6.3 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 September 30, 2014, the net assets of ICP were $67.7 million. During the nine months ended September 30, 2014, the net income of ICP was $29.0 million, of which $7.5 million was attributable to noncontrolling interests. During the nine months ended September 30, 2013, the net loss of ICP was $4.4 million, of which $1.6 million was attributable to noncontrolling interests.
	For the twelve months ending March 31, 2014, the noncontrolling member of ICP had invoked a plant shutdown election that is available to each LLC member under certain circumstances; however, under its member rights, the Company elected to keep the plant in operation. As a result, the earnings and losses of ICP were disproportionately allocated to its members during the plant shutdown election period. Effective April 1, 2014, the noncontrolling member of ICP withdrew its plant shutdown election.
	Inland River Services. During the nine months ended September 30, 2014, the Company acquired the noncontrolling interest in one of its Inland River Services partnerships for $3.1 million ($2.1 million in cash and $1.0 million through the distribution of an inland river towboat to the noncontrolling interest holder).

Earnings_Per_Common_Share_of_S

Earnings Per Common Share of SEACOR	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Common Share of SEACOR	'
	EARNINGS PER COMMON SHARE OF SEACOR
	Basic earnings 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 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 per common share of SEACOR were as follows (in thousands, except share data):


		Three Months Ended September 30,					Nine Months Ended September 30,
		Net Income Attributable to SEACOR		Average O/S Shares	Per Share		Net Income Attributable to SEACOR		Average O/S Shares	Per Share
	2014
	Basic Weighted Average Common Shares Outstanding	$	27,463	19,196,121	$	1.43	$	60,039	19,761,620	$	3.04

	Effect of Dilutive Share Awards:
	Options and Restricted Stock(1)	—		405,770			—		412,773

	Convertible Notes(2)	5,320		6,025,851			9,481		4,200,525

	Diluted Weighted Average Common Shares Outstanding	$	32,783	25,627,742	$	1.28	$	69,520	24,374,918	$	2.85

	2013
	Basic Weighted Average Common Shares Outstanding	$	30,291	19,964,695	$	1.52	$	28,574	19,843,778	$	1.44

	Effect of Dilutive Share Awards:
	Options and Restricted Stock(1)	—		436,364			—		354,671

	Convertible Notes(3)	3,086		4,200,525			—		—

	Diluted Weighted Average Common Shares Outstanding	$	33,377	24,601,584	$	1.36	$	28,574	20,198,449	$	1.41

	______________________

	-1	For the three months ended September 30, 2014 and 2013, diluted earnings per common share of SEACOR excluded 457,651 and 115,832 of certain share awards, respectively, as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2014 and 2013, diluted earnings per common share of SEACOR excluded 330,918 and 303,313 of certain share awards, respectively, as the effect of their inclusion in the computation would be anti-dilutive.

	-2	For the nine months ended September 30, 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 nine months ended September 30, 2013, 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.

Share_Based_Compensation

Share Based Compensation	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014 were as follows:


	Director stock awards granted	1,875

	Employee Stock Purchase Plan (“ESPP”) shares issued	30,622

	Restricted stock awards granted	147,645

	Restricted stock awards canceled	1,000

	Shares released from Deferred Compensation Plan	216

	Stock Option Activities:
	Outstanding as of December 31, 2013	1,481,280

	Granted	151,350

	Exercised	(92,332	)
	Outstanding as of September 30, 2014	1,540,298

	Shares available for future grants and ESPP purchases as of September 30, 2014	1,178,003

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	Accounting standards require public business enterprises to report information about each of their operating business segments that exceed certain quantitative thresholds or meet certain other reporting requirements. Operating business segments have been defined as components of an enterprise about which separate financial information is available and is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company’s 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, 2013.
	The following tables summarize the operating results, capital expenditures and assets of the Company's reportable segments.


		Offshore			Inland			Shipping			ICP			Other			Corporate			Total
		Marine			River			Services			$’000			$’000			and			$’000
		Services			Services			$’000									Eliminations
		$’000			$’000												$’000
	For the three months ended
	30-Sep-14
	Operating Revenues:
	External customers	135,143			59,297			51,659			53,813			39,024			—			338,936

	Intersegment	35			635			—			—			—			(670	)		—

		135,178			59,932			51,659			53,813			39,024			(670	)		338,936

	Costs and Expenses:
	Operating	90,736			43,947			29,068			44,461			30,099			(635	)		237,676

	Administrative and general	14,514			3,520			5,883			463			8,629			13,646			46,655

	Depreciation and amortization	16,269			7,841			6,730			1,055			649			1,060			33,604

		121,519			55,308			41,681			45,979			39,377			14,071			317,935

	Gains (Losses) on Asset Dispositions	3,219			26,429			(2	)		—			—			223			29,869

	Operating Income (Loss)	16,878			31,053			9,976			7,834			(353	)		(14,518	)		50,870

	Other Income (Expense):
	Derivative gains (losses), net	(33	)		—			—			(2,674	)		205			(36	)		(2,538	)

	Foreign currency losses, net	(1,870	)		(450	)		(27	)		—			(121	)		(591	)		(3,059	)

	Other, net	—			—			123			—			42			(54	)		111

	Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,529			(95	)		(2,188	)		—			726			—			972

	Segment Profit	17,504			30,508			7,884			5,160			499

	Other Income (Expense) not included in Segment Profit																			3,032

	Less Equity Earnings included in Segment Profit																			(972	)
	Income Before Taxes and Equity Earnings																			48,416




		Offshore			Inland			Shipping			ICP(1)(2)			Other			Corporate			Total
		Marine			River			Services			$’000			$’000			and			$’000
		Services			Services			$’000									Eliminations
		$’000			$’000												$’000
	For the nine months ended
	30-Sep-14
	Operating Revenues:
	External customers	402,314			171,508			157,635			185,267			60,453			—			977,177

	Intersegment	112			2,390			—			—			—			(2,502	)		—

		402,426			173,898			157,635			185,267			60,453			(2,502	)		977,177

Costs and Expenses:
Operating	278,534			128,668			84,083			148,164			51,499			(2,390	)		688,558

Administrative and general	43,100			11,692			17,200			1,568			15,189			30,669			119,418

Depreciation and amortization	49,021			22,775			21,599			3,055			816			2,950			100,216

	370,655			163,135			122,882			152,787			67,504			31,229			908,192

Gains (Losses) on Asset Dispositions	14,483			28,092			(43	)		—			(409	)		(3,281	)		38,842
and Impairments, Net
Operating Income (Loss)	46,254			38,855			34,710			32,480			(7,460	)		(37,012	)		107,827

Other Income (Expense):
Derivative gains (losses), net	(164	)		—			—			(3,475	)		972			(14	)		(2,681	)

Foreign currency losses, net	(441	)		(303	)		(36	)		—			(59	)		(699	)		(1,538	)

Other, net	14,739			(38	)		(3,652	)		493			(4,796	)		(77	)		6,669

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	7,414			(3,842	)		129			—			(1,020	)		—			2,681

Segment Profit (Loss)	67,802			34,672			31,151			29,498			(12,363	)

Other Income (Expense) not included in Segment Profit (Loss)																			(2,955	)
Less Equity Earnings included in Segment Profit (Loss)																			(2,681	)
Income Before Taxes and Equity Earnings																			107,322


Capital Expenditures	63,377			48,402			180,736			2,485			148			15,946			311,094


As of September 30, 2014
Property and Equipment:

Historical cost	1,124,701			501,594			455,765			47,155			7,133			30,161			2,166,509

Accumulated depreciation	(495,272	)		(159,003	)		(207,482	)		(14,423	)		(3,827	)		(9,986	)		(889,993	)
	629,429			342,591			248,283			32,732			3,306			20,175			1,276,516

Construction in progress	71,880			29,793			181,953			195			235			306			284,362

	701,309			372,384			430,236			32,927			3,541			20,481			1,560,878

Investments, at Equity, and Advances to 50% or Less Owned Companies	110,648			90,356			204,580			—			39,242			—			444,826

Inventories	4,755			2,389			1,173			10,076			2,503			—			20,896

Goodwill	13,367			2,718			1,852			—			44,967			—			62,904

Intangible Assets	2,350			6,797			434			—			24,725			—			34,306

Other current and long-term assets, excluding cash and near cash assets(3)	140,805			58,476			19,959			12,426			86,119			21,623			339,408

Segment Assets	973,234			533,120			658,234			55,429			201,097

Cash and near cash assets(3)																			827,852

Total Assets																			3,291,070

______________________

-1	Operating revenues includes $177.2 million of tangible product sales and operating expenses includes $139.9 million of costs of goods sold.

-2	Inventories includes raw materials of $1.8 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.


	Offshore			Inland			Shipping			ICP			Other			Corporate			Total
	Marine			River			Services			$’000			$’000			and			$’000
	Services			Services			$’000									Eliminations
	$’000			$’000												$’000
For the three months ended
September 30, 2013
Operating Revenues:
External customers	156,173			51,950			48,200			52,580			27,881			—			336,784

Intersegment	25			792			—			—			—			(817	)		—

	156,198			52,742			48,200			52,580			27,881			(817	)		336,784

Costs and Expenses:
Operating	95,113			38,473			28,215			52,390			26,141			(792	)		239,540

Administrative and general	14,132			3,431			5,133			428			1,429			6,910			31,463

Depreciation and amortization	16,470			6,869			7,841			1,489			92			742			33,503

	125,715			48,773			41,189			54,307			27,662			6,860			304,506

Gains on Asset Dispositions	15,343			783			3,104			—			—			—			19,230

Operating Income (Loss)	45,826			4,752			10,115			(1,727	)		219			(7,677	)		51,508

Other Income (Expense):
Derivative gains (losses), net	32			—			—			1,129			(380	)		(1,084	)		(303	)

Foreign currency gains (losses), net	1,937			(89	)		6			—			15			361			2,230

Other, net	—			—			540			—			(3	)		(60	)		477

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	1,527			80			(1,413	)		—			36			—			230

Segment Profit (Loss)	49,322			4,743			9,248			(598	)		(113	)

Other Income (Expense) not included in Segment Profit (Loss)																			(7,389	)
Less Equity Earnings included in Segment Profit (Loss)																			(230	)
Income Before Taxes and Equity Earnings																			46,523



	Offshore			Inland			Shipping			ICP(1)(2)			Other			Corporate			Total
	Marine			River			Services			$’000			$’000			and			$’000
	Services			Services			$’000									Eliminations
	$’000			$’000												$’000
For the nine months ended
30-Sep-13
Operating Revenues:
External customers	418,815			148,153			142,779			146,807			62,857			—			919,411

Intersegment	77			2,023			—			—			—			(2,100	)		—

	418,892			150,176			142,779			146,807			62,857			(2,100	)		919,411

Costs and Expenses:
Operating	282,725			110,055			84,383			145,837			59,589			(2,023	)		680,566

Administrative and general	43,194			11,376			16,434			1,566			4,408			24,848			101,826

Depreciation and amortization	49,217			21,031			23,545			4,467			287			2,287			100,834

	375,136			142,462			124,362			151,870			64,284			25,112			883,226

Gains on Asset Dispositions and Impairments, Net	25,577			5,776			149			—			1,907			141			33,550

Operating Income (Loss)	69,333			13,490			18,566			(5,063	)		480			(27,071	)		69,735

Other Income (Expense):
Derivative gains (losses), net	357			—			—			1,641			12			(5,245	)		(3,235	)

Foreign currency losses, net	(2,160	)		(7	)		(9	)		—			(321	)		(200	)		(2,697	)

Other, net	11			—			742			—			51			(129	)		675

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	10,534			(2,306	)		(3,321	)		—			2,164			—			7,071

Segment Profit (Loss)	78,075			11,177			15,978			(3,422	)		2,386

Other Income (Expense) not included in Segment Profit (Loss)																			(11,214	)
Less Equity Earnings included in Segment Profit (Loss)																			(7,071	)
Loss Before Taxes, Equity Earnings and Discontinued Operations																			53,264


Capital Expenditures	85,324			22,138			36,218			656			384			1,763			146,483


As of September 30, 2013
Property and Equipment:

Historical cost	1,160,334			473,349			495,877			43,812			3,992			30,951			2,208,315

Accumulated depreciation	(457,454	)		(140,747	)		(216,270	)		(10,081	)		(600	)		(10,452	)		(835,604	)
	702,880			332,602			279,607			33,731			3,392			20,499			1,372,711

Construction in progress	95,552			23,814			7,323			632			2,119			41			129,481

	798,432			356,416			286,930			34,363			5,511			20,540			1,502,192

Investments, at Equity, and Advances to 50% or Less Owned Companies	99,191			57,445			123,354			—			85,901			—			365,891

Inventories	6,187			2,277			1,794			12,856			2,328			—			25,442

Goodwill	13,367			2,759			1,852			—			—			—			17,978

Intangible Assets	4,116			8,049			1,002			29			387			—			13,583

Other current and long-term assets, excluding cash and near cash assets(3)	160,248			45,881			19,480			6,765			62,863			23,060			318,297

Segment Assets	1,081,541			472,827			434,412			54,013			156,990

Cash and near cash assets(3)																			608,341

Total Assets																			2,851,724

______________________

-1	Operating revenues includes $141.1 million of tangible product sales and operating expenses includes $140.1 million of costs of goods sold.

-2	Inventories includes raw materials of $2.7 million and work in process of $2.1 million.

-3	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.

Discontinued_Operations_Notes

Discontinued Operations (Notes)	9 Months Ended
	Sep. 30, 2014
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]	'
Disposal Groups, Including Discontinued Operations, Disclosure	'
	DISCONTINUED OPERATIONS
	Summarized selected operating results of the Company's discontinued operations for the nine months ended September 30, 2013 were as follows (in thousands):


	SES Business
	Other Expense (final working capital adjustments)	$	(1,537	)
	Income Tax Benefit	538

	Net Loss	$	(999	)

	SEI
	Other Expense (final working capital adjustments)	$	(143	)
	Income Tax Benefit	50

	Net Loss	$	(93	)

	Era Group
	Operating Revenues	$	22,892

	Costs and Expenses:
	Operating	14,076

	Administrative and general	2,653

	Depreciation and amortization	3,875

		20,604

	Gains on Asset Dispositions and Impairments, Net	548

	Operating Income	2,836

	Other Expense, Net	(1,316		)
	Income Tax Expense	(10,818		)
	Equity in Earnings of 50% or Less Owned Companies	65

	Net Loss	$	(9,233	)

Basis_of_Presentation_and_Acco1

Basis of Presentation and Accounting Policy (Policy)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis Of Consolidation	'
	The condensed consolidated financial information for the three and nine months ended September 30, 2014 and 2013 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 September 30, 2014, its results of operations for the three and nine months ended September 30, 2014 and 2013, its comprehensive income for the three and nine months ended September 30, 2014 and 2013, its changes in equity for the nine months ended September 30, 2014, and its cash flows for the nine months ended September 30, 2014 and 2013. 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, 2013.
	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, 2013.
Discontinued Operations, Policy	'
	Discontinued Operations (see Note 15). The Company reports disposed businesses as discontinued operations when it has no continuing interest in the business. Discontinued operations includes the historical financial position, results of operations and cash flows of the operations previously reported as discontinued in the Company's Annual Report on Form 10-K for the year ended December 31, 2013.
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. Deferred revenues, included in other current liabilities, for the nine months ended September 30 were as follows (in thousands):


		2014				2013
	Balance at beginning of period	$	6,592			$	6,592

	Revenues deferred during the period	202				—

	Balance at end of period	$	6,794			$	6,592

	As of September 30, 2014 and 2013, the Company's deferred revenues 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 as approved by the bankruptcy court. All costs and expenses related to these charters were recognized as incurred.
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				Derivative			Other			Total			Foreign			Other			Other
			Currency				Gains (Losses) on									Currency						Comprehensive
			Translation				Cash Flow									Translation						Loss
			Adjustments				Hedges, net									Adjustments
	31-Dec-13		$	(927	)		$	(257	)	$	(8	)	$	(1,192	)	$	395		$	(5	)

	Other comprehensive income (loss)		(1,558		)		483			—			(1,075		)	(183		)	—			$	(1,258	)

	Income tax (expense) benefit		545				(169		)	—			376			—			—			376

	Nine months ended September 30, 2014		$	(1,940	)		$	57		$	(8	)	$	(1,891	)	$	212		$	(5	)	$	(882	)

New Accounting Pronouncements	'
	New Accounting Pronouncement. On May 28, 2014, the Financial Accounting Standards Board 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, 2016 and early adoption is prohibited. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows.
Reclassifications	'
	Reclassifications. Certain reclassifications of prior period information have been made to conform to the presentation of the current period information. These reclassifications had no effect on net income as previously reported.

Basis_of_Presentation_and_Acco2

Basis of Presentation and Accounting Policy Deferred Revenue (Tables)	9 Months Ended
	Sep. 30, 2014
Deferred Revenue [Abstract]	'
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]	'
	Deferred revenues, included in other current liabilities, for the nine months ended September 30 were as follows (in thousands):


		2014		2013
	Balance at beginning of period	$	6,592	$	6,592

	Revenues deferred during the period	202		—

	Balance at end of period	$	6,794	$	6,592

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	The Company’s financial assets and liabilities as of September 30, 2014 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)	$	43,286		$	—		$	—

	Derivative instruments (included in other receivables)	1,419			5,958			—

	Construction reserve funds and Title XI reserve funds	321,278			—			—

	LIABILITIES
	Short sale of marketable securities (included in other current liabilities)	10,351			—			—

	Derivative instruments (included in other current liabilities)	3,268			864			—

	______________________

	-1	Marketable security gains (losses), net include unrealized gains of $9.7 million and unrealized losses of $1.2 million for the three months ended September 30, 2014 and 2013, respectively, related to marketable security positions held by the Company as of September 30, 2014. Marketable security gains (losses), net include unrealized gains of $15.3 million and $9.4 million for the nine months ended September 30, 2014 and 2013, respectively, related to marketable security positions held by the Company as of September 30, 2014.
Estimated Fair Value Of Other Financial Assets And Liabilities	'
	The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2014 were as follows (in thousands):


					Estimated Fair Value
		Carrying			Level 1			Level 2			Level 3
		Amount
	ASSETS
	Cash, cash equivalents and restricted cash	$	463,288		$	463,288		$	—		$	—

	Investments, at cost, in 50% or less owned companies (included in other	13,728			see below
	assets)
	Notes receivable from third parties (included in other receivables and other assets)	22,592			see below

	LIABILITIES
	Long-term debt, including current portion(1)	881,948			—			1,015,744			—

	______________________

	-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 nine months ended September 30, 2014 were as follows (in thousands):


			Level 1			Level 2			Level 3
	ASSETS
	Long-lived assets held for sale(1)		$	—		$	11,700		$	—

	Investment in Witt O'Brien's LLC(2)		—			50,569			—

	______________________

	-1	During the nine months ended September 30, 2014, the Company recognized impairment charges of $3.9 million related to two aircraft following the adjustment of their carrying value to fair value based on the expected sales price of each.

	-2	During the nine months ended September 30, 2014, the Company marked its equity investment in Witt O'Brien's LLC ("Witt O'Brien's") to fair value following its acquisition of a controlling interest (See Note 4). The investment's fair value was based on the Company's purchase price of the acquired interest.

Derivative_Instruments_And_Hed1

Derivative Instruments And Hedging Strategies (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative [Line Items]	'
Fair Values Of Derivative Instruments	'
	The fair values of the Company’s derivative instruments as of September 30, 2014 were as follows (in thousands):


		Derivative			Derivative
		Asset			Liability

	Forward currency exchange, option and future contracts	$	—		$	60

	Interest rate swap agreements	—			744

	Commodity swap, option and future contracts:
	Exchange traded	1,418			3,268

	Non-exchange traded	5,959			60

		$	7,377		$	4,132

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 nine months ended September 30 as follows (in thousands):


		2014			2013
	Options on equities and equity indices	$	22		$	(4,132	)

	Forward currency exchange, option and future contracts	62			(439		)

	Interest rate swap agreements	(169		)	253

	Commodity swap, option and future contracts:
	Exchange traded	(2,996		)	368

	Non-exchange traded	400			715

		$	(2,681	)	$	(3,235	)

Equipment_Acquisitions_Disposi1

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Tables)	9 Months Ended
	Sep. 30, 2014
Equipment Acquisitions, Dispositions And Depreciation And Impairment Policies [Abstract]	'
Schedule Of Deferred Gain Activity	'
	Deferred gain activity related to these transactions for the nine months ended September 30 was as follows (in thousands):


		2014			2013
	Balance at beginning of period	$	124,763		$	111,514
	Balance at beginning of period	$	124,763		$	111,514
	Adjustments to deferred gains arising from asset sales	53,832			14,609
	Adjustments to deferred gains arising from asset sales	53,832			14,609
	Amortization of deferred gains included in operating expenses as a reduction to rental expense	(12,196		)	(7,707		)
	Amortization of deferred gains included in gains on asset dispositions and impairments, net	(3,484		)	(2,146		)
	Balance at end of period	$	162,915		$	116,270
	Balance at end of period	$	162,915		$	116,270
Schedule of Estimated Useful Life of Newly Acquired Equipment	'
	As of September 30, 2014, 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 and deck barges	20
	Inland river liquid tank barges	25
	Inland river towboats	25
	U.S.-flag product tankers	25
	Short-sea Container/RORO(1) vessels	20
	Harbor tugs	25
	Ocean liquid tank barges	25
	Terminal and manufacturing facilities	20
	______________________

	-1	Roll on/Roll off ("RORO").

Noncontrolling_Interests_in_Su1

Noncontrolling Interests in Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2014
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				September 30, 2014		December 31, 2013
	Offshore Marine Services:
	Windcat Workboats Ltd.	25%				$	7,610	$	7,541

	Other	1.8	%	–	33.30%	1,341		1,600

	Inland River Services:
	Other	3	%	–	51.80%	954		2,612

	Shipping Services:
	Sea-Vista	49%				77,222		—

	Illinois Corn Processing	30%				18,413		10,894

	Other	5	%	–	18.90%	2,022		1,929

						$	107,562	$	24,576

Earnings_Per_Common_Share_of_S1

Earnings Per Common Share of SEACOR (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Weighted Average Number of Shares	'
	Computations of basic and diluted earnings per common share of SEACOR were as follows (in thousands, except share data):


		Three Months Ended September 30,					Nine Months Ended September 30,
		Net Income Attributable to SEACOR		Average O/S Shares	Per Share		Net Income Attributable to SEACOR		Average O/S Shares	Per Share
	2014
	Basic Weighted Average Common Shares Outstanding	$	27,463	19,196,121	$	1.43	$	60,039	19,761,620	$	3.04

	Effect of Dilutive Share Awards:
	Options and Restricted Stock(1)	—		405,770			—		412,773

	Convertible Notes(2)	5,320		6,025,851			9,481		4,200,525

	Diluted Weighted Average Common Shares Outstanding	$	32,783	25,627,742	$	1.28	$	69,520	24,374,918	$	2.85

	2013
	Basic Weighted Average Common Shares Outstanding	$	30,291	19,964,695	$	1.52	$	28,574	19,843,778	$	1.44

	Effect of Dilutive Share Awards:
	Options and Restricted Stock(1)	—		436,364			—		354,671

	Convertible Notes(3)	3,086		4,200,525			—		—

	Diluted Weighted Average Common Shares Outstanding	$	33,377	24,601,584	$	1.36	$	28,574	20,198,449	$	1.41

	______________________

	-1	For the three months ended September 30, 2014 and 2013, diluted earnings per common share of SEACOR excluded 457,651 and 115,832 of certain share awards, respectively, as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2014 and 2013, diluted earnings per common share of SEACOR excluded 330,918 and 303,313 of certain share awards, respectively, as the effect of their inclusion in the computation would be anti-dilutive.

	-2	For the nine months ended September 30, 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 nine months ended September 30, 2013, 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.

Share_Based_Compensation_Table

Share Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014 were as follows:


	Director stock awards granted	1,875

	Employee Stock Purchase Plan (“ESPP”) shares issued	30,622

	Restricted stock awards granted	147,645

	Restricted stock awards canceled	1,000

	Shares released from Deferred Compensation Plan	216

	Stock Option Activities:
	Outstanding as of December 31, 2013	1,481,280

	Granted	151,350

	Exercised	(92,332	)
	Outstanding as of September 30, 2014	1,540,298

	Shares available for future grants and ESPP purchases as of September 30, 2014	1,178,003

Segment_Information_Segment_In

Segment Information Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
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			Inland			Shipping			ICP			Other			Corporate			Total
		Marine			River			Services			$’000			$’000			and			$’000
		Services			Services			$’000									Eliminations
		$’000			$’000												$’000
	For the three months ended
	30-Sep-14
	Operating Revenues:
	External customers	135,143			59,297			51,659			53,813			39,024			—			338,936

	Intersegment	35			635			—			—			—			(670	)		—

		135,178			59,932			51,659			53,813			39,024			(670	)		338,936

	Costs and Expenses:
	Operating	90,736			43,947			29,068			44,461			30,099			(635	)		237,676

	Administrative and general	14,514			3,520			5,883			463			8,629			13,646			46,655

	Depreciation and amortization	16,269			7,841			6,730			1,055			649			1,060			33,604

		121,519			55,308			41,681			45,979			39,377			14,071			317,935

	Gains (Losses) on Asset Dispositions	3,219			26,429			(2	)		—			—			223			29,869

	Operating Income (Loss)	16,878			31,053			9,976			7,834			(353	)		(14,518	)		50,870

	Other Income (Expense):
	Derivative gains (losses), net	(33	)		—			—			(2,674	)		205			(36	)		(2,538	)

	Foreign currency losses, net	(1,870	)		(450	)		(27	)		—			(121	)		(591	)		(3,059	)

	Other, net	—			—			123			—			42			(54	)		111

	Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,529			(95	)		(2,188	)		—			726			—			972

	Segment Profit	17,504			30,508			7,884			5,160			499

	Other Income (Expense) not included in Segment Profit																			3,032

	Less Equity Earnings included in Segment Profit																			(972	)
	Income Before Taxes and Equity Earnings																			48,416




		Offshore			Inland			Shipping			ICP(1)(2)			Other			Corporate			Total
		Marine			River			Services			$’000			$’000			and			$’000
		Services			Services			$’000									Eliminations
		$’000			$’000												$’000
	For the nine months ended
	30-Sep-14
	Operating Revenues:
	External customers	402,314			171,508			157,635			185,267			60,453			—			977,177

	Intersegment	112			2,390			—			—			—			(2,502	)		—

		402,426			173,898			157,635			185,267			60,453			(2,502	)		977,177

	Costs and Expenses:
	Operating	278,534			128,668			84,083			148,164			51,499			(2,390	)		688,558

Administrative and general	43,100			11,692			17,200			1,568			15,189			30,669			119,418

Depreciation and amortization	49,021			22,775			21,599			3,055			816			2,950			100,216

	370,655			163,135			122,882			152,787			67,504			31,229			908,192

Gains (Losses) on Asset Dispositions	14,483			28,092			(43	)		—			(409	)		(3,281	)		38,842
and Impairments, Net
Operating Income (Loss)	46,254			38,855			34,710			32,480			(7,460	)		(37,012	)		107,827

Other Income (Expense):
Derivative gains (losses), net	(164	)		—			—			(3,475	)		972			(14	)		(2,681	)

Foreign currency losses, net	(441	)		(303	)		(36	)		—			(59	)		(699	)		(1,538	)

Other, net	14,739			(38	)		(3,652	)		493			(4,796	)		(77	)		6,669

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	7,414			(3,842	)		129			—			(1,020	)		—			2,681

Segment Profit (Loss)	67,802			34,672			31,151			29,498			(12,363	)

Other Income (Expense) not included in Segment Profit (Loss)																			(2,955	)
Less Equity Earnings included in Segment Profit (Loss)																			(2,681	)
Income Before Taxes and Equity Earnings																			107,322


Capital Expenditures	63,377			48,402			180,736			2,485			148			15,946			311,094


As of September 30, 2014
Property and Equipment:

Historical cost	1,124,701			501,594			455,765			47,155			7,133			30,161			2,166,509

Accumulated depreciation	(495,272	)		(159,003	)		(207,482	)		(14,423	)		(3,827	)		(9,986	)		(889,993	)
	629,429			342,591			248,283			32,732			3,306			20,175			1,276,516

Construction in progress	71,880			29,793			181,953			195			235			306			284,362

	701,309			372,384			430,236			32,927			3,541			20,481			1,560,878

Investments, at Equity, and Advances to 50% or Less Owned Companies	110,648			90,356			204,580			—			39,242			—			444,826

Inventories	4,755			2,389			1,173			10,076			2,503			—			20,896

Goodwill	13,367			2,718			1,852			—			44,967			—			62,904

Intangible Assets	2,350			6,797			434			—			24,725			—			34,306

Other current and long-term assets, excluding cash and near cash assets(3)	140,805			58,476			19,959			12,426			86,119			21,623			339,408

Segment Assets	973,234			533,120			658,234			55,429			201,097

Cash and near cash assets(3)																			827,852

Total Assets																			3,291,070

______________________

-1	Operating revenues includes $177.2 million of tangible product sales and operating expenses includes $139.9 million of costs of goods sold.

-2	Inventories includes raw materials of $1.8 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.


	Offshore			Inland			Shipping			ICP			Other			Corporate			Total
	Marine			River			Services			$’000			$’000			and			$’000
	Services			Services			$’000									Eliminations
	$’000			$’000												$’000
For the three months ended
September 30, 2013
Operating Revenues:
External customers	156,173			51,950			48,200			52,580			27,881			—			336,784

Intersegment	25			792			—			—			—			(817	)		—

	156,198			52,742			48,200			52,580			27,881			(817	)		336,784

Costs and Expenses:
Operating	95,113			38,473			28,215			52,390			26,141			(792	)		239,540

Administrative and general	14,132			3,431			5,133			428			1,429			6,910			31,463

Depreciation and amortization	16,470			6,869			7,841			1,489			92			742			33,503

	125,715			48,773			41,189			54,307			27,662			6,860			304,506

Gains on Asset Dispositions	15,343			783			3,104			—			—			—			19,230

Operating Income (Loss)	45,826			4,752			10,115			(1,727	)		219			(7,677	)		51,508

Other Income (Expense):
Derivative gains (losses), net	32			—			—			1,129			(380	)		(1,084	)		(303	)

Foreign currency gains (losses), net	1,937			(89	)		6			—			15			361			2,230

Other, net	—			—			540			—			(3	)		(60	)		477

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	1,527			80			(1,413	)		—			36			—			230

Segment Profit (Loss)	49,322			4,743			9,248			(598	)		(113	)

Other Income (Expense) not included in Segment Profit (Loss)																			(7,389	)
Less Equity Earnings included in Segment Profit (Loss)																			(230	)
Income Before Taxes and Equity Earnings																			46,523



	Offshore			Inland			Shipping			ICP(1)(2)			Other			Corporate			Total
	Marine			River			Services			$’000			$’000			and			$’000
	Services			Services			$’000									Eliminations
	$’000			$’000												$’000
For the nine months ended
30-Sep-13
Operating Revenues:
External customers	418,815			148,153			142,779			146,807			62,857			—			919,411

Intersegment	77			2,023			—			—			—			(2,100	)		—

	418,892			150,176			142,779			146,807			62,857			(2,100	)		919,411

Costs and Expenses:
Operating	282,725			110,055			84,383			145,837			59,589			(2,023	)		680,566

Administrative and general	43,194			11,376			16,434			1,566			4,408			24,848			101,826

Depreciation and amortization	49,217			21,031			23,545			4,467			287			2,287			100,834

	375,136			142,462			124,362			151,870			64,284			25,112			883,226

Gains on Asset Dispositions and Impairments, Net	25,577			5,776			149			—			1,907			141			33,550

Operating Income (Loss)	69,333			13,490			18,566			(5,063	)		480			(27,071	)		69,735

Other Income (Expense):
Derivative gains (losses), net	357			—			—			1,641			12			(5,245	)		(3,235	)

Foreign currency losses, net	(2,160	)		(7	)		(9	)		—			(321	)		(200	)		(2,697	)

Other, net	11			—			742			—			51			(129	)		675

Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	10,534			(2,306	)		(3,321	)		—			2,164			—			7,071

Segment Profit (Loss)	78,075			11,177			15,978			(3,422	)		2,386

Other Income (Expense) not included in Segment Profit (Loss)																			(11,214	)
Less Equity Earnings included in Segment Profit (Loss)																			(7,071	)
Loss Before Taxes, Equity Earnings and Discontinued Operations																			53,264


Capital Expenditures	85,324			22,138			36,218			656			384			1,763			146,483


As of September 30, 2013
Property and Equipment:

Historical cost	1,160,334			473,349			495,877			43,812			3,992			30,951			2,208,315

Accumulated depreciation	(457,454	)		(140,747	)		(216,270	)		(10,081	)		(600	)		(10,452	)		(835,604	)
	702,880			332,602			279,607			33,731			3,392			20,499			1,372,711

Construction in progress	95,552			23,814			7,323			632			2,119			41			129,481

	798,432			356,416			286,930			34,363			5,511			20,540			1,502,192

Investments, at Equity, and Advances to 50% or Less Owned Companies	99,191			57,445			123,354			—			85,901			—			365,891

Inventories	6,187			2,277			1,794			12,856			2,328			—			25,442

Goodwill	13,367			2,759			1,852			—			—			—			17,978

Intangible Assets	4,116			8,049			1,002			29			387			—			13,583

Other current and long-term assets, excluding cash and near cash assets(3)	160,248			45,881			19,480			6,765			62,863			23,060			318,297

Segment Assets	1,081,541			472,827			434,412			54,013			156,990

Cash and near cash assets(3)																			608,341

Total Assets																			2,851,724

______________________

-1	Operating revenues includes $141.1 million of tangible product sales and operating expenses includes $140.1 million of costs of goods sold.

-2	Inventories includes raw materials of $2.7 million and work in process of $2.1 million.

-3	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.

Discontinued_Operations_Disclo

Discontinued Operations Disclosure Group, Including Discontinued Operation, Income Statement Disclosures (Tables)	9 Months Ended
	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Summarized selected operating results of the Company's discontinued operations for the nine months ended September 30, 2013 were as follows (in thousands):


	SES Business
	Other Expense (final working capital adjustments)	$	(1,537	)
	Income Tax Benefit	538

	Net Loss	$	(999	)

	SEI
	Other Expense (final working capital adjustments)	$	(143	)
	Income Tax Benefit	50

	Net Loss	$	(93	)

	Era Group
	Operating Revenues	$	22,892

	Costs and Expenses:
	Operating	14,076

	Administrative and general	2,653

	Depreciation and amortization	3,875

		20,604

	Gains on Asset Dispositions and Impairments, Net	548

	Operating Income	2,836

	Other Expense, Net	(1,316		)
	Income Tax Expense	(10,818		)
	Equity in Earnings of 50% or Less Owned Companies	65

	Net Loss	$	(9,233	)

Basis_of_Presentation_and_Acco3

Basis of Presentation and Accounting Policy Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	($1,940)	'	($1,940)	'	($927)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	57	'	57	'	-257
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-8	'	-8	'	-8
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent	'	'	-1,558	'	'
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent	'	'	483	'	'
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	'	'	-1,075	'	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	'	'	-183	'	'
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	-3,677	4,177	-1,258	337	'
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent	'	'	545	'	'
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent	'	'	-169	'	'
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	'	'	376	'	'
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	-1,139	1,311	-376	125	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-1,891	'	-1,891	'	-1,192
Other Comprehensive Income (Loss), Net of Tax	-2,538	2,866	-882	212	'
Non-Controlling Interests In Subsidiaries [Member]	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	212	'	212	'	395
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-5	'	-5	'	-5
Other Comprehensive Income (Loss), Net of Tax	'	'	$183	'	'

Basis_of_Presentation_and_Acco4

Basis of Presentation and Accounting Policy Deferred Revenue (Details) (Offshore Marine Services [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Offshore Marine Services [Member]	'	'	'	'
Deferred Revenue	$6,794	$6,592	$6,592	$6,592
Deferred Revenue, Additions	$202	$0	'	'

Fair_Value_Measurements_Financ

Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Construction Reserve Funds & Title XI Reserve Funds	$321,278,000	'	$321,278,000	'	$261,739,000
Marketable security gains (losses), net include losses	9,700,000	-1,200,000	15,300,000	9,400,000	'
Fair Value, Inputs, Level 1 [Member]	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Marketable securities	43,286,000	'	43,286,000	'	'
Derivative instruments (included in other receivables)	1,419,000	'	1,419,000	'	'
Construction Reserve Funds & Title XI Reserve Funds	321,278,000	'	321,278,000	'	'
Short sales of marketable securities	10,351,000	'	10,351,000	'	'
Derivative instruments (included in other current liabilities)	3,268,000	'	3,268,000	'	'
Fair Value, Inputs, Level 2 [Member]	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Marketable securities	0	'	0	'	'
Derivative instruments (included in other receivables)	5,958,000	'	5,958,000	'	'
Construction Reserve Funds & Title XI Reserve Funds	0	'	0	'	'
Short sales of marketable securities	0	'	0	'	'
Derivative instruments (included in other current liabilities)	864,000	'	864,000	'	'
Fair Value, Inputs, Level 3 [Member]	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Marketable securities	0	'	0	'	'
Derivative instruments (included in other receivables)	0	'	0	'	'
Construction Reserve Funds & Title XI Reserve Funds	0	'	0	'	'
Short sales of marketable securities	0	'	0	'	'
Derivative instruments (included in other current liabilities)	$0	'	$0	'	'

Fair_Value_Measurements_Estima

Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash, cash equivalents and restricted cash, Carrying Amount	463,288	'
Investments, at cost, in 50% or less owned companies (included in other assets), Carrying Amount	13,728	'
Notes receivable from other business ventures (included in other receivables and other assets)	22,592	'
Long-term debt, including current portion, Carrying Amount	881,948	'
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	463,288	'
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	1,015,744	'
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%	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%	3.00%

Fair_Value_Measurements_NonFin

Fair Value Measurements (Non-Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $)	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
	Fair Value, Inputs, Level 1 [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 3 [Member]	Aircraft [Domain]	Witt O'Brien's LLC [Member]	Witt O'Brien's LLC [Member]	Witt O'Brien's LLC [Member]
					Fair Value, Inputs, Level 1 [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'	'
Assets Held-for-sale, Long Lived	$0	$11,700,000	$0	'	'	'	'
Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure	'	'	'	'	0	50,569,000	0
Asset Impairment Charges	'	'	'	$3,900,000	'	'	'

Derivative_Instruments_And_Hed2

Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details) (Not Designated as Hedging Instrument [Member], USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified	Sep. 30, 2014
Derivative [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	$7,377
Derivative Liability	4,132
Foreign Exchange [Member]	'
Derivative [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	60
Interest Rate Swap Agreements [Member]	'
Derivative [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	744
Commodity Contract [Member]	'
Derivative [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	1,418
Derivative Liability	3,268
Commodity Swap, Option And Future Contracts, Non-Exchange Traded [Member]	'
Derivative [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	5,959
Derivative Liability	$60

Derivative_Instruments_And_Hed3

Derivative Instruments And Hedging Strategies (Narrative) (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2014
In Millions, unless otherwise specified	SCFCo Holdings [Member]	Seajon [Member]	Not Designated as Hedging Instrument [Member]	Not Designated as Hedging Instrument [Member]	Subsequent Event [Member]	Subsequent Event [Member]
	Cash Flow Hedging [Member]	Cash Flow Hedging [Member]	Interest Rate Swap Agreements [Member]	Sea Cat Crewzer [Member]	Sea Cat Crewzer [Member]	Sea-Cat Crewzer II [Member]
				Interest Rate Swap Agreements [Member]	Cash Flow Hedging [Member]	Cash Flow Hedging [Member]
Derivative [Line Items]	'	'	'	'	'	'
Fixed interest rate	'	2.79%	'	1.48%	1.52%	1.52%
Fixed interest rate range, minimum	1.53%	'	3.00%	'	'	'
Fixed interest rate range, maximum	1.62%	'	3.05%	'	'	'
Derivative, Notional Amount	$16.90	$35.60	$32.30	$15.70	$24.80	$28

Derivative_Instruments_And_Hed4

Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments) (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Derivative [Line Items]	'	'
Derivative gains (losses), net	($2,681,000)	($3,235,000)
Options On Equities And Equity Indices [Member]	'	'
Derivative [Line Items]	'	'
Derivative gains (losses), net	22,000	-4,132,000
Forward Currency Exchange, Option And Future Contracts [Member]	'	'
Derivative [Line Items]	'	'
Derivative gains (losses), net	62,000	-439,000
Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative gains (losses), net	-169,000	253,000
Commodity Contract [Member]	'	'
Derivative [Line Items]	'	'
Derivative gains (losses), net	-2,996,000	368,000
Commodity Swap, Option And Future Contracts, Non-Exchange Traded [Member]	'	'
Derivative [Line Items]	'	'
Derivative gains (losses), net	400,000	715,000
Not Designated as Hedging Instrument [Member] \| Forward Currency Exchange, Option And Future Contracts [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	3,500,000	'
Not Designated as Hedging Instrument [Member] \| Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Lower Fixed Interest Rate Range	3.00%	'
Derivative, Higher Fixed Interest Rate Range	3.05%	'
Derivative, Notional Amount	32,300,000	'
Not Designated as Hedging Instrument [Member] \| Dynamic Offshore Drilling Ltd [Member] \| Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fixed Interest Rate	1.30%	'
Derivative, Notional Amount	95,800,000	'
Not Designated as Hedging Instrument [Member] \| OSV Partners [Member] \| Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Lower Fixed Interest Rate Range	1.89%	'
Derivative, Higher Fixed Interest Rate Range	2.27%	'
Derivative, Notional Amount	32,600,000	'
Not Designated as Hedging Instrument [Member] \| Sea Cat Crewzer [Member] \| Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fixed Interest Rate	1.48%	'
Derivative, Notional Amount	15,700,000	'
Not Designated as Hedging Instrument [Member] \| Dorian LPG [Member] \| Interest Rate Swap Agreements [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Lower Fixed Interest Rate Range	2.96%	'
Derivative, Higher Fixed Interest Rate Range	5.40%	'
Derivative, Notional Amount	$122,600,000	'

Business_Acquisitions_Narrativ

Business Acquisitions (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jun. 06, 2013	Jun. 06, 2013	Sep. 30, 2014	Sep. 30, 2014	Jul. 11, 2014
		C Lift L L C [Member]	C Lift L L C [Member]	C Lift L L C [Member]	Witt O'Brien's LLC [Member]	Witt O'Brien's LLC [Member]	Witt O'Brien's LLC [Member]
				Liftboats [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$31,079,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	1,925,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	519,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investments, at Equity, and Advances to 50% or Less Owned Companies	-49,968,000	'	'	'	'	'	'
Goodwill, Gross	44,967,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	24,901,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	111,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	-1,709,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	-12,274,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	-3,266,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	91,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	-1,376,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	35,000,000	'	'	'	'	'	'
Cash Acquired from Acquisition	400,000	'	'	'	'	'	'
Business Acquisition, Percentage of Voting Interests Acquired	'	'	50.00%	'	'	'	45.80%
Payments to Acquire Businesses, Gross	'	$13,300,000	'	'	$35,400,000	$35,400,000	'
Number Of Equipments Acquired	'	'	'	2	'	'	'

Equipment_Acquisitions_Disposi2

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Deferred Gain Activity) (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Equipment Acquisitions, Dispositions And Depreciation And Impairment Policies [Abstract]	'	'
Repayments of Lines of Credit	($9,400,000)	'
Deferred Gain on Sale of Property, Beginning of Period	124,763,000	111,514,000
Deferred Gains on Asset Sales	53,832,000	14,609,000
Amortization Of Deferred Gains Included in Operating Expenses As A Reduction To Rental Expense	-12,196,000	-7,707,000
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net	-3,484,000	-2,146,000
Deferred Gain on Sale of Property, End of Period	$162,915,000	$116,270,000

Equipment_Acquisitions_Disposi3

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Useful Life) (Details)	9 Months Ended
	Sep. 30, 2014
Offshore Support Vessels [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'20 years
Wind Farm Utility Vessel [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'10 years
Inland River Dry Cargo And Deck Barges [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'20 years
Inland River Liquid Tank Barges [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'25 years
Inland River Towboats [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'25 years
U.S.-flag Product Tankers [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'25 years
R O R O Vessels [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'20 years	[1]
Harbor Tugs [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'25 years
Ocean Liquid Tank Barge [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'25 years
Terminal And Manufacturing Facilities [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life (in years)	'20 years

[1]	Roll on/Roll off ("RORO").

Equipment_Acquisitions_Disposi4

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Narrative) (Details) (USD $)

9 Months Ended

12 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

U.S.-flag Product Tankers [Member]

Offshore Support Vessels Crew [Member]

Offshore Support Vessels Supply [Member]

Liftboats [Member]

Wind Farm Utility Vessel [Member]

Inland River Dry Cargo Barges [Member]

Inland River Towboat [Member]

R O R O Vessels [Member]

Aircraft [Domain]

Gains on Asset Dispositions and Impariments, Net [Member]

equipment

Property, Plant and Equipment [Line Items]

Payments to Acquire Property, Plant, and Equipment

$311,094,000

$146,483,000

$151,000,000

Unrecorded Unconditional Purchase Obligation, Maximum Quantity

Number Of Equipments Delivered

Number Of Equipments Sold

Sales Price Of Equipment

207,700,000

Proceeds from Sale of Property, Plant and Equipment, Excluding Deposits on Future Equipment Sales

182,100,000

Proceeds from Issuance of Secured Debt

25,600,000

Proceeds from disposition of property and equipment

5,800,000

Gain (Loss) on Disposition of Property Plant Equipment

93,000,000

Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property

39,200,000

Deferred Gains on Asset Sales

53,832,000

14,609,000

Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net

-3,484,000

-2,146,000

3,500,000

Asset Impairment Charges

$3,900,000

Investments_At_Equity_And_Adva1

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) (USD $)

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Jul. 11, 2014

Sep. 30, 2014

In Millions, unless otherwise specified

Mexmar [Member]

Sea-Cat Crewzer II [Member]

Sea Cat Crewzer [Member]

OSV Partners [Member]

SCFCo Holdings [Member]

Seajon [Member]

Avion Pacific Limited [Member]

Witt O'Brien's LLC [Member]

Cleancor [Member]

Other Inland River Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Witt O'Brien's LLC [Member]

Offshore Support Vessels [Member]

Inland River Dry Cargo Barges [Member]

Inland River Towboats [Member]

Mexmar [Member]

OSV Partners [Member]

equipment

SCFCo Holdings [Member]

Schedule Of Equity Method Investments [Line Items]

Number Of Equipments Delivered

Payments to Acquire Property, Plant, and Equipment

$32

Payments to Acquire Machinery and Equipment

6.4

27.7

41.4

Secured Debt

25.6

Secured Debt, Repayments

6.7

Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital

3.2

0.4

2.1

0.2

Partners' Capital Account, Contributions

3.5

16.2

2.3

4.8

1.2

0.2

Payments for Advance to Affiliate

23.1

0.7

1.5

Outstanding Working Capital Advances At End Of Period

27.9

Proceeds from Collection of Advance to Affiliate

Repayment of Notes Receivable from Related Parties

Business Acquisition, Percentage of Voting Interests Acquired

45.80%

Payments to Acquire Businesses, Gross

35.4

Guarantor Obligations, Maximum Exposure, Undiscounted

109.1

Allocable Share of Uncalled Capital

$2.30

Commitments_And_Contingencies_

Commitments And Contingencies (Narrative) (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2010

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2010

Sep. 30, 2014

Wunstell Action [Member]

Master Complaints [Member]

Multi-district Litigation [Member]

Darnell Alexander [Member]

Abney Litigation [Member]

Abood Litigation [Member]

HEPACO Litigation [Member]

Prejean [Member]

Offshore Support Vessels [Member]

Inland River Liquid Tank Barges [Member]

Inland River Towboats [Member]

U.S.-flag Product Tankers [Member]

U.S. Flag Articulated Tug-Barge [Member]

Other Machinery and Equipment [Member]

Offshore Marine Services [Member]

plaintiff

claim

equipment

Loss Contingencies [Line Items]

Total unfunded capital commitments

$520,500,000

$201,600,000

$1,300,000

$3,300,000

$230,200,000

$71,300,000

$12,800,000

Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year

48,000,000

Unrecorded Unconditional Purchase Obligation, Due within Two Years

426,000,000

Unrecorded Unconditional Purchase Obligation, Due within Three Years

46,500,000

Unrecorded Unconditional Purchase Obligation, Maximum Quantity

Claims Filed

410

117

668

174

330

Loss Contingency, Damages Sought, Value

20,291,178.92

Other Nonoperating Gains (Losses)

$14,700,000

Multiemployer_Pension_Plans_De

Multiemployer Pension Plans (Details) (American Maritime Officers Pension Plan [Member], USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	Sep. 30, 2013
American Maritime Officers Pension Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Pension and other postretirement benefit plans, withdrawal liability	$46.50

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)	9 Months Ended
Long-Term Debt (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Debt Instrument [Line Items]	'	'
Letters of Credit Outstanding, Amount	$18,200,000	'
Repayments of long-term debt	9,600,000	'
Net borrowings (repayments) on inventory financing arrangements	-3,116,000	4,183,000
Proceeds from Lines of Credit	11,500,000	'
Repayments of Lines of Credit	($9,400,000)	'
Seven Point Three Seven Five Percentage Senior Notes Due Two Thousand Nineteen Member	'	'
Debt Instrument [Line Items]	'	'
Debt Instrument, Interest Rate, Stated Percentage	7.38%	'

Stock_Repurchases_Details

Stock Repurchases (Details) (USD $)	9 Months Ended			3 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Jul. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
	Sep. 30, 2014	Jul. 31, 2014	Dec. 31, 2013	Subsequent Event [Member]
Common Stock, par value	$0.01	'	$0.01	'
Treasury Stock, Shares, Acquired	1,609,496	'	'	472,200
Treasury Stock, Value, Acquired, Cost Method	$127.20	'	'	$35.70
Stock Repurchase Program, Authorized Amount	'	150	'	'
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$90.50	'	'	'

Noncontrolling_Interests_in_Su2

Noncontrolling Interests in Subsidiaries (Details) (USD $)	3 Months Ended		9 Months Ended
Noncontrolling Interests in Subsidiaries (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	$107,562,000	'	$107,562,000	'	$24,576,000
Net Income (Loss)	33,778,000	30,769,000	75,018,000	28,704,000	'
Net Income (Loss) Attributable to Noncontrolling Interest	6,315,000	478,000	14,979,000	130,000	'
Issuance of noncontrolling interest, net of issue costs	'	'	145,924,000	'	'
Purchase of subsidiary shares from noncontrolling interests	'	'	-3,110,000	'	'
Windcat Workboats Ltd. [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Assets, Net	30,400,000	'	30,400,000	'	'
Net Income (Loss)	'	'	1,000,000	-900,000	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	'	200,000	-200,000	'
Sea-Vista [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Assets, Net	157,600,000	'	157,600,000	'	'
Net Income (Loss)	'	'	12,900,000	'	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	'	6,300,000	'	'
Illinois Corn Processing LLC [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	'	'	'	'	10,894,000
Assets, Net	67,700,000	'	67,700,000	'	'
Net Income (Loss)	'	'	29,000,000	-4,400,000	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	'	7,500,000	1,600,000	'
Offshore Marine Services [Member] \| Windcat Workboats Ltd. [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	7,610,000	'	7,610,000	'	7,541,000
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	1,341,000	'	1,341,000	'	1,600,000
Inland River Services [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Purchase of subsidiary shares from noncontrolling interests	'	'	3,100,000	'	'
Payments for Repurchase of Redeemable Noncontrolling Interest	'	'	2,100,000	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	1,000,000	'	'
Inland River Services [Member] \| Other Inland River Services Noncontrolling Interests [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	954,000	'	954,000	'	2,612,000
Shipping Services [Member] \| Sea-Vista [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	77,222,000	'	77,222,000	'	0
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%	'	49.00%	'	'
Issuance of noncontrolling interest, net of issue costs	'	'	145,700,000	'	'
Payments of Stock Issuance Costs	'	'	3,200,000	'	'
Illinois Corn Processing LLC [Member] \| Illinois Corn Processing LLC [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Noncontrolling interests in subsidiaries	18,413,000	'	18,413,000	'	'
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	$2,022,000	'	$2,022,000	'	$1,929,000
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	18.90%	'	18.90%	'	'
U.S.-flag Product Tankers [Member]	'	'	'	'	'
Noncontrolling Interests in Subsidiaries [Line Items]	'	'	'	'	'
Unrecorded Unconditional Purchase Obligation, Maximum Quantity	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	3	'	3	'	'

Earnings_Per_Common_Share_of_S2

Earnings Per Common Share of SEACOR (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2013	Jun. 30, 2014
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Outstanding Stock Awards [Member]	Outstanding Stock Awards [Member]	Outstanding Stock Awards [Member]	Outstanding Stock Awards [Member]	Two Point Five Percentage Convertible Notes [Member]	Three Point Zero Percentage Convertible Notes [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'	'	'	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	'	'	'	'	457,651	115,832	330,918	303,313	4,200,525	1,825,326
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]	'	'	'	'	'	'	'	'	'	'
Net Income (Loss) attributable to SEACOR Holdings Inc.	$27,463,000	$30,291,000	$60,039,000	$28,574,000	'	'	'	'	'	'
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	5,320,000	3,086,000	9,481,000	0	'	'	'	'	'	'
Net Income (Loss) Available to Common Stockholders, Diluted	$32,783,000	$33,377,000	$69,520,000	$28,574,000	'	'	'	'	'	'
Weighted Average Number of Shares Outstanding, Basic	19,196,121	19,964,695	19,761,620	19,843,778	'	'	'	'	'	'
Incremental Common Shares Attributable to Share-based Payment Arrangements	405,770	436,364	412,773	354,671	'	'	'	'	'	'
Incremental Common Shares Attributable to Conversion of Debt Securities	6,025,851	4,200,525	4,200,525	0	'	'	'	'	'	'
Weighted Average Number of Shares Outstanding, Diluted	25,627,742	24,601,584	24,374,918	20,198,449	'	'	'	'	'	'
Earnings Per Share, Basic	$1.43	$1.52	$3.04	$1.44	'	'	'	'	'	'
Earnings Per Share, Diluted	$1.28	$1.36	$2.85	$1.41	'	'	'	'	'	'

Share_Based_Compensation_Share

Share Based Compensation (Share Based Compensation Plans) (Details)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Director stock awards granted	1,875
Employee Stock Purchase Plan shares issued	30,622
Restricted stock awards granted	147,645
Restricted stock awards forfeited	1,000
Shares released from Deferred Compensation Plan	216
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'
Stock Options, Outstanding as of December 31, 2013	1,481,280
Stock Option, Granted	151,350
Stock Option, Exercised	92,332
Stock Options, Outstanding as of September 30, 2014	1,540,298
Shares available for future grants and ESPP purchases as of September 30, 2014	1,178,003

Segment_Information_Operating_

Segment Information (Operating Results, Capital Expenditures And Assets By Reportable Segments) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	$338,936,000	$336,784,000	$977,177,000	$919,411,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Administrative and general	46,655,000	31,463,000	119,418,000	101,826,000	'
Depreciation and amortization	33,604,000	33,503,000	100,216,000	100,834,000	'
Total costs and expenses	317,935,000	304,506,000	908,192,000	883,226,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	29,869,000	19,230,000	38,842,000	33,550,000	'
Operating Income (Loss)	50,870,000	51,508,000	107,827,000	69,735,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	-2,538,000	-303,000	-2,681,000	-3,235,000	'
Foreign currency gains (losses), net	-3,059,000	2,230,000	-1,538,000	-2,697,000	'
Other Nonoperating Income (Expense)	111,000	477,000	6,669,000	675,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	972,000	230,000	2,681,000	7,071,000	'
Income from Continuing Operations Before Income Tax Expense and Equity in Earnings of 50% or Less Owned Companies	48,416,000	46,523,000	107,322,000	53,264,000	'
Capital Expenditures	'	'	311,094,000	146,483,000	'
Property, Plant and Equipment, Gross	2,166,509,000	'	2,166,509,000	'	2,199,183,000
Accumulated depreciation	889,993,000	'	889,993,000	'	866,330,000
Construction in progress	284,362,000	'	284,362,000	'	143,482,000
Net property and equipment	1,560,878,000	'	1,560,878,000	'	1,476,335,000
Inventories	20,896,000	'	20,896,000	'	27,615,000
Goodwill	62,904,000	'	62,904,000	'	17,985,000
Intangible Assets, Net	34,306,000	'	34,306,000	'	12,423,000
Total assets	3,291,070,000	2,851,724,000	3,291,070,000	2,851,724,000	3,116,233,000
Offshore Marine Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	135,143,000	156,173,000	402,314,000	418,815,000	'
Inland River Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	59,297,000	51,950,000	171,508,000	148,153,000	'
Shipping Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	51,659,000	48,200,000	157,635,000	142,779,000	'
Ethanol and Industrial Alcohol [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	53,813,000	52,580,000	'	'	'
Illinois Corn Processing LLC [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	'	'	185,267,000	146,807,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Sales Revenue, Goods, Net	'	'	177,200,000	141,100,000	'
Cost of Goods Sold	'	'	139,900,000	140,100,000	'
Inventory, Raw Materials	1,800,000	2,700,000	1,800,000	2,700,000	'
Inventory, Work in Process	1,300,000	2,100,000	1,300,000	2,100,000	'
Other Segments [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	39,024,000	27,881,000	60,453,000	62,857,000	'
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	338,936,000	336,784,000	977,177,000	919,411,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	237,676,000	239,540,000	688,558,000	680,566,000	'
Administrative and general	46,655,000	31,463,000	119,418,000	101,826,000	'
Depreciation and amortization	33,604,000	33,503,000	100,216,000	100,834,000	'
Total costs and expenses	317,935,000	304,506,000	908,192,000	883,226,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	29,869,000	19,230,000	38,842,000	33,550,000	'
Operating Income (Loss)	50,870,000	51,508,000	107,827,000	69,735,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	-2,538,000	-303,000	-2,681,000	-3,235,000	'
Foreign currency gains (losses), net	-3,059,000	2,230,000	-1,538,000	-2,697,000	'
Other Nonoperating Income (Expense)	111,000	477,000	6,669,000	675,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	972,000	230,000	2,681,000	7,071,000	'
Capital Expenditures	'	'	311,094,000	146,483,000	'
Property, Plant and Equipment, Gross	2,166,509,000	2,208,315,000	2,166,509,000	2,208,315,000	'
Accumulated depreciation	889,993,000	835,604,000	889,993,000	835,604,000	'
Property, Plant and Equipment, Net In Service	1,276,516,000	1,372,711,000	1,276,516,000	1,372,711,000	'
Construction in progress	284,362,000	129,481,000	284,362,000	129,481,000	'
Net property and equipment	1,560,878,000	1,502,192,000	1,560,878,000	1,502,192,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	444,826,000	365,891,000	444,826,000	365,891,000	'
Inventories	20,896,000	25,442,000	20,896,000	25,442,000	'
Goodwill	62,904,000	17,978,000	62,904,000	17,978,000	'
Intangible Assets, Net	34,306,000	13,583,000	34,306,000	13,583,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	339,408,000	318,297,000	339,408,000	318,297,000	'
Operating Segments [Member] \| Offshore Marine Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	135,178,000	156,198,000	402,426,000	418,892,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	90,736,000	95,113,000	278,534,000	282,725,000	'
Administrative and general	14,514,000	14,132,000	43,100,000	43,194,000	'
Depreciation and amortization	16,269,000	16,470,000	49,021,000	49,217,000	'
Total costs and expenses	121,519,000	125,715,000	370,655,000	375,136,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	3,219,000	15,343,000	14,483,000	25,577,000	'
Operating Income (Loss)	16,878,000	45,826,000	46,254,000	69,333,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	-33,000	32,000	-164,000	357,000	'
Foreign currency gains (losses), net	-1,870,000	1,937,000	-441,000	-2,160,000	'
Other Nonoperating Income (Expense)	0	0	14,739,000	11,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	2,529,000	1,527,000	7,414,000	10,534,000	'
Segment Profit (Loss)	17,504,000	49,322,000	67,802,000	78,075,000	'
Capital Expenditures	'	'	63,377,000	85,324,000	'
Property, Plant and Equipment, Gross	1,124,701,000	1,160,334,000	1,124,701,000	1,160,334,000	'
Accumulated depreciation	495,272,000	457,454,000	495,272,000	457,454,000	'
Property, Plant and Equipment, Net In Service	629,429,000	702,880,000	629,429,000	702,880,000	'
Construction in progress	71,880,000	95,552,000	71,880,000	95,552,000	'
Net property and equipment	701,309,000	798,432,000	701,309,000	798,432,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	110,648,000	99,191,000	110,648,000	99,191,000	'
Inventories	4,755,000	6,187,000	4,755,000	6,187,000	'
Goodwill	13,367,000	13,367,000	13,367,000	13,367,000	'
Intangible Assets, Net	2,350,000	4,116,000	2,350,000	4,116,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	140,805,000	160,248,000	140,805,000	160,248,000	'
Total assets	973,234,000	1,081,541,000	973,234,000	1,081,541,000	'
Operating Segments [Member] \| Inland River Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	59,932,000	52,742,000	173,898,000	150,176,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	43,947,000	38,473,000	128,668,000	110,055,000	'
Administrative and general	3,520,000	3,431,000	11,692,000	11,376,000	'
Depreciation and amortization	7,841,000	6,869,000	22,775,000	21,031,000	'
Total costs and expenses	55,308,000	48,773,000	163,135,000	142,462,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	26,429,000	783,000	28,092,000	5,776,000	'
Operating Income (Loss)	31,053,000	4,752,000	38,855,000	13,490,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	0	0	0	0	'
Foreign currency gains (losses), net	-450,000	-89,000	-303,000	-7,000	'
Other Nonoperating Income (Expense)	0	0	-38,000	0	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	-95,000	80,000	-3,842,000	-2,306,000	'
Segment Profit (Loss)	30,508,000	4,743,000	34,672,000	11,177,000	'
Capital Expenditures	'	'	48,402,000	22,138,000	'
Property, Plant and Equipment, Gross	501,594,000	473,349,000	501,594,000	473,349,000	'
Accumulated depreciation	159,003,000	140,747,000	159,003,000	140,747,000	'
Property, Plant and Equipment, Net In Service	342,591,000	332,602,000	342,591,000	332,602,000	'
Construction in progress	29,793,000	23,814,000	29,793,000	23,814,000	'
Net property and equipment	372,384,000	356,416,000	372,384,000	356,416,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	90,356,000	57,445,000	90,356,000	57,445,000	'
Inventories	2,389,000	2,277,000	2,389,000	2,277,000	'
Goodwill	2,718,000	2,759,000	2,718,000	2,759,000	'
Intangible Assets, Net	6,797,000	8,049,000	6,797,000	8,049,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	58,476,000	45,881,000	58,476,000	45,881,000	'
Total assets	533,120,000	472,827,000	533,120,000	472,827,000	'
Operating Segments [Member] \| Shipping Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	51,659,000	48,200,000	157,635,000	142,779,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	29,068,000	28,215,000	84,083,000	84,383,000	'
Administrative and general	5,883,000	5,133,000	17,200,000	16,434,000	'
Depreciation and amortization	6,730,000	7,841,000	21,599,000	23,545,000	'
Total costs and expenses	41,681,000	41,189,000	122,882,000	124,362,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	-2,000	3,104,000	-43,000	149,000	'
Operating Income (Loss)	9,976,000	10,115,000	34,710,000	18,566,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	0	0	0	0	'
Foreign currency gains (losses), net	-27,000	6,000	-36,000	-9,000	'
Other Nonoperating Income (Expense)	123,000	540,000	-3,652,000	742,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	-2,188,000	-1,413,000	129,000	-3,321,000	'
Segment Profit (Loss)	7,884,000	9,248,000	31,151,000	15,978,000	'
Capital Expenditures	'	'	180,736,000	36,218,000	'
Property, Plant and Equipment, Gross	455,765,000	495,877,000	455,765,000	495,877,000	'
Accumulated depreciation	207,482,000	216,270,000	207,482,000	216,270,000	'
Property, Plant and Equipment, Net In Service	248,283,000	279,607,000	248,283,000	279,607,000	'
Construction in progress	181,953,000	7,323,000	181,953,000	7,323,000	'
Net property and equipment	430,236,000	286,930,000	430,236,000	286,930,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	204,580,000	123,354,000	204,580,000	123,354,000	'
Inventories	1,173,000	1,794,000	1,173,000	1,794,000	'
Goodwill	1,852,000	1,852,000	1,852,000	1,852,000	'
Intangible Assets, Net	434,000	1,002,000	434,000	1,002,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	19,959,000	19,480,000	19,959,000	19,480,000	'
Total assets	658,234,000	434,412,000	658,234,000	434,412,000	'
Operating Segments [Member] \| Ethanol and Industrial Alcohol [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	53,813,000	52,580,000	'	'	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	44,461,000	52,390,000	'	'	'
Administrative and general	463,000	428,000	'	'	'
Depreciation and amortization	1,055,000	1,489,000	'	'	'
Total costs and expenses	45,979,000	54,307,000	'	'	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	0	'	'	'
Operating Income (Loss)	7,834,000	-1,727,000	'	'	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	-2,674,000	1,129,000	'	'	'
Foreign currency gains (losses), net	0	0	'	'	'
Other Nonoperating Income (Expense)	0	0	'	'	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	'	'	'
Segment Profit (Loss)	5,160,000	-598,000	'	'	'
Operating Segments [Member] \| Illinois Corn Processing LLC [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	'	'	185,267,000	146,807,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	'	'	148,164,000	145,837,000	'
Administrative and general	'	'	1,568,000	1,566,000	'
Depreciation and amortization	'	'	3,055,000	4,467,000	'
Total costs and expenses	'	'	152,787,000	151,870,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	0	0	'
Operating Income (Loss)	'	'	32,480,000	-5,063,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	'	'	-3,475,000	1,641,000	'
Foreign currency gains (losses), net	'	'	0	0	'
Other Nonoperating Income (Expense)	'	'	493,000	0	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	'	'	0	0	'
Segment Profit (Loss)	'	'	29,498,000	-3,422,000	'
Capital Expenditures	'	'	2,485,000	656,000	'
Property, Plant and Equipment, Gross	47,155,000	43,812,000	47,155,000	43,812,000	'
Accumulated depreciation	14,423,000	10,081,000	14,423,000	10,081,000	'
Property, Plant and Equipment, Net In Service	32,732,000	33,731,000	32,732,000	33,731,000	'
Construction in progress	195,000	632,000	195,000	632,000	'
Net property and equipment	32,927,000	34,363,000	32,927,000	34,363,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	0	0	0	0	'
Inventories	10,076,000	12,856,000	10,076,000	12,856,000	'
Goodwill	0	0	0	0	'
Intangible Assets, Net	0	29,000	0	29,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	12,426,000	6,765,000	12,426,000	6,765,000	'
Total assets	55,429,000	54,013,000	55,429,000	54,013,000	'
Operating Segments [Member] \| Other Segments [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	39,024,000	27,881,000	60,453,000	62,857,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	30,099,000	26,141,000	51,499,000	59,589,000	'
Administrative and general	8,629,000	1,429,000	15,189,000	4,408,000	'
Depreciation and amortization	649,000	92,000	816,000	287,000	'
Total costs and expenses	39,377,000	27,662,000	67,504,000	64,284,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	0	-409,000	1,907,000	'
Operating Income (Loss)	-353,000	219,000	-7,460,000	480,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	205,000	-380,000	972,000	12,000	'
Foreign currency gains (losses), net	-121,000	15,000	-59,000	-321,000	'
Other Nonoperating Income (Expense)	42,000	-3,000	-4,796,000	51,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	726,000	36,000	-1,020,000	2,164,000	'
Segment Profit (Loss)	499,000	-113,000	-12,363,000	2,386,000	'
Capital Expenditures	'	'	148,000	384,000	'
Property, Plant and Equipment, Gross	7,133,000	3,992,000	7,133,000	3,992,000	'
Accumulated depreciation	3,827,000	600,000	3,827,000	600,000	'
Property, Plant and Equipment, Net In Service	3,306,000	3,392,000	3,306,000	3,392,000	'
Construction in progress	235,000	2,119,000	235,000	2,119,000	'
Net property and equipment	3,541,000	5,511,000	3,541,000	5,511,000	'
Investments, at Equity, and Advances to 50% or Less Owned Companies	39,242,000	85,901,000	39,242,000	85,901,000	'
Inventories	2,503,000	2,328,000	2,503,000	2,328,000	'
Goodwill	44,967,000	0	44,967,000	0	'
Intangible Assets, Net	24,725,000	387,000	24,725,000	387,000	'
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	86,119,000	62,863,000	86,119,000	62,863,000	'
Total assets	201,097,000	156,990,000	201,097,000	156,990,000	'
Operating Segments [Member] \| Corporate And Eliminations [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	-670,000	-817,000	-2,502,000	-2,100,000	'
Costs and Expenses [Abstract]	'	'	'	'	'
Operating Expenses	-635,000	-792,000	-2,390,000	-2,023,000	'
Administrative and general	13,646,000	6,910,000	30,669,000	24,848,000	'
Depreciation and amortization	1,060,000	742,000	2,950,000	2,287,000	'
Total costs and expenses	14,071,000	6,860,000	31,229,000	25,112,000	'
Gain (Loss) on Sale of Assets and Asset Impairment Charges	223,000	0	-3,281,000	141,000	'
Operating Income (Loss)	-14,518,000	-7,677,000	-37,012,000	-27,071,000	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Derivative gains (losses), net	-36,000	-1,084,000	-14,000	-5,245,000	'
Foreign currency gains (losses), net	-591,000	361,000	-699,000	-200,000	'
Other Nonoperating Income (Expense)	-54,000	-60,000	-77,000	-129,000	'
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0	'
Capital Expenditures	'	'	15,946,000	1,763,000	'
Property, Plant and Equipment, Gross	30,161,000	30,951,000	30,161,000	30,951,000	'
Accumulated depreciation	9,986,000	10,452,000	9,986,000	10,452,000	'
Property, Plant and Equipment, Net In Service	20,175,000	20,499,000	20,175,000	20,499,000	'
Construction in progress	306,000	41,000	306,000	41,000	'
Net property and equipment	20,481,000	20,540,000	20,481,000	20,540,000	'
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	21,623,000	23,060,000	21,623,000	23,060,000	'
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	-35,000	25,000	-112,000	77,000	'
Intersegment Eliminations [Member] \| Inland River Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	-635,000	792,000	-2,390,000	2,023,000	'
Intersegment Eliminations [Member] \| Shipping Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	0	0	0	0	'
Intersegment Eliminations [Member] \| Ethanol and Industrial Alcohol [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	0	0	'	'	'
Intersegment Eliminations [Member] \| Illinois Corn Processing LLC [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	'	'	0	0	'
Intersegment Eliminations [Member] \| Other Segments [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	0	0	0	0	'
Intersegment Eliminations [Member] \| Corporate And Eliminations [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Operating Revenues	670,000	-817,000	2,502,000	-2,100,000	'
Segment Reconciling Items [Member]	'	'	'	'	'
Other Income and Expenses [Abstract]	'	'	'	'	'
Other Income (Expense) not included in Segment Profit	-3,032,000	7,389,000	2,955,000	11,214,000	'
Less Equity Earnings (Loss) included in Segment Profit	-972,000	-230,000	-2,681,000	-7,071,000	'
Cash And Near Cash Assets	$827,852,000	$608,341,000	$827,852,000	$608,341,000	'

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating Revenues	$338,936	$336,784	$977,177	$919,411
Administrative and general	46,655	31,463	119,418	101,826
Depreciation and amortization	33,604	33,503	100,216	100,834
Total costs and expenses	317,935	304,506	908,192	883,226
Gain (Loss) on Sale of Assets and Asset Impairment Charges	29,869	19,230	38,842	33,550
Operating Income (Loss)	50,870	51,508	107,827	69,735
Nonoperating Income (Expense)	-2,454	-4,985	-505	-16,471
Income Tax Expense (Benefit)	-15,610	-15,984	-34,985	-21,306
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	972	230	2,681	7,071
Net Income (Loss)	33,778	30,769	75,018	28,704
SES Business [Member]	'	'	'	'
Nonoperating Income (Expense)	'	'	'	-1,537
Income Tax Expense (Benefit)	'	'	'	538
Net Income (Loss)	'	'	'	-999
SEI [Member]	'	'	'	'
Nonoperating Income (Expense)	'	'	'	-143
Income Tax Expense (Benefit)	'	'	'	50
Net Income (Loss)	'	'	'	-93
Era Group [Member]	'	'	'	'
Operating Revenues	'	'	'	22,892
Operating Expenses	'	'	'	14,076
Administrative and general	'	'	'	2,653
Depreciation and amortization	'	'	'	3,875
Total costs and expenses	'	'	'	20,604
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	548
Operating Income (Loss)	'	'	'	2,836
Nonoperating Income (Expense)	'	'	'	-1,316
Income Tax Expense (Benefit)	'	'	'	-10,818
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	'	'	'	65
Net Income (Loss)	'	'	'	($9,233)