Seacor (CKH) 10-K 3 Mar 14 2013 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 26, 2014	Jun. 30, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'SEACOR HOLDINGS INC /NEW/	'	'
Entity Central Index Key	'0000859598	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	20,388,850	'
Entity Public Float	'	'	$1,564,670,305

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$527,435	$248,204
Restricted cash	12,175	28,285
Marketable Securities	24,292	21,668
Receivables:	'	'
Trade, net of allowance for doubtful accounts of $3,652 and $4,212 in 2011 and 2010, respectively	215,768	224,944
Other Receivables, Net, Current	48,181	45,334
Inventory, Net	27,615	25,787
Deferred income taxes	116	3,530
Prepaid expenses and other	6,701	12,719
Assets of Disposal Group, Including Discontinued Operation, Current	0	108,153
Total current assets	862,283	718,624
Property and Equipment	2,199,183	2,238,383
Accumulated depreciation	866,330	763,803
Property, Plant and Equipment, Net In Service	1,332,853	1,474,580
Construction in Progress, Gross	143,482	110,296
Net property and equipment	1,476,335	1,584,876
Investments, at Equity, and Advances to 50% or Less Owned Companies	440,853	272,535
Construction Reserve Funds & Title XI Reserve Funds	261,739	195,629
Goodwill	17,985	17,978
Intangible Assets, Net	12,423	15,305
Other Assets, net of allowance for doubtful accounts of $1,830 in 2010	44,615	55,123
Assets of Disposal Group, Including Discontinued Operation, Noncurrent	0	840,724
Total Assets	3,116,233	3,700,794
LIABILITIES AND EQUITY	'	'
Current portion of long-term debt	45,323	21,920
Accounts payable and accrued expenses	85,477	107,892
Accrued wages and benefits	29,510	19,303
Accrued interest	5,849	5,226
Accrued income taxes	17,733	8,089
Short sales of marketable securities	10,697	8,277
Accrued capital, repair and maintenance expenditures	19,975	8,013
Deferred revenues	6,592	6,592
Other current liabilities	33,263	40,493
Discontinued operations	0	39,836
Total current liabilities	254,419	265,641
Long-Term Debt	834,118	655,309
Deferred Income Taxes	457,827	426,027
Deferred Gains and Other Liabilities	144,441	120,401
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	490,741
Total liabilities	1,690,805	1,958,119
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; 37,219,201 and 36,740,324 shares issued in 2013 and 2012, respectively	372	367
Additional paid-in capital	1,394,621	1,330,324
Retained earnings	1,095,270	1,473,509
Shares held in treasury of 16,837,113 and 16,852,391 in 2011 and 2010, respectively, at cost	1,088,219	1,088,560
Accumulated Other Comprehensive Income (Loss), Net of Tax	-1,192	-1,986
Stockholders' equity attributable to parent, total	1,400,852	1,713,654
Noncontrolling interests in subsidiaries	24,576	29,021
Total equity	1,425,428	1,742,675
Liabilities and stockholders' equity, total	$3,116,233	$3,700,794

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Trade receivables, allowance for doubtful accounts	$1,162	$1,201
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
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,219,201	36,740,324
Treasury stock, shares	16,837,113	16,852,391

Consolidated_Statements_Of_Inc

Consolidated Statements Of Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]	'	'	'
Operating Revenues	$1,247,272	$1,308,297	$1,032,497
Costs and Expenses:	'	'	'
Operating Costs and Expenses	908,871	977,469	745,553
Administrative and general	141,348	166,743	131,772
Depreciation and amortization	134,518	131,667	106,873
Total costs and expenses	1,184,737	1,275,879	984,198
Gain (Loss) on Sale of Assets and Asset Impairment Charges	37,507	23,987	18,839
Operating Income (Loss)	100,042	56,405	67,138
Other Income (Expense):	'	'	'
Interest income	15,467	17,360	12,879
Interest expense	-42,592	-37,891	-39,759
Debt extinguishment gains (losses), net	0	-160	-99
Marketable security gains (losses), net	5,803	12,891	-7,893
Derivative gains (losses), net	-8,323	-2,812	-30,055
Foreign currency gains (losses), net	-3,351	1,631	540
Other, net	586	7,148	1,018
Nonoperating Income (Expense)	-32,410	-1,833	-63,369
Income Before Income Tax Expense (Benefit) and Equity in Earnings of 50% or Less Owned Companies	67,632	54,572	3,769
Income Tax Expense (Benefit):	'	'	'
Current	16,176	47,582	30,569
Deferred	10,571	-23,401	-27,259
Income Tax Expense (Benefit)	26,747	24,181	3,310
Income from Continuing Operations Before Equity in Earnings of 50% or Less Owned Companies	40,885	30,391	459
Income (Loss) from Equity Method Investments	7,264	-5,764	9,908
Income from Continuing Operations	48,149	24,627	10,367
Income (Loss) from Discontinued Operations, Net of Tax	-10,325	35,832	31,783
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	-10,225	'	31,783
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	37,824	60,459	42,150
Net Income (Loss) Attributable to Noncontrolling Interest	854	-756	1,094
Net Income attributable to SEACOR Holdings Inc.	36,970	61,215	41,056
Income (Loss) from Continuing Operations Attributable to Parent	'	'	$9,273
Income (Loss) from Continuing Operations, Per Basic Share	$2.37	$1.24	$0.44
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	($0.51)	$1.76	$1.50
Basic Earnings Per Common Share of SEACOR Holdings Inc.	$1.86	$3	$1.94
Income (Loss) from Continuing Operations, Per Diluted Share	$2.32	$1.22	$0.43
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	($0.50)	$1.73	$1.48
Diluted Earnings Per Common Share of SEACOR Holdings Inc.	$1.82	$2.95	$1.91
Weighted Average Common Shares Outstanding:	'	'	'
Basic	19,893,954	20,426,770	21,119,461
Diluted	20,293,287	20,775,896	21,466,843
Common Stock, Dividends, Per Share, Cash Paid	$0	$5	$0

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss), Net of Tax:	'	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$37,824	$60,459	$42,150
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	859	4,477	-1,089
Foreign currency translation adjustments	-222	833	342
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	622	2,724	3,632
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	17	21	116
Other Comprehensive Income (Loss), before Tax	1,385	9,617	-1,531
Income tax (expense) benefit, Accumulated Other Comprehensive Loss	457	3,216	-494
Other Comprehensive Income (Loss), Net of Tax	928	6,401	-1,037
Comprehensive Income	38,752	66,860	41,113
Comprehensive Income attributable to Noncontrolling Interests in Subsidiaries	933	-327	976
Comprehensive Income attributable to SEACOR Holdings Inc.	37,819	67,187	40,137
Interest Expense [Member]	'	'	'
Other Comprehensive Income (Loss), Net of Tax:	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	2,000	2,867
Equity Method Investments [Member]	'	'	'
Other Comprehensive Income (Loss), Net of Tax:	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	622	724	765
Derivative Gains (Losses) [Member]	'	'	'
Other Comprehensive Income (Loss), Net of Tax:	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	3,272	0
Interest Rate Swap [Member]	'	'	'
Other Comprehensive Income (Loss), Net of Tax:	'	'	'
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	$109	($1,710)	($4,532)

Consolidated_Statements_Of_Cha

Consolidated Statements Of Changes In Equity (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total equity	$1,425,428	$1,742,675	$1,425,428	$1,742,675	$1,808,063	$1,797,365
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	1,770	2,963	2,971	'
Exercise of stock options	'	'	18,225	8,252	8,777	'
Director stock awards	'	'	-210	-359	-363	'
Restricted stock and restricted stock units	'	'	113	348	126	'
Stock Issued During Period, Value, Acquisitions	'	'	0	585	0	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	30,652	31,359	'	'
Special Cash Dividend	'	'	0	100,385	0	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	-631	'	'	'
Stock Repurchased During Period, Value	'	'	'	119,551	71,290	'
Amortization of share awards	'	'	-14,304	-32,930	-21,589	'
Cancellation of restricted stock	'	'	0	0	0	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	2,395	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	-13,710	-10,284	'
Disposition of subsidiary with noncontrolling interests	'	'	1,125	'	49	'
Issuance of noncontrolling interests	'	'	40	83	1,853	'
Dividends paid to noncontrolling interests	'	'	4,186	2,901	2,644	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	8,396	'	36,970	61,215	41,056	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	'	854	-756	1,094	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	9,120	-2,717	37,824	60,459	42,150	'
Other Comprehensive Income (Loss), Net of Tax	'	'	928	6,401	-1,037	'
Common Stock [Member]	'	'	'	'	'	'
Total equity	372	367	372	367	364	361
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	0	0	0	'
Exercise of stock options	'	'	3	2	1	'
Director stock awards	'	'	0	0	0	'
Restricted stock and restricted stock units	'	'	2	1	2	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	0	0	'	'
Special Cash Dividend	'	'	'	0	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	0	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	0	'	'	'
Stock Repurchased During Period, Value	'	'	'	0	0	'
Amortization of share awards	'	'	0	0	0	'
Cancellation of restricted stock	'	'	0	0	0	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	0	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	0	0	'
Disposition of subsidiary with noncontrolling interests	'	'	0	'	0	'
Issuance of noncontrolling interests	'	'	0	0	0	'
Dividends paid to noncontrolling interests	'	'	0	0	0	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	0	0	0	'
Other Comprehensive Income (Loss), Net of Tax	'	'	0	0	0	'
Additional Paid-In Capital [Member]	'	'	'	'	'	'
Total equity	-1,394,621	1,330,324	-1,394,621	1,330,324	1,256,209	1,225,296
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	0	0	0	'
Exercise of stock options	'	'	18,222	8,250	8,776	'
Director stock awards	'	'	-210	-359	-363	'
Restricted stock and restricted stock units	'	'	-24	443	123	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	30,652	31,359	'	'
Special Cash Dividend	'	'	'	0	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	0	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	-631	'	'	'
Stock Repurchased During Period, Value	'	'	'	0	0	'
Amortization of share awards	'	'	-14,304	-32,930	-21,589	'
Cancellation of restricted stock	'	'	-1,564	189	365	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	303	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	0	0	'
Disposition of subsidiary with noncontrolling interests	'	'	0	'	0	'
Issuance of noncontrolling interests	'	'	0	0	0	'
Dividends paid to noncontrolling interests	'	'	0	0	0	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	0	0	0	'
Other Comprehensive Income (Loss), Net of Tax	'	'	0	0	0	'
Retained Earnings [Member]	'	'	'	'	'	'
Total equity	-1,095,270	1,473,509	-1,095,270	1,473,509	1,512,679	1,471,623
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	0	0	0	'
Exercise of stock options	'	'	0	0	0	'
Director stock awards	'	'	0	0	0	'
Restricted stock and restricted stock units	'	'	0	0	0	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	0	0	'	'
Special Cash Dividend	'	'	'	100,385	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	-415,209	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	0	'	'	'
Stock Repurchased During Period, Value	'	'	'	0	0	'
Amortization of share awards	'	'	0	0	0	'
Cancellation of restricted stock	'	'	0	0	0	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	0	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	0	0	'
Disposition of subsidiary with noncontrolling interests	'	'	0	'	0	'
Issuance of noncontrolling interests	'	'	0	0	0	'
Dividends paid to noncontrolling interests	'	'	0	0	0	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	-36,970	61,215	41,056	'
Other Comprehensive Income (Loss), Net of Tax	'	'	0	0	0	'
Shares Held In Treasury [Member]	'	'	'	'	'	'
Total equity	-1,088,219	-1,088,560	-1,088,219	-1,088,560	-971,687	-903,004
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	1,770	2,963	2,971	'
Exercise of stock options	'	'	0	0	0	'
Director stock awards	'	'	0	0	0	'
Restricted stock and restricted stock units	'	'	135	-96	1	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	0	0	'	'
Special Cash Dividend	'	'	'	0	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	0	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	0	'	'	'
Stock Repurchased During Period, Value	'	'	'	119,551	71,290	'
Amortization of share awards	'	'	0	0	0	'
Cancellation of restricted stock	'	'	1,564	-189	-365	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	0	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	0	0	'
Disposition of subsidiary with noncontrolling interests	'	'	0	'	0	'
Issuance of noncontrolling interests	'	'	0	0	0	'
Dividends paid to noncontrolling interests	'	'	0	0	0	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	0	0	0	'
Other Comprehensive Income (Loss), Net of Tax	'	'	0	0	0	'
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'	'	'
Total equity	-1,192	-1,986	-1,192	-1,986	-7,958	-7,039
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	0	0	0	'
Exercise of stock options	'	'	0	0	0	'
Director stock awards	'	'	0	0	0	'
Restricted stock and restricted stock units	'	'	0	0	0	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	0	0	'	'
Special Cash Dividend	'	'	'	0	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	-55	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	0	'	'	'
Stock Repurchased During Period, Value	'	'	'	0	0	'
Amortization of share awards	'	'	0	0	0	'
Cancellation of restricted stock	'	'	0	0	0	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	0	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	0	0	'
Disposition of subsidiary with noncontrolling interests	'	'	0	'	0	'
Issuance of noncontrolling interests	'	'	0	0	0	'
Dividends paid to noncontrolling interests	'	'	0	0	0	'
Comprehensive income:	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	0	0	0	'
Other Comprehensive Income (Loss), Net of Tax	'	'	-849	5,972	-919	'
Non-Controlling Interests In Subsidiaries [Member]	'	'	'	'	'	'
Total equity	24,576	29,021	24,576	29,021	18,456	10,128
Issuance of common stock:	'	'	'	'	'	'
Employee Stock Purchase Plan	'	'	0	0	0	'
Exercise of stock options	'	'	0	0	0	'
Director stock awards	'	'	0	0	0	'
Restricted stock and restricted stock units	'	'	0	0	0	'
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	'	'	0	0	'	'
Special Cash Dividend	'	'	'	0	'	'
Stockholders' Equity Note, Spinoff Transaction	'	'	-107	'	'	'
Stockholders Equity Note Spinoff Transaction, Value, Share Award Settlements for Spin Off	'	'	0	'	'	'
Stock Repurchased During Period, Value	'	'	'	0	0	'
Amortization of share awards	'	'	0	0	0	'
Cancellation of restricted stock	'	'	0	0	0	'
Purchase of subsidiary shares from noncontrolling interests	'	'	'	'	2,092	'
Acquisition of a subsidiary with noncontrolling interests	'	'	'	13,710	10,284	'
Disposition of subsidiary with noncontrolling interests	'	'	1,125	'	49	'
Issuance of noncontrolling interests	'	'	40	83	1,853	'
Dividends paid to noncontrolling interests	'	'	4,186	2,901	2,644	'
Comprehensive income:	'	'	'	'	'	'
Net Income (Loss) Attributable to Noncontrolling Interest	'	'	-854	-756	'	'
Other Comprehensive Income (Loss), Net of Tax	'	'	-79	429	-118	'
Windcat Acquisition [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	585	'	'
Windcat Acquisition [Member] | Common Stock [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	0	'	'
Windcat Acquisition [Member] | Additional Paid-In Capital [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	585	'	'
Windcat Acquisition [Member] | Retained Earnings [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	0	'	'
Windcat Acquisition [Member] | Shares Held In Treasury [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	0	'	'
Windcat Acquisition [Member] | Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	0	'	'
Windcat Acquisition [Member] | Non-Controlling Interests In Subsidiaries [Member]	'	'	'	'	'	'
Issuance of common stock:	'	'	'	'	'	'
Stock Issued During Period, Value, Acquisitions	'	'	'	$0	'	'

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Income from Continuing Operations	$48,149	$24,627	$10,367
Depreciation and amortization	134,518	131,667	106,873
Amortization of deferred gains on sale and leaseback transactions	10,687	16,652	22,191
Debt discount amortization, net	10,551	1,266	828
Amortization of share awards	-14,304	-32,930	-21,589
Director stock awards	211	357	359
Bad debt expense (income)	170	1,311	-56
Gains on asset dispositions and impairments, net	37,507	23,987	18,839
Debt extinguishment gains (losses), net	0	-160	-99
Marketable security gains (losses), net	5,803	12,891	-7,893
Purchases of marketable securities	7,387	40,396	117,145
Proceeds from sale of marketable securities	12,791	36,537	178,016
Derivative losses, net	-8,323	-2,812	-30,055
Cash settlements on derivative transactions, net	11,398	11,868	20,636
Foreign currency (gains) losses, net	-3,351	1,631	540
Deferred income tax expense (benefit)	10,571	-23,401	-27,259
Equity in (earnings) losses of 50% or less owned companies, net of tax	7,264	-5,764	9,908
Dividends received from 50% or less owned companies	9,490	6,606	8,346
Other, net	-1,528	-542	-484
Changes in operating assets and liabilities:	'	'	'
(Increase) decrease in receivables	-8,873	-18,775	18,562
(Increase) decrease in prepaid expenses and other assets	2,597	-6,655	1,672
Increase (decrease) in accounts payable, accrued expenses and other liabilities	4,839	-57,696	-13,473
Net cash provided by operating activities	185,026	81,487	114,628
Cash Flows from Investing Activities:	'	'	'
Payments to Acquire Property, Plant, and Equipment	195,901	239,350	165,264
Proceeds from Sale of Property, Plant, and Equipment	263,854	114,032	75,733
Investments in and advances to 50% or less owned companies	171,476	45,572	41,313
Proceeds from Equity Method Investment, Dividends or Distributions	18,268	87,275	22,422
Net advances on revolving credit line to 50% or less owned companies	0	300	4,339
Proceeds from Principal Repayments on Loans and Leases Held-for-investment	16,423	36,033	-26,742
Net (increase) decrease in restricted cash	-15,301	7,004	8,630
Net (increase) decrease in construction reserve funds and title XI funds	66,110	-64,345	-63,911
Business acquisitions, net of cash acquired	11,127	148,088	90,588
Net cash provided by (used in) investing activities	-130,768	-138,629	-174,810
Cash Flows from Financing Activities:	'	'	'
Payments on long-term debt and capital lease obligations	18,164	484,153	36,898
Net borrowings (repayments) under inventory financing arrangements	-1,526	14,600	-20,210
Proceeds from Issuance of long-term debt, net of offering costs	176,586	414,051	52,877
Proceeds from issuance of conversion option in convertible debt, net of offering costs	47,157	48,245	0
Special Cash Dividend	0	100,385	0
Common stock acquired for treasury	0	119,551	71,290
Share award settlements for Era Group employees and directors	-357	0	0
Proceeds and tax benefits from the share award plans	19,972	11,683	11,888
Purchase of subsidiary shares from noncontrolling interests	0	0	1,149
Proceeds from (Payments to) Noncontrolling Interests	-4,146	-2,818	-915
Net cash provided by (used in) financing activities	222,574	-247,528	-25,277
Effects of Exchange Rate Changes on Cash and Cash Equivalents	477	2,087	1,517
Net Increase (Decrease) in Cash and Cash Equivalents from Continuing Operations	277,309	-302,583	-83,942
Operating Activities	24,298	189,216	21,305
Investing Activities	-8,502	-7,665	-157,146
Financing Activities	-14,017	-12,919	246,260
Effect of Exchange Rate Changes on Cash and Cash Equivalents	143	673	442
Net Increase in Cash and Cash Equivalents from Discontinued Operations	1,922	169,305	110,861
Net Increase (Decrease) in Cash and Cash Equivalents	279,231	-133,278	26,919
Cash and Cash Equivalents, Beginning of Year	248,204	381,482	354,563
Cash and Cash Equivalents, End of Year	$527,435	$248,204	$381,482

Nature_Of_Operations_And_Accou

Nature Of Operations And Accounting Policies	12 Months Ended
	Dec. 31, 2013
Nature Of Operations And Accounting Policies [Abstract]	'
Nature Of Operations And Accounting Policies	'
	1	NATURE OF OPERATIONS AND ACCOUNTING POLICIES
	Nature of Operations and Segmentation. SEACOR Holdings Inc. (“SEACOR”) and its subsidiaries (collectively referred to as the “Company”) are in the business of owning, operating, investing in and marketing equipment, primarily in the offshore oil and gas, shipping and logistics industries. 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 a component 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 has identified the following reporting segments:
	Offshore Marine Services. Offshore Marine Services operates a diverse fleet of support vessels primarily servicing offshore oil and gas exploration, development and production facilities worldwide. The vessels deliver cargo and personnel to offshore installations; handle anchors and mooring equipment required to tether rigs to the seabed; tow rigs and assist in placing them on location and moving them between regions; and carry and launch equipment such as remote operated vehicles or “ROVs” used underwater in drilling, well-completion and emergencies. In addition to supporting drilling activities, Offshore Marine Services' vessels support offshore construction and maintenance work, provide accommodations for technicians and specialists, and provide standby safety support and emergency response services. Offshore Marine Services also operates a fleet of lift boats in the U.S. Gulf of Mexico supporting well intervention, work-over, decommissioning and diving operations and has a controlling interest in a business that owns and operates vessels primarily used to move personnel and supplies to offshore wind farms. In addition, Offshore Marine Services offers logistics services in support of offshore oil and gas exploration, development and production operations, including shore bases, marine transport and other supply chain management services.  Offshore Marine Services contributed 45%, 40% and 36% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Inland River Services. Inland River Services owns, operates, invests in and markets river transportation equipment primarily used for moving agricultural and industrial commodities, and chemical and petrochemical products, on the U.S. Inland River Waterways, primarily the Mississippi River, Illinois River, Tennessee River, Ohio River and their tributaries, and the Gulf Intracoastal Waterways. Internationally, Inland River Services has operations on the Magdalena River in Colombia and noncontrolling interests in operations on the Parana-Paraguay River Waterways and in a transshipment terminal at the Port of Ibicuy, Argentina. In addition to its primary barge business, Inland River Services also owns, operates and invests in high-speed multi-modal terminal facilities for both dry and liquid commodities and provides a broad range of services including machine shop, gear and engine repairs, and the repair and drydocking of barges and towboats at strategic locations on the U.S. Inland River Waterways. Inland River Services contributed 17%, 17% and 18% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Shipping Services. Shipping Services invests in, operates and leases a diversified fleet of U.S.-flag and foreign-flag marine transportation related assets, including deep-sea cargo vessels primarily servicing the U.S. coastwise petroleum trade, harbor tugs servicing vessels docking in the U.S. Gulf and East Coast ports and foreign-flag Very Large Gas Carriers ("VLGC's") through its noncontrolling investment in Dorian LPG. Additional assets and services include liner and short-sea transportation to and from ports in Florida, Puerto Rico, the Bahamas and Western Caribbean, a terminal support and bunkering operation in St. Eustatius, a U.S.-flag articulated tug and dry-bulk barge operating on the Great Lakes and technical ship management services. Shipping Services contributed 16%, 14% and 16% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Illinois Corn Processing. Illinois Corn Processing LLC ("ICP") operates an alcohol manufacturing, storage and distribution facility located in Pekin, IL. A flexible production platform and infrastructure enables ICP to produce, store, and distribute a variety of high quality alcohol used in the food, beverage, industrial, and petrochemical end-markets as well as fuel grade ethanol. The capability to produce these specialized streams differentiates ICP from other fuel ethanol plants and positions it as a key supply partner to a broad customer base. The Company obtained a controlling interest in ICP on February 1, 2012 through the acquisition of a portion of its partner's interest. ICP contributed 16% and 14% of consolidated operating revenues in 2013 and 2012, respectively.
	Other. The Company also has activities that are referred to and described under Other, which primarily include a noncontrolling investment in emergency and crisis services activities, agricultural commodity trading and logistics activities, lending and leasing activities and noncontrolling interests in various other businesses, primarily industrial aviation services businesses in Asia.
	Discontinued Operations (see Note 16). The Company reports the historical financial position, results of operations and cash flows of disposed businesses as discontinued operations when it has no continuing interest in the business. On March 16, 2012, the Company sold National Response Corporation ("NRC"), NRC Environmental Services Inc., SEACOR Response Ltd., and certain other subsidiaries (collectively the “SES Business”) to J.F. Lehman & Company, a leading, middle-market private equity firm (the "SES Business Transaction"). On December 31, 2012, the Company sold SEACOR Energy Inc. ("SEI") to Par Petroleum Corporation. On January 31, 2013, the Company completed the spin-off ("Spin-off") of Era Group Inc. (“Era Group”)by means of a dividend to SEACOR's shareholders of all the issued and outstanding common stock of Era Group.
	Basis of Consolidation. The consolidated financial statements include the accounts of SEACOR and its controlled subsidiaries. Control is generally deemed to exist if the Company has greater than 50% of the voting rights of a subsidiary. All significant intercompany accounts and transactions are eliminated in consolidation.
	Noncontrolling interests in consolidated subsidiaries are included in the consolidated balance sheets as a separate component of equity. The Company reports consolidated net income inclusive of both the Company’s and the noncontrolling interests’ share, as well as the amounts of consolidated net income attributable to each of the Company and the noncontrolling interests. If a subsidiary is deconsolidated upon a change in control, any retained noncontrolled equity investment in the former controlled subsidiary is measured at fair value and a gain or loss is recognized in net income based on such fair value. If a subsidiary is consolidated upon a change in control, any previous noncontrolled equity investment in the subsidiary is measured at fair value and a gain or loss is recognized based on such fair value.
	The Company employs the equity method of accounting for investments in 50% or less owned companies that it does not control but has the ability to exercise significant influence over the operating and financial policies of the business venture. Significant influence is generally deemed to exist if the Company has between 20% and 50% of the voting rights of a business venture. In certain circumstances, the Company may have an economic interest in excess of 50% but may not control and consolidate the business venture. Conversely, the Company may have an economic interest less than 50% but may control and consolidate the business venture. The Company reports its investments in and advances to these business ventures in the accompanying consolidated balance sheets as investments, at equity, and advances to 50% or less owned companies. The Company reports its share of earnings or losses from investments in 50% or less owned companies in the accompanying consolidated statements of income as equity in earnings (losses) of 50% or less owned companies, net of tax.
	The Company employs the cost method of accounting for investments in 50% or less owned companies it does not control or exercise significant influence. These investments in private companies are carried at cost and are adjusted only for capital distributions and other-than-temporary declines in fair value.
	Use of Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include those related to deferred revenues, allowance for doubtful accounts, useful lives of property and equipment, impairments, income tax provisions and certain accrued liabilities. Actual results could differ from those estimates and those differences may be material.
	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 this criteria is deferred until the criteria are met. Deferred revenues for the years ended December 31 were as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	6,592		$	9,845			$	20,829
	Revenues deferred during the year		—			3,806				7,402
	Revenues recognized during the year		—			(7,059		)		(18,386		)
	Balance at end of year		$	6,592		$	6,592			$	9,845
	As of December 31, 2013, deferred revenues included $6.6 million relating 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. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to August 17, 2012 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.
	The Company’s Offshore Marine Services segment earns and recognizes revenues primarily from the time charter and bareboat charter of vessels to customers based upon daily rates of hire. Under a time charter, Offshore Marine Services provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, Offshore Marine Services provides the vessel to the customer and the customer assumes responsibility for all operating expenses and risk of operation. Vessel charters may range from several days to several years. Revenues from time charters and bareboat charters are recorded and recognized as services are provided. In the U.S. Gulf of Mexico, time charter durations and rates are typically established in the context of master service agreements that govern the terms and conditions of charter.
	The Company’s Inland River Services segment earns revenues primarily from voyage affreightment contracts whereby customers are charged an established rate per ton to transport cargo from point to point. Revenues from voyage affreightment contracts are generally recognized over the progress of the voyage while the related costs are expensed as incurred. Certain of Inland River Services’ barges are operated in barge pools with other barges owned by third parties from whom Inland River Services earns and recognizes a management fee as the services are rendered. Pursuant to the pooling agreements, operating revenues and expenses of participating barges are combined and the net results are allocated on a pro-rata basis based on the number of barge days contributed by each participant. In addition, revenues are earned from equipment chartered to third parties and from the storage and demurrage of cargoes associated with affreightment activities. In both of these cases, revenues are recognized as services are rendered. Inland River Services’ tank farm and handling facility earns revenues through rental and throughput charges. Rental revenues are recognized ratably over the rental period while throughput charges are recognized as product volume moves through the facility.
	The Company’s Shipping Services segment earns revenue from the time charter, bareboat charter and voyage charter of vessels, contracts of affreightment, ship assist services and ship management agreements with vessel owners. Under a time charter, Shipping Services provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, Shipping Services provides the vessel to a customer and the customer assumes responsibility for all operating expenses and risk of operation. Revenues from time charters and bareboat charters are recognized as services are provided. Voyage contracts are contracts to carry cargoes on a single voyage basis regardless of time to complete. Contracts of affreightment are contracts for cargoes that are committed on a multi-voyage basis for various periods of time with minimum and maximum cargo tonnages specified over the period at a fixed or escalating rate per ton. Revenues for voyage contracts and contracts of affreightment are recognized over the progress of the voyage while the related costs are expensed as incurred. Ship assist services are provided by the Company's harbor towing fleet to docking and undocking cargo vessels in various ports in the U.S. Gulf of Mexico and Atlantic Coast. Revenues from ship assist services are recognized as the services are performed. Ship management agreements typically provide for technical services over a specified period of time, typically a year or more. Revenues from ship management agreements are recognized ratably over the service period.
	ICP earns revenues from the sale of alcohol, co-products and by-products. Revenues and related costs from these sales are recorded when title transfers to the buyer.
	Cash Equivalents. The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. Cash equivalents consist of U.S treasury securities, money market instruments, time deposits and overnight investments.
	Restricted Cash. Restricted cash, primarily relates to income generated from the operations of certain of Shipping Services’ U.S.-flag product tankers and consists primarily of U.S. treasury securities (see Note 9).
	Marketable Securities. Marketable equity securities with readily determinable fair values and debt securities are reported in the accompanying consolidated balance sheets as marketable securities. These investments are stated at fair value with both realized and unrealized gains and losses reported in the accompanying consolidated statements of income as marketable security gains (losses), net. Short sales of marketable securities are stated at fair value in the accompanying consolidated balance sheets with both realized and unrealized gains and losses reported in the accompanying consolidated statements of income as marketable security gains (losses), net.
	Trade Receivables. Customers of Offshore Marine Services and Shipping Services are primarily major and independent oil and gas exploration and production companies. Customers of Inland River Services are primarily major agricultural and industrial companies based within the United States. Customers of ICP include petrochemical, agricultural and industrial companies based within the United States. Customers of the Company's other business activities primarily include industrial companies and distributors. All customers are granted credit on a short-term basis and related credit risks are considered minimal. The Company routinely reviews its trade receivables and makes provisions for probable doubtful accounts; however, those provisions are estimates and actual results could differ from those estimates and those differences may be material. Trade receivables are deemed uncollectible and removed from accounts receivable and the allowance for doubtful accounts when collection efforts have been exhausted.
	Derivative Instruments. The Company accounts for derivatives through the use of a fair value concept whereby all of the Company’s derivative positions are stated at fair value in the accompanying consolidated balance sheets. Realized and unrealized gains and losses on derivatives not designated as hedges are reported in the accompanying consolidated statements of income as derivative losses, net. Realized and unrealized gains and losses on derivatives designated as cash flow hedges are reported as a component of other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income to the extent they are effective and reclassified into earnings on the same line item associated with the hedged transaction and in the same period the hedged transaction affects earnings. Any ineffective portions of cash flow hedges are reported in the accompanying consolidated statements of income as derivative losses, net. Realized and unrealized gains and losses on derivatives designated as cash flow hedges that are entered into by the Company’s 50% or less owned companies are also reported as a component of the Company’s other comprehensive income (loss) in proportion to the Company’s ownership percentage, with reclassifications and ineffective portions being included in equity in earnings (losses) of 50% or less owned companies, net of tax, in the accompanying consolidated statements of income.
	Concentrations of Credit Risk. The Company is exposed to concentrations of credit risk associated with its cash and cash equivalents, restricted cash, marketable securities and derivative instruments. The Company minimizes its credit risk relating to these positions by monitoring the financial condition of the financial institutions and counterparties involved and by primarily conducting business with large, well-established financial institutions and diversifying its counterparties. The Company does not currently anticipate nonperformance of its significant counterparties. The Company is also exposed to concentrations of credit risk relating to its receivables due from customers in the industries described above. The Company does not generally require collateral or other security to support its outstanding receivables. The Company minimizes its credit risk relating to receivables by performing ongoing credit evaluations and, to date, credit losses have not been material.
	Inventories. Inventories are stated at the lower of cost (using the first-in, first-out and average cost methods) or market. Inventories consist primarily of fuel and fuel oil in the Company’s Offshore Marine Services, Shipping Services and Inland River Services segments. Inventories in ICP consist primarily of corn, high quality alcohol and fuel alcohol. Inventories in the Company's other business activities consist of sugar, rice and salt. The Company records write-downs, as needed, to adjust the carrying amount of inventories to the lower of cost or market. During the years ended December 31, 2013, 2012, and 2011, the Company recorded market write-downs of $0.2 million, $0.2 million and $0.3 million, respectively.
	Property and Equipment. Equipment, stated at cost, is depreciated using the straight line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is typically based upon a newly built asset being placed into service and represents the point at 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 December 31, 2013, the estimated useful life (in years) of each of the Company’s major classes 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
	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’s major classes of property and equipment as of December 31 were as follows (in thousands):
			Historical			Accumulated				Net Book
			Cost(1)			Depreciation				Value
	2013
	Offshore support vessels (excluding wind farm utility)		$	1,047,119		$	(438,528	)		$	608,591
	Wind farm utility vessels		65,094			(14,121		)		50,973
	Inland river dry cargo and deck barges		241,210			(80,772		)		160,438
	Inland river liquid tank barges		85,639			(18,138		)		67,501
	Inland river towboats		61,407			(22,454		)		38,953
	U.S.-flag product tankers		318,497			(173,278		)		145,219
	RORO vessels		18,328			(3,995		)		14,333
	Harbor tugs		101,762			(34,017		)		67,745
	Ocean liquid tank barges		39,238			(7,335		)		31,903
	Terminal and manufacturing facilities		120,601			(33,594		)		87,007
	Other(2)		100,288			(40,098		)		60,190
			$	2,199,183		$	(866,330	)		$	1,332,853
	2012
	Offshore support vessels (excluding wind farm utility)		$	1,074,170		$	(398,050	)		$	676,120
Wind farm utility vessels		58,484			(6,887		)		51,597
Inland river dry cargo and deck barges		239,896			(70,407		)		169,489
Inland river liquid tank barges		106,541			(18,605		)		87,936
Inland river towboats		53,895			(20,054		)		33,841
U.S.-flag product tankers		317,894			(154,288		)		163,606
RORO vessels		15,674			(2,492		)		13,182
Harbor tugs		114,974			(32,965		)		82,009
Ocean liquid tank barges		39,073			(5,914		)		33,159
Terminal and manufacturing facilities		120,164			(20,906		)		99,258
Other(2)		97,618			(33,235		)		64,383
		$	2,238,383		$	(763,803	)		$	1,474,580
______________________
-1	Includes property and equipment acquired in business acquisitions and recorded at fair value as of the date of the acquisition.
-2	Includes land and buildings, leasehold improvements, fixed-wing aircraft, vehicles and other property and equipment.
Depreciation expense totaled $130.2 million, $126.1 million and $102.1 million in 2013, 2012 and 2011, respectively.
Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized.
Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. Capitalized interest totaled $6.4 million, $4.3 million and $5.8 million in 2013, 2012 and 2011, respectively.
Intangible Assets. The Company’s intangible assets primarily arose from business acquisitions (see Note 4) and consist of non-compete agreements, trademarks and tradenames, customer relationships, software and technology, and acquired contractual rights. These intangible assets are amortized over their estimated useful lives ranging from two to ten years. During the years ended December 31, 2013, 2012, and 2011, the Company recognized amortization expense of $4.3 million, $5.6 million and $4.8 million, respectively.
The Company’s intangible assets by type were as follows (in thousands):
		Non-Compete			Trademark/				Customer			Software/			Acquired			Total
		Agreements			Tradenames				Relationships			Technology			Contractual
															Rights
		Gross Carrying Value
Year Ended December 31, 2011		$	901		$	9,136			$	36,350		$	590		$	5,787		$	52,764
Acquired intangible assets		—			—				1,621			—			2,436			4,057
Foreign currency translation		—			—				—			—			152			152
Fully amortized intangible assets		(561		)	—				—			—			—			(561		)
ORM Transaction (see Note 5)		(300		)	(712		)		(11,384		)	(590		)	—			(12,986		)
Year Ended December 31, 2012		40			8,424				26,587			—			8,375			43,426
Acquired intangible assets		—			74				1,525			—			—			1,599
Foreign currency translation		—			—				—			—			(132		)	(132		)
Fully amortized intangible assets		—			(437		)		—						(4,772		)	(5,209		)
Year Ended December 31, 2013		$	40		$	8,061			$	28,112		$	—		$	3,471		$	39,684
		Accumulated Amortization
Year Ended December 31, 2011		$	(719	)	$	(3,722	)		$	(22,476	)	$	(246	)	$	(4,073	)	$	(31,236	)
Amortization expense		(135		)	(611		)		(3,739		)	(118		)	(1,026		)	(5,629		)
Fully amortized intangible assets		561			—				—			—			—			561
ORM Transaction (see Note 5)		268			350				7,201			364			—			8,183
Year Ended December 31, 2012		(25		)	(3,983		)		(19,014		)	—			(5,099		)	(28,121		)
Amortization expense		(8		)	(984		)		(2,454		)	—			(903		)	(4,349		)
Fully amortized intangible assets		—			437				—			—			4,772			5,209
Year Ended December 31, 2013		$	(33	)	$	(4,530	)		$	(21,468	)	$	—		$	(1,230	)	$	(27,261	)
Weighted average remaining contractual life, in years		0.92			6.42				4.79			0			4.1			5.13
Future amortization expense of intangible assets for each of the years ended December 31 is as follows (in thousands):
2014		$	3,579
2015		2,410
2016		1,385
2017		1,251
2018		989
Years subsequent to 2018		2,809
		$	12,423
Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. If the carrying values of the assets are not recoverable, as determined by the estimated undiscounted cash flows, the carrying values of the assets are reduced to fair value. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the years ended 2013, 2012 and 2011, the Company recognized impairment charges of $3.0 million, $1.2 million and $0.1 million, respectively, related to long-lived assets held for use.
Impairment of 50% or Less Owned Companies. The Company performs regular reviews of each 50% or less owned company's financial condition, the business outlook for its products and services, and its present and projected results and cash flows. When a 50% or less owned company has experienced consistent declines in financial performance or difficulties in raising capital to continue operations, and when the Company expects the decline to be other-than-temporary, the investment is written down to fair value. Actual results may vary from estimates due to the uncertainty regarding the projected financial performance of 50% or less owned companies, the severity and expected duration of declines in value, and the available liquidity in the capital markets to support the continuing operations of the 50% or less owned company. The Company did not recognize any impairment charges in the years ended December 31, 2013, 2012 and 2011.
Goodwill. Goodwill is recorded when the purchase price paid for an acquisition exceeds the fair value of net identified tangible and intangible assets acquired. The Company performs an annual impairment test of goodwill and further periodic tests to the extent indicators of impairment develop between annual impairment tests. The Company’s impairment review process compares the fair value of the reporting unit to its carrying value, including the goodwill related to the reporting unit. To determine the fair value of the reporting unit, the Company uses a discounted future cash flow approach that uses estimates for revenues, costs and appropriate discount rates, among other things. These estimates are reviewed each time the Company tests goodwill for impairment and are typically developed as part of the Company’s routine business planning and forecasting process. While the Company believes its estimates and assumptions are reasonable, variations from those estimates could produce materially different results. The Company did not recognize any goodwill impairments in the years ended December 31, 2013, 2012 and 2011. During the year ended December 31, 2012, the Company deconsolidated $37.1 million of goodwill as a result of the ORM Transaction (see Note 5).
Business Combinations. The Company recognizes, with certain exceptions, 100 percent of the fair value of assets acquired, liabilities assumed, and noncontrolling interests when the acquisition constitutes a change in control of the acquired entity. Shares issued in consideration for a business combination, contingent consideration arrangements and pre-acquisition loss and gain contingencies are all measured and recorded at their acquisition-date fair value. Subsequent changes to fair value of contingent consideration arrangements are generally reflected in earnings. Any in-process research and development assets acquired are capitalized as are certain acquisition-related restructuring costs if the criteria related to exit or disposal cost obligations are met as of the acquisition date. Acquisition-related transaction costs are expensed as incurred and any changes in an acquirer’s existing income tax valuation allowances and tax uncertainty accruals are recorded as an adjustment to income tax expense. The operating results of entities acquired are included in the accompanying consolidated statements of income from the date of acquisition (see Note 4).
Deferred Financing Costs. Deferred financing costs incurred in connection with the issuance of debt are amortized over the life of the related debt using the effective interest rate method for term loans and straight line method for revolving credit facilities. Amortization of deferred financing costs totaled $1.9 million, $0.5 million and $0.5 million for the years ended December 31, 2013, 2012 and 2011, respectively, and is included in interest expense in the accompanying consolidated statements of income.
Self-insurance Liabilities. The Company maintains hull, liability and war risk, general liability, workers compensation and other insurance customary in the industries in which it operates. Most of the insurance is obtained through SEACOR sponsored programs, with premiums charged to participating businesses based on insured asset values. Both the marine hull and liability policies have significant annual aggregate deductibles. Marine hull annual aggregate deductibles are accrued as claims are incurred by participating businesses and proportionately shared among the participating businesses. Marine liability annual aggregate deductibles are accrued based on historical loss experience and actual claims incurred. The Company also maintains self-insured health benefit plans for its participating employees. Exposure to the health benefit plans are limited by maintaining stop-loss and aggregate liability coverage. To the extent that estimated self-insurance losses, including the accrual of annual aggregate deductibles, differ from actual losses realized, the Company’s insurance reserves could differ significantly and may result in either higher or lower insurance expense in future periods.
Income Taxes. Deferred income tax assets and liabilities have been provided in recognition of the income tax effect attributable to the book and tax basis differences of assets and liabilities reported in the accompanying consolidated financial statements. Deferred tax assets or liabilities are provided using the enacted tax rates expected to apply to taxable income in the periods in which they are expected to be settled or realized. Interest and penalties relating to uncertain tax positions are recognized in interest expense and administrative and general, respectively, in the accompanying consolidated statements of income. The Company records a valuation allowance to reduce its deferred tax assets if it is more likely than not that some portion or all of the deferred tax assets will not be realized.
In the normal course of business, the Company may be subject to challenges from tax authorities regarding the amount of taxes due. These challenges may alter the timing or amount of taxable income or deductions. As part of the calculation of income tax expense, the Company determines whether the benefits of its tax positions are at least more likely than not of being sustained based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained, the Company accrues the largest amount of the tax benefit that is more likely than not of being sustained. Such accruals require management to make estimates and judgments with respect to the ultimate outcome of its tax benefits and actual results could vary materially from these estimates.
Deferred Gains – Equipment Sale-Leaseback Transactions and Financed Equipment Sales. From time to time, the Company enters into equipment sale-leaseback transactions with finance companies or provides seller financing on sales of its equipment to third parties or 50% or less owned companies. A portion of the gains realized from these transactions is not immediately recognized in income and has been recorded in the accompanying consolidated balance sheets in deferred gains and other liabilities. In sale-leaseback transactions (see Note 4), gains are deferred to the extent of the present value of future minimum lease payments and are amortized as reductions to rental expense over the applicable lease terms. In financed equipment sales (see Note 4), gains are deferred to the extent that the repayment of purchase notes is dependent on the future operations of the sold equipment and are amortized based on cash received from the buyers. Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
		2013			2012				2011
Balance at beginning of year		$	96,447		$	101,155			$	113,871
Deferred gains arising from equipment sales		26,881			23,183				12,319
Amortization of deferred gains included in operating expenses as reduction to rental expense		(10,687		)	(16,652		)		(22,191		)
Amortization of deferred gains included in gains on asset dispositions and impairments, net		(2,099		)	(11,239		)		(2,834		)
Reductions of deferred gains on repurchased equipment and other		—			—				(10		)
Balance at end of year		$	110,542		$	96,447			$	101,155
Deferred Gains – Equipment Sales to the Company’s 50% or Less Owned Companies. A portion of the gains realized from non-financed sales of the Company’s vessels and barges to its 50% or less owned companies is not immediately recognized in income and has been recorded in the accompanying consolidated balance sheets in deferred gains and other liabilities. Effective January 1, 2009, the Company adopted new accounting rules related to the sale of its equipment to its 50% or less owned companies. For transactions occurring subsequent to the adoption of the new accounting rules, gains are deferred only to the extent of the Company's uncalled capital commitments and amortized as those commitments lapse or funded amounts are returned by the 50% or less owned companies. For transactions occurring prior to the adoption of the new accounting rules, gains were deferred and are being amortized based on the Company's ownership interest, the Company's uncalled capital commitments, cash received and the applicable equipment's useful lives. Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
		2013			2012				2011
Balance at beginning of year		$	15,066		$	16,036			$	16,881
Amortization of deferred gains included in gains on asset dispositions and impairments, net		(845		)	(970		)		(845		)
Balance at end of year		$	14,221		$	15,066			$	16,036
Stock Based Compensation. Stock based compensation is amortized to compensation expense on a straight line basis over the requisite service period of the grants using the Black-Scholes valuation model. The Company will reconsider its use of this model if additional information becomes available in the future that indicates another model would be more appropriate or if grants issued in future periods have characteristics that cannot be reasonably estimated using this model. The Company does not estimate forfeitures in its expense calculations as forfeiture history has been minor. The Company presents the excess tax benefits from the exercise of stock options as a financing cash flow in the accompanying consolidated statements of cash flows.
Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive income (loss) were as follows:
		SEACOR Holdings Inc. Stockholders Equity													Noncontrolling
															Interests
		Foreign			Derivative				Other			Total			Foreign			Other			Other
		Currency			Losses on										Currency						Comprehensive
		Translation			Cash Flow										Translation						Income (Loss)
		Adjustments			Hedges, net										Adjustments
Year ended December 31, 2010		$	(3,995	)	$	(2,933	)		$	(111	)	$	(7,039	)	$	—		$	—
Other comprehensive income (loss)		(629		)	(900		)		116			(1,413		)	(118		)	—			$	(1,531	)
Income tax (expense) benefit		220			315				(41		)	494			—			—			494
Year ended December 31, 2011		(4,404		)	(3,518		)		(36		)	(7,958		)	(118		)	—			$	(1,037	)
Other comprehensive income (loss)		4,871			4,286				31			9,188			439			(10		)	$	9,617
Income tax (expense) benefit		(1,705		)	(1,500		)		(11		)	(3,216		)	—			—			(3,216		)
Year ended December 31, 2012		(1,238		)	(732		)		(16		)	(1,986		)	321			(10		)	$	6,401
Distribution of Era Group stock to shareholders		(55		)	—				—			(55		)	—			—
Other comprehensive income (loss)		563			731				12			1,306			74			5			$	1,385
Income tax (expense) benefit		(197		)	(256		)		(4		)	(457		)	—			—			(457		)
Year ended December 31, 2013		$	(927	)	$	(257	)		$	(8	)	$	(1,192	)	$	395		$	(5	)	$	928
Foreign Currency Translation. The assets, liabilities and results of operations of certain SEACOR subsidiaries are measured using their functional currency which is the currency of the primary foreign economic environment in which they operate. Upon consolidating these subsidiaries with SEACOR, their assets and liabilities are translated to U.S. dollars at currency exchange rates as of the balance sheet dates and their revenues and expenses are translated at the weighted average currency exchange rates during the applicable reporting periods. Translation adjustments resulting from the process of translating these subsidiaries’ financial statements are reported in other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income.
Foreign Currency Transactions. Certain SEACOR subsidiaries enter into transactions denominated in currencies other than their functional currency. Gains and losses resulting from changes in currency exchange rates between the functional currency and the currency in which a transaction is denominated are included in foreign currency gains (losses), net in the accompanying consolidated statements of income in the period in which the currency exchange rates change.
Earnings Per Share. 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 for the years ended December 31 were as follows (in thousands, except share data):
		Net Income			Average o/s Shares			Per Share
2013
Basic Weighted Average Common Shares Outstanding		$	36,970		19,893,954			$	1.86
Effect of Dilutive Securities:
Options and Restricted Stock(1)		—			399,333
Convertible Securities(2)(3)		—			—
Diluted Weighted Average Common Shares Outstanding		$	36,970		20,293,287			$	1.82
2012
Basic Weighted Average Common Shares Outstanding		$	61,215		20,426,770			$	3
Effect of Dilutive Securities:
Options and Restricted Stock(1)		—			349,126
Convertible Securities(2)		—			—
Diluted Weighted Average Common Shares Outstanding		$	61,215		20,775,896			$	2.95
2011
Basic Weighted Average Common Shares Outstanding		$	41,056		21,119,461			$	1.94
Effect of Dilutive Securities:
Options and Restricted Stock(1)		—			347,382
Diluted Weighted Average Common Shares Outstanding		$	41,056		21,466,843			$	1.91
______________________
-1	For the years ended December 31, 2013, 2012 and 2011, diluted earnings per common share of SEACOR excluded 133,315, 549,223 and 338,920, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive.
-2	For the years ended December 31, 2013 and 2012, diluted earnings per common share of SEACOR excluded 4,200,525 and 176,609 shares, respectively, issuable pursuant to the Company's 2.5% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.
-3	For the year ended December 31, 2013, diluted earnings per common share of SEACOR excluded 240,043 shares issuable pursuant to the Company's 3.0% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.
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.
Restatement of Prior Period Interim Financial Results. In February 2014, the Company discovered an error in its accounting for taxes related to the Era Group Spin-Off, which occurred on January 31, 2013. As a result, the Company will restate the condensed consolidated financial statements included in its Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, June 30 and September 30, 2013, together with an explanation of the restatements, as soon as reasonably practicable (see Note 18).

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	2	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 December 31 that are measured at fair value on a recurring basis were as follows (in thousands):
			Level 1		Level 2		Level 3
	2013
	ASSETS
	Marketable securities(1)		$	24,292	$	—	$	—
	Derivative instruments (included in other receivables)		185		6,072		—
	Construction reserve funds and Title XI reserve funds		261,739		—		—
	LIABILITIES
	Short sales of marketable securities		10,697		—		—
	Derivative instruments (included in other current liabilities)		1,511		1,828		—
	2012
	ASSETS
	Marketable securities(1)		$	21,688	$	—	$	—
	Derivative instruments (included in other receivables)		2,840		4,696		—
	Construction reserve funds and Title XI reserve funds		195,629		—		—
	LIABILITIES
	Short sales of marketable securities		8,277		—		—
	Derivative instruments (included in other current liabilities)		840		6,140		—
	______________________
	-1	Marketable security gains (losses), net include gains of $5.8 million and losses of $0.7 million and $7.5 million for the years ended December 31, 2013, 2012 and 2011, respectively, related to marketable security positions held by the Company as of December 31, 2013. Marketable security gains (losses), net include losses of $0.9 million and $7.7 million for the years ended December 31, 2012 and 2011, respectively, related to marketable security positions held by the Company as of December 31, 2012. During the years ended December 31, 2013, 2012 and 2011, the Company recorded net dividend expense on marketable securities of $0.2 million, $0.5 million and $0.8 million, respectively. During the year ended December 31, 2013, net interest income on marketable securities was not material. During the years ended December 31, 2012 and 2011, the Company recorded net interest income on marketable securities of $0.2 million and $2.8 million, respectively.
	The estimated fair value of the Company’s other financial assets and liabilities as of December 31 were as follows (in thousands).
					Estimated Fair Value
			Carrying		Level 1		Level 2		Level 3
			Amount
	2013
	ASSETS
	Cash, cash equivalents and restricted cash		$	539,610	$	539,610	$	—	$	—
	Investments, at cost, in 50% or less owned companies (included in other assets)		9,315		see below
	Notes receivable from third parties (included in other receivables and other assets)		13,544		see below
	LIABILITIES
	Long-term debt, including current portion(1)		879,441		—		1,094,193		—
	2012
	ASSETS
	Cash, cash equivalents and restricted cash		276,489		276,489		—		—
	Investments, at cost, in 50% or less owned companies (included in other assets)		9,315		see below
	Notes receivable from third parties (included in other receivables and other assets)		26,063		see below
	LIABILITIES
	Long-term debt, including current portion(2)		677,229		—		747,973		—
	______________________
	-1	The estimated fair value includes the conversion option on the Company's 2.5% and 3.0% Convertible Notes.
	-2	The estimated fair value includes the conversion option on the Company's 2.5% Convertible 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 years ended December 31 were as follows (in thousands):
			Level 1		Level 2		Level 3
	2013
	ASSETS
	Long-lived assets under construction(1)		$	17,494	$	—	$	—
	Investment in C-Lift LLC(2)		—		13,290		—
	Contribution of non-cash consideration to Dorian LPG Ltd.(3)		—		14,989		—
	Investment in Zhuhai SEACOR/Avion Logistics Company Limited (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)(4)		—		924		—
	2012
	ASSETS
	Investment in ICP(5)		$	—	$	30,916	$	—
	Long-lived assets held for sale(6)		—		8,400		—
	Investment in Witt O'Brien's (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)(7)		—		50,261		—
	______________________
	-1	During the year ended December 31, 2013, the Company recognized impairment charges of $3.0 million related to two of Shipping Services' harbor tugs while under construction, which were sold and leased back upon their completion (see Note 4).
	-2	During the year ended December 31, 2013, the Company marked its equity investment in C-Lift LLC ("C-Lift") to fair value following its acquisition of a controlling interest (see Note 4). The investment's fair value was determined based on the Company's purchase price of the acquired interest.
	-3	During the year ended December 31, 2013, the Company marked to fair value the non-cash consideration contributed to Dorian LPG Ltd. ("Dorian") in exchange for an equity investment (see Note 5). The fair value was determined based on the value of the equity investment the Company received.
	-4	During the year ended December 31, 2013, the Company marked its equity investment in Zhuhai SEACOR/Avion Logistics Company Limited, an Asian industrial aviation company, to fair value upon the deconsolidation of the previously controlled subsidiary following the sale of a portion of the Company's ownership to a third party. The investment's fair value was determined based on the purchase price of the Company's interest sold.
	-5	On February 1, 2012, the Company marked its equity investment in its ICP to fair value following the acquisition of a controlling interest (see Note 5). The investment's fair value was determined based on a fair value analysis of the assets and liabilities of ICP.
-6	During the year ended December 31, 2012, the Company recorded an impairment loss of $1.2 million to reduce the carrying value of one of its fixed-wing aircraft used in its lending and leasing activities following the conclusion of a lease.
-7	On December 31, 2012, the Company marked its equity investment in Witt O'Brien's LLC, a response management company, to fair value following the ORM Transaction (see Note 5). The investment's fair value was determined based the Company's interest in the fair value of the assets and liabilities of Witt O'Brien's.

Derivative_Instruments_And_Hed

Derivative Instruments And Hedging Strategies	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments And Hedging Strategies	'
	3	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 consolidated balance sheets. The fair values of the Company’s derivative instruments as of December 31 were as follows (in thousands):
			2013						2012
			Derivative			Derivative			Derivative			Derivative
			Asset			Liability			Asset			Liability
	Derivatives not designated as hedging instruments:
	Options on equities and equity indices		$	224		$	7		$	351		$	1
	Forward currency exchange, option and future contracts		349			213			11			160
	Interest rate swap agreements		—			1,615			—			5,884
	Commodity swap, option and future contracts:
	Exchange traded		185			1,504			2,826			736
	Non-exchange traded		5,499			—			4,348			199
			$	6,257		$	3,339		$	7,536		$	6,980
	Cash Flow Hedges. As of December 31, 2013 and December 31, 2012, there were no interest rate swap agreements designated as cash flow hedges. As of December 31, 2013, one of the Company’s Offshore Marine Services 50% or less owned companies had an interest rate swap agreement maturing in 2015 that has been designated as a cash flow hedge. This instrument calls for this company to pay a fixed interest rate of 1.48% on the amortized notional value of $16.8 million and receive a variable interest rate based on LIBOR on the amortized notional value. As of December 31, 2013, one of the Company’s Inland River Services 50% or less owned companies had three interest rate swap agreements with maturities ranging from 2014 to 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 4.16% on the aggregate amortized notional value of $28.6 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. Additionally, as of December 31, 2013, 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. This instrument calls for this company to pay a fixed interest rate of 2.79% on the amortized notional value of $37.3 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.
	The Company recognized gains (losses) on derivative instruments designated as cash flow hedges for the years December 31 as follows (in thousands):
			Other comprehensive income (loss)
			2013			2012			2011
	Interest rate swap agreements, effective portion		$	109		$	(1,710	)	$	(4,532	)
	Reclassification of derivative losses to interest expense or equity in earnings (losses) of 50% or less owned companies		622			2,724			3,632
	Reclassification of net derivative losses on cash flow hedges to derivative losses, net upon dedesignation		—			3,272			—
			$	731		$	4,286		$	(900	)
			Derivative gains (losses), net
			2013			2012			2011
	Interest rate swap agreements, ineffective portion		$	—		$	(58	)	$	(46	)
	Other Derivative Instruments. The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the years ended December 31 as follows (in thousands):
			Derivative gains (losses), net
			2013			2012			2011
	Options on equities and equity indices		$	(5,270	)	$	(680	)	$	1,693
	Forward currency exchange, option and future contracts		(451		)	837			(621		)
	Interest rate swap agreements		(37		)	(3,778		)	(1,103		)
	Commodity swap, option and future contracts:
	Exchange traded		(3,915		)	(1,020		)	(2,008		)
	Non-exchange traded		1,350			1,887			331
	U.S. treasury notes, rate locks and bond future and option contracts		—			—			(28,301		)
			$	(8,323	)	$	(2,754	)	$	(30,009	)
	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 market value of marketable security positions that the Company is either about to acquire, has acquired or is about to dispose.
	The Company enters and settles forward currency exchange, option and future contracts with respect to various foreign currencies. As of December 31, 2013, the outstanding forward currency exchange contracts translated into a net purchase of foreign currencies with an aggregate U.S. dollar equivalent of $25.9 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 has entered into various interest rate swap agreements with maturities ranging from 2014 through 2018 that call for the Company to pay fixed interest rates ranging from 2.25% to 3.05% on aggregate amortized notional values of $88.2 million and receive a variable interest rate based on LIBOR or Euribor on these notional values. As of December 31, 2013, one of the Company’s Offshore Marine Services 50% or less owned companies had 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 $103.1 million and receive a variable interest rate based on LIBOR on the amortized notional value. As of December 31, 2013, one of the Company’s Shipping Services 50% or less owned companies had entered into 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 $130.7 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. The general purpose of these interest rate swap agreements is to provide protection against increases in interest rates, which might lead to higher interest costs for the Company and its 50% or less owned companies.
	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 balances from market changes. In the Company’s agricultural 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 December 31, 2013, 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 December 31, 2013, none of these types of positions were outstanding.
	The Company enters and settles various positions in U.S. Treasury notes and bonds through rate locks, futures or options on futures tied to U.S. Treasury notes. The general purpose of these transactions is to provide value to the Company should the price of U.S. Treasury notes and bonds decline, leading to generally higher interest rates, which might lead to higher interest costs for the Company. As of December 31, 2013, none of these types of positions were outstanding.

Acquisitions_And_Dispositions

Acquisitions And Dispositions	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Acquisitions And Dispositions	'
	4	ACQUISITIONS AND DISPOSITIONS
	C-Lift Acquisition. On June 6, 2013, the Company acquired a controlling interest in C-Lift through the acquisition of its partner's 50% interest for $13.3 million in cash (see Note 5). C-Lift owns and operates two liftboats in the U.S. Gulf of Mexico. The Company performed a preliminary 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 is pending completion of a final valuation for the acquired assets and liabilities.
	Pantagro Acquisition. On June 25, 2012, the Company acquired a 95% controlling interest in Pantagro-Pantanal Produtos Agropecuarious Ltda. ("Pantagro") for $0.4 million ($0.2 million in cash and $0.2 million in a note payable). Pantagro is an Argentine agricultural trading company focusing primarily on salt. 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 fair value analysis was finalized in March 2013.
	Superior Lift Boats Acquisition. On March 30, 2012, the Company acquired 18 lift boats, real property and working capital from Superior Energy Inc. (“Superior”) for $142.5 million. The Company performed a fair value analysis and the purchase price was allocated to the acquired assets and liabilities based on their fair values resulting in no goodwill being recorded. The fair value analysis was finalized in March 2013.
	ICP Acquisition. On February 1, 2012, the Company acquired a controlling interest in ICP through its acquisition of a portion of its partner's interest for $9.1 million in cash, following which the Company owned 70% (see Note 5). ICP owns and operates an alcohol manufacturing facility dedicated to the production of alcohol for beverage, industrial and fuel applications. 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 fair value analysis of assets and liabilities acquired was finalized in June 2012.
	Lewis & Clark Acquisition. On December 31, 2011, the Company acquired certain terminal and fleeting assets from Lewis & Clark Marine, Inc. and certain related affiliates (“Lewis & Clark”) for $29.6 million. The Company performed a fair value analysis and the purchase price was allocated to the acquired assets based on their fair values resulting in no goodwill being recorded. The fair value analysis of assets and liabilities was finalized in December 2012.
	Windcat Acquisition. On December 22, 2011, the Company acquired 75% of the issued and outstanding shares in Windcat Workboats Holdings Ltd. (“Windcat”) for $22.1 million (including $21.5 million in cash during 2011 and 6,374 shares of SEACOR common stock, par value $0.01 per share (“Common Stock”) valued at $0.6 million for a final working capital settlement in 2012). Windcat, based in the United Kingdom and the Netherlands, is an operator of 29 wind farm utility vessels operating in the main offshore wind markets of Europe. 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 fair value analysis of assets and liabilities was finalized in December 2012.
	Naviera Acquisition. On December 21, 2011, the Company acquired a 70% controlling interest in SEACOR Colombia Fluvial (MI) LLC for $1.9 million in cash. SEACOR Colombia Fluvial (MI) LLC's wholly-owned subsidiary, Naviera Central S.A. (“Naviera”), is a provider of inland river barge and terminal services in Colombia. 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 $1.0 million in goodwill being recorded. The fair value analysis of assets and liabilities was finalized in December 2012.
	Soylutions Acquisition. On July 29, 2011, the Company acquired a controlling interest in Soylutions LLC (“Soylutions”) through the acquisition of its partner’s interest for $11.9 million in cash, following which the Company owned 100% (see Note 5). 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 fair value analysis was finalized in March 2012.
	G&G Shipping Acquisition. On April 13, 2011, the Company acquired certain real property, eight foreign-flag Roll-on/Roll-off (“RORO”) vessels and a controlling interest in an operating company engaged in the shipping trade between the United States, the Bahamas and the Caribbean. The operating company leases-in the real property and the RORO vessels from the Company. The Company’s purchase price of $33.5 million included cash consideration of $30.3 million and the contribution of a $3.2 million note receivable. 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 $0.6 million of goodwill being recorded. The fair value analysis was finalized in April 2011.
	PIER Acquisition. On December 1, 2009, the Company acquired all of the issued and outstanding shares of PIER Systems Inc. (“PIER”), a provider of crisis communication consulting services and software in the United States and abroad. The selling stockholders of PIER had the opportunity to receive additional consideration of up to $1.3 million, of which $0.7 million was accrued at acquisition, based upon certain performance measures over the period from the date of acquisition through May 2011. During the year ended December 31, 2011, the Company paid $0.6 million of additional consideration. During the year ended December 31, 2011, the Company accrued additional contingent consideration of $0.1 million as general and administrative expenses in the accompanying consolidated financial statements. As of December 31, 2011, the Company had paid $0.8 million, in the aggregate, of additional consideration. PIER was a wholly-owned subsidiary of ORM and was contributed to Witt-O'Brien's as part of the ORM Transaction (see Note 5).
	Purchase Price Allocation. The allocation of the purchase price for the Company’s acquisitions for the years ended December 31 was as follows (in thousands):
			2013				2012			2011
	Trade and other receivables		$	3,250			$	17,356		$	2,882
	Other current assets		32				16,282			1,105
	Investments, at Equity, and Advances to 50% or Less Owned Companies		(13,290		)		(42,358		)	(11,920		)
	Property and Equipment		43,521				178,025			137,533
	Goodwill		—				(1,586		)	3,264
	Intangible Assets		1,599				4,057			6,602
	Other Assets		—				(332		)	3,500
	Accounts payable		(264		)		(4,701		)	(3,060		)
	Other current liabilities		(1,053		)		(4,093		)	(518		)
	Long-Term Debt		(22,668		)		(946		)	(37,400		)
	Deferred Income Taxes		—				—			(1,116		)
	Other Liabilities		—				(166		)	—
	Accumulated other comprehensive loss, net of tax		—				9			—
	Noncontrolling interests in subsidiaries		—				(13,459		)	(10,284		)
	Purchase price(1)		$	11,127			$	148,088		$	90,588
	______________________
	-1	Purchase price is net of cash acquired (totaling $2.2 million, $3.7 million and $5.3 million in 2013, 2012 and 2011, respectively) and includes issued Common Stock valued at $0.6 million in 2012.
	Equipment Additions. The Company’s capital expenditures from continuing operations were $195.9 million, $239.4 million and $165.3 million in 2013, 2012 and 2011, respectively. Major equipment placed in service for the years ended December 31 were as follows (unaudited):
			2013(1)			2012(2)			2011(3)
	Offshore Support Vessels:
	Anchor handling towing supply		—			2			—
	Crew		—			—			2
	Mini-Supply		—			—			1
	Supply		1			2			—
	Specialty		2			1			—
	Wind farm utility		5			1			—
			8			6			3
	Inland River dry cargo and deck barges		—			3			55
	Inland River liquid tank barges		2			5			2
	Inland River towboats		1			2			—
	RORO vessels		1			—			—
	Harbor Tugs:
	Azimuth drive		4			—			1
	______________________
	-1	Excludes two liftboats acquired in the C-Lift acquisition.
	-2	Excludes 18 liftboats acquired in the Superior Liftboat acquisition and excludes an interest in one U.S.-flagged articulated tug barge acquired and immediately contributed to SeaJon (see Note 5).
	-3	Excludes eight foreign-flag RORO vessels acquired in the G&G Shipping Acquisition and 28 wind farm utility vessels acquired in the Windcat Acquisition.
	Equipment Dispositions. During the year ended December 31, 2013, the Company sold property and equipment for net proceeds of $274.3 million ($263.9 million in cash and $10.4 million in seller financing) and gains of $64.5 million, of which $37.6 million were recognized currently and $26.9 million were deferred (see Note 1). Equipment dispositions included the sale of one liftboat, eight liquid tank barges and seven harbor tugs for $116.3 million with leaseback terms ranging from 60 months to 120 months. Gains of $26.4 million related to these sale-leasebacks were deferred and are being amortized over their respective minimum lease periods. In addition, the Company recognized previously deferred gains of $2.9 million.
	During the year ended December 31, 2012, the Company sold property and equipment for net proceeds of $167.5 million ($114.0 million in cash, $5.0 million in cash deposits previously received and $48.5 million in seller financing) and gains of $36.2 million, of which $13.0 million were recognized currently and $23.2 million were deferred (see Note 1). Equipment dispositions included the sale of two anchor handling towing supply vessels and two harbor tugs for $84.5 million with leaseback terms ranging from 48 months to 96 months. Gains of $15.7 million related to these sale-leasebacks were deferred and are being amortized over their respective minimum lease periods. The Company also financed the sale of two offshore support vessels to certain of the Company’s 50% or less owned companies for $48.9 million, in the aggregate (see Note 5). Gains of $0.5 million from these sales were recognized currently and $7.3 million from these sales were deferred and will be recognized as payments are received under the terms of the financing. In addition, the Company recognized previously deferred gains of $12.2 million.
	During the year ended December 31, 2011, the Company sold property and equipment for net proceeds of $81.8 million ($70.7 million in cash, $2.5 million in cash deposits previously received, $7.4 million in seller financing and $1.2 million in an investment in a 50% or less owned company) and gains of $27.5 million, of which $15.2 million were recognized currently and $12.3 million were deferred (see Note 1). Equipment dispositions included the sale of one anchor handling towing supply vessel for $36.3 million with a leaseback term of 84 months. Gains of $7.7 million related to the sale-leaseback were deferred and are being amortized over the minimum lease period. The Company also financed the sale of one offshore support vessel to certain of the Company's 50% or less owned companies for $7.6 million, in the aggregate (see Note 5). Gains of $4.6 million from this sale were deferred and will be recognized as payments are received under the terms of the financing. In addition, the Company received $5.0 million in deposits on future property and equipment sales and recognized previously deferred gains of $3.7 million.
	Major equipment dispositions for the years ended December 31 were as follows (unaudited):
			2013			2012(1)			2011(2)
	Offshore Support Vessels:
	Anchor handling towing supply		—			2			1
	Crew		5			2			6
	Mini-supply		1			—			—
	Standby Safety		—			1			1
	Supply		2			2			1
	Towing supply		—			—			1
	Specialty		3			—			1
Liftboats		6			—			—
Wind farm utility		2			—			—
		19			7			11
Inland River dry cargo and deck barges		16			9			6
Inland River liquid tank barges		8			1			1
Inland River towboats		—			2			1
U.S.-flag product tankers		—			—			1
Foreign-flag RORO vessels		—			1			—
Harbor Tugs:
Azimuth drive		7			3			1
Conventional drive		1			2			1
		8			5			2
______________________
-1	Excludes one U.S.-flag articulated tug-barge contributed to SeaJon (see Note 5).
-2	Excludes four crew and one mini-supply vessel operated by Mexmar (see Note 5).

Investments_At_Equity_And_Adva

Investments, At Equity, And Advances To 50% Or Less Owned Companies	12 Months Ended
	Dec. 31, 2013
Equity Method Investment, Summarized Financial Information [Abstract]	'
Investments, At Equity, And Advances To 50% Or Less Owned Companies	'
	5	INVESTMENTS, AT EQUITY, AND ADVANCES TO 50% OR LESS OWNED COMPANIES
	Investments, at equity, and advances to 50% or less owned companies as of December 31 were as follows (in thousands):
			Ownership					2013			2012
	Offshore Marine Services:
	MexMar		49.00%					28,564			18,162
	Sea-Cat Crewzer II		50.00%					22,900			—
	Dynamic Offshore Drilling		19.00%					11,622			10,483
	Sea-Cat Crewzer		50.00%					7,833			7,183
	Nautical Power		50.00%					6,399			11,060
	OSV Partners		30.40%					3,951			—
	C-Lift		50.00%					—			5,445
	Other		20.00%	–	50.00%			17,891			14,472
								99,160			66,805
	Inland River Services:
	SCFCo Holdings		50.00%					27,710			25,351
	Bunge-SCF Grain		50.00%					17,697			19,315
	SCF Bunge Marine		50.00%					6,158			5,604
	Other		50.00%					3,846			3,574
								55,411			53,844
	Shipping Services:
	Dorian		21.80%					129,785			—
	Trailer Bridge		47.30%					57,881			60,224
	SeaJon		50.00%					9,479			6,799
								197,145			67,023
	Other:
	Witt O'Brien's(1)		54.20%					52,289			50,261
	Hawker Pacific		34.20%					21,596			23,004
	Avion		39.10%					13,127			11,152
	Other		34.00%	–	50	%		2,125			446
								89,137			84,863
								$	440,853		$	272,535
	______________________
	-1	The Company's ownership represents its economic interest in the noncontrolled company.
	Combined Condensed Financials. Summarized financial information for the Company’s investments, at equity, as of and for the years ended December 31 was as follows (in thousands):
			2013				2012
	Current assets		$	749,369			$	458,758
	Noncurrent assets		1,387,601				726,034
	Current liabilities		345,260				371,597
	Noncurrent liabilities		682,348				371,550
			2013				2012			2011
	Operating Revenues		$	1,087,637			$	774,912		$	691,189
	Costs and Expenses:
	Operating and administrative		955,583				699,061			643,612
	Depreciation		61,813				40,440			29,859
			1,017,396				739,501			673,471
	Loss on Asset Dispositions		(397		)		—			—
	Operating Income		$	69,844			$	35,411		$	17,718
	Net Income (Loss)		$	17,312			$	4,640		$	(3,252	)
	As of December 31, 2013 and 2012, cumulative undistributed net earnings of 50% or less owned companies accounted for by the equity method included in the Company’s consolidated retained earnings were $23.9 million and $24.6 million, respectively.
	MexMar. On July 1, 2011, Mantenimiento Express Maritimo, S.A.P.I. de C.V. (“MexMar”), a Mexican company that operates offshore support vessels in Mexico, executed a business reorganization plan and issued an additional equity interest to an unrelated third party for $17.1 million in cash. Subsequent to the reorganization and issuance of the additional equity interest, the Company recognized an $8.4 million gain, net of tax, which is included in equity in earnings in 50% or less owned companies in the accompanying consolidated statements of income, and received $14.9 million on the net repayment of outstanding advances from MexMar. Following the reorganization, the Company has a 49.0% interest in MexMar. During the year ended December 31, 2012, MexMar purchased two offshore support vessels from the Company and financed a portion of the vessels' mobilization costs with the Company totaling $50.0 million ($5.0 million in cash and two short-term notes totaling $45.0 million). During the year ended December 31, 2012, MexMar repaid these notes. During the year ended December 31, 2013, the Company contributed additional capital of $5.9 million and Mexmar purchased one offshore support vessel from the Company for $36.4 million ($30.4 million in cash and $6.0 million in seller financing). During the year ended December 31, 2013, MexMar repaid the $6.0 million of seller financing and and the Company provided an additional $1.7 million advance for the purchase of another offshore support vessel from a third party, which was also repaid. During the years ended December 31, 2013, 2012 and 2011, the Company received $0.3 million, $0.3 million and $0.1 million, respectively, of vessel management fees from MexMar.
	Sea-Cat Crewzer II. On January 23, 2013, the Company and another offshore support vessel operator formed Sea-Cat Crewzer II LLC (“Sea-Cat Crewzer II”) to own and operate two high speed offshore catamaran crew boats. The Company and its partner each contributed capital of $23.9 million in cash. Sea-Cat Crewzer II then purchased two high speed offshore catamaran crew boats from the Company for $47.3 million ($44.5 million in cash and $2.8 million in seller financing). During the year ended December 31, 2013, Sea-Cat Crewzer II repaid the seller financing and the Company received $0.2 million of vessel management fees from Sea-Cat Crewzer II.
	Dynamic Offshore Drilling. On April 4, 2011, the Company acquired a 19.0% interest in Dynamic Offshore Drilling Ltd. (“Dynamic”), a company established to construct and operate jack-up drilling rigs, for $10.0 million. The first jack-up drilling rig was delivered in the first quarter of 2013.
	Sea-Cat Crewzer. Sea-Cat Crewzer LLC (“Sea-Cat Crewzer”) owns and operates two high speed offshore catamaran crew boats. The Company is a guarantor of its proportionate share of Sea-Cat Crewzer’s debt and the amount of the guarantee declines as principal payments are made and will terminate when the debt is repaid. As of December 31, 2013, the Company’s guarantee was $8.4 million. During the year ended December 31, 2013, the Company received dividends of $1.3 million from Sea-Cat Crewzer. During the years ended December 31, 2013, 2012 and 2011, the Company received $0.8 million, $0.8 million and $0.8 million, respectively, of vessel management fees from Sea-Cat Crewzer. During the years ended December 31, 2013, 2012 and 2011, the Company paid $4.8 million, $2.2 million and $2.2 million, respectively, to Sea-Cat Crewzer to bareboat one of its vessels.
	Nautical Power. The Company and another offshore operator formed Nautical Power, LLC (“Nautical Power”) to operate one offshore support vessel. Nautical Power bareboat chartered the vessel from a leasing company and that charter terminated in 2013. During the year ended December 31, 2013, the Company received dividends of $5.3 million from Nautical Power.
	OSV Partners. On August 13, 2013, the Company and Breem Transportation Services LLC formed SEACOR OSV Partners GP LLC and SEACOR OSV Partners I LP (collectively "OSV Partners") to own and operate six offshore support vessels, two of which were acquired during the year ended December 31, 2013. During the year ended December 31, 2013, OSV Partners closed on a private placement equity offering with third party limited partner members, including the Company, and secured a bank financing arrangement. During the year ended December 31, 2013, the Company contributed $4.1 million in capital in exchange for a 30.4% ownership interest in OSV Partners In addition, the Company provided and was repaid bridge financing of $7.6 million. During the year ended December 31, 2013, the Company sold one offshore support vessel for $14.5 million to OSV Partners. During the year ended December 31, 2013, the Company received $0.2 million of vessel management fees from OSV Partners.
	C-Lift. C-Lift was established to construct and operate liftboats. On June 6, 2013, the Company acquired a controlling interest in C-Lift through the acquisition of its partner's 50% interest for $13.3 million in cash (see Note 4). Upon the acquisition, the Company adjusted its investment in C-Lift to fair value resulting in the recognition of a gain of $4.2 million, net of tax, which is included in equity in earnings (losses) of 50% or less owned companies in the accompanying consolidated statements of income.
	Other. The Company’s other Offshore Marine Services 50% or less owned companies operate ten vessels, nine owned and one bareboat chartered-in. During the year ended December 31, 2013, the Company received dividends of $0.9 million and made additional capital contributions and advances of $2.1 million to these 50% or less owned companies. During the years ended December 31, 2012 and 2011, the Company made no additional capital contributions to these 50% or less owned companies. Certain of these 50% or less owned companies obtained bank debt to finance the acquisition of offshore support vessels from the Company. Under the terms of the debt, the bank has the authority to require the parties of these 50% or less owned companies to fund uncalled capital commitments, as defined in the 50% or less owned companies’ partnership agreements, under certain circumstances. In such event, the Company would be required to contribute its allocable share of uncalled capital, which was $2.4 million, in the aggregate, as of December 31, 2013. During the year ended December 31, 2013, the Company sold two offshore support vessels to one of its 50% or less owned companies for $5.4 million. During the year ended December 31, 2011, the Company sold one offshore marine vessel to one of its 50% or less owned companies for $7.6 million. The Company manages certain vessels on behalf of the 50% or less owned companies and guarantees the outstanding charter receivables of one of the 50% or less owned companies if a customer defaults in payment and the Company either fails to take enforcement action against the defaulting customer or fails to assign its right of recovery against the defaulting customer. As of December 31, 2013, the Company’s contingent guarantee of outstanding charter receivables was $1.1 million. During the years ended December 31, 2013, 2012 and 2011, the Company received $0.6 million, $0.6 million and $0.6 million, respectively, of vessel management fees from these 50% or less owned companies.
	SCFCo Holdings. SCFCo Holdings LLC (“SCFCo”) was established to operate towboats and dry cargo barges on the Parana-Paraguay Rivers and a terminal facility at Port Ibicuy, Argentina. During the years ended December 31, 2013, 2012 and 2011, the Company contributed additional capital in SCFCo of $6.1 million, $3.0 million and $0.8 million, respectively. Additionally, during the year ended December 31, 2013, the Company provided working capital advances of $3.1 million and received repayments on working capital advances of $1.8 million. As of December 31, 2013, $1.3 million of working capital advances remained outstanding.
	Bunge-SCF Grain. Bunge-SCF Grain LLC (“Bunge-SCF”) operates a terminal grain elevator in Fairmont City, Illinois. During the years ended December 31, 2013 and 2012, the Company and its partner each made a working capital advances to Bunge-SCF of $2.5 million and $5.0 million, respectively. During the year ended December 31, 2013, the Company received $0.5 million of repayments of working capital advances. During the year ended December 31, 2011, the Company and its partner each contributed $17.3 million in cash to Bunge-SCF Grain. As of December 31, 2013, the total outstanding balance of working capital advances was $7.0 million. In addition, beginning July 29, 2011, Bunge-SCF Grain began operating and managing the Company’s grain storage and handling facility in McLeansboro, Illinois and the Company received $1.0 million, $1.0 million and $0.3 million in rental income for the years ended December 31, 2013, 2012 and 2011, respectively.
	SCF Bunge Marine. SCF Bunge Marine LLC (“SCF Bunge Marine”) provides towing services on the U.S. Inland River Waterways, primarily the Mississippi River, Illinois River, Tennessee River and Ohio River. The Company bareboat charters inland river towboats from a third-party leasing company and time charters the equipment to SCF Bunge Marine. The Company's obligations under the bareboat charter are guaranteed by SEACOR and its partner in SCF Bunge Marine. Pursuant to the time charter, the Company received charter fees of $40.8 million, $40.9 million and $41.0 million for the years ended December 31, 2013, 2012 and 2011, respectively. In addition, during the years ended December 31, 2013, 2012 and 2011, SCF Bunge Marine received $41.1 million, $42.6 million and $42.4 million, respectively, for towing services provided to the Company.
	Soylutions. On July 29, 2011, the Company obtained a controlling interest in Soylutions through its acquisition of its partner’s interest for $11.9 million in cash, following which the Company owned 100% (see Note 4). Upon the acquisition, the Company adjusted its investment in Soylutions to fair value resulting in the recognition of a gain of $2.3 million, net of tax, which is included in equity in earnings (losses) in 50% or less owned companies in the accompanying consolidated statements of income.
	Other. The Company’s other Inland River Services 50% or less owned companies operate a dry cargo vessel and a fabrication facility. During the year ended December 31, 2012, the Company received $0.4 million in distributions from one of these 50% or less owned companies.
	Dorian. On July 25, 2013, the Company contributed $57.0 million to Dorian in exchange for a 25% ownership interest. The contribution included $42.1 million in net cash and other consideration valued at $14.9 million that included certain progress payments made toward the construction of two VLGC's, the construction contracts for the two VLGC's, and options to construct additional VLGC's. Dorian currently operates a fleet of three VLGC's in international trade. On November 18, 2013, Dorian completed a second private placement equity offering and the Company contributed an additional $70.4 million in cash. Following the completion of the second private placement equity offering, the Company's ownership percentage was diluted to a 21.8% ownership interest and the Company recognized a $1.1 million gain, net of tax, on the accretion of its investment, which is included in equity in earnings (losses) of 50% or less owned companies in the accompanying consolidated statements of income. On February 6, 2014, Dorian completed a third private placement equity offering in which the Company did not participate and was diluted to a 19.3% ownership interest.
Trailer Bridge. Trailer Bridge, Inc. (“Trailer Bridge”), an operator of U.S.-flag deck and RORO barges, offers marine transportation services between Jacksonville, Florida, San Juan, Puerto Rico and Puerto Plata, Dominican Republic. Trailer Bridge filed for bankruptcy under Chapter 11 of the U.S. Bankruptcy Code in the United States Bankruptcy Court for the Middle District of Florida (the “Bankruptcy Court”) on November 16, 2011. On April 2, 2012, Trailer Bridge approved and adopted a restructuring plan, which was confirmed by the Bankruptcy Court. Immediately prior to adopting the restructuring plan, the Company had outstanding marketable security positions in 9.25% Senior Secured Notes due from Trailer Bridge (“Old Notes”) and U.S. Government Guaranteed Ship Financing Bonds due from Trailer Bridge (“MARAD Bonds”). Upon the adoption and implementation of Trailer Bridge's restructuring plan, the Company exchanged its Old Notes for a new $33.1 million Secured Note due from Trailer Bridge and new common shares in Trailer Bridge, representing a 47.26% ownership interest valued at $9.9 million. As a result of the adoption and implementation of the restructuring plan, the Company reclassified $48.1 million from marketable securities to investments, at equity, and advances to 50% or less owned companies, representing its investment in the new Trailer Bridge securities valued at $43.0 million and the MARAD Bonds valued at $5.1 million. In addition, as part of the restructuring plan, the Company provided $20.8 million of bridge financing to Trailer Bridge. During the year ended December 31, 2012, the Company recognized $9.8 million of marketable security gains, net related to its investments in Trailer Bridge. During the years ended December 31, 2013 and 2012, the Company received repayments of $2.1 million and $1.1 million, respectively, on the bridge financing.
SeaJon. SeaJon LLC (“SeaJon”) owns an articulated tug-barge operating in the Great Lakes trade. Each partner contributed its ownership interest in a newly constructed articulated tug-barge, which began its charter during 2012. During December 31, 2013, the Company and its partner each made capital contributions of $1.4 million. During the year ended December 31, 2012, SeaJon entered into a $40.0 million bank term loan, secured by the articulated tug-barge and the assignment of its current charter. Upon funding, SeaJon distributed $20.0 million to each of its partners. The term loan requires monthly principal and interest payments and a balloon payment of $29.7 million due April 2017. The Company is a guarantor of its proportionate share of SeaJon's debt up to a maximum of $5.0 million.
Witt O'Brien's. On December 31, 2012, the Company contributed its interest in O'Brien's Response Management Inc. ("ORM") to Witt Group Holdings, LLC (the "ORM Transaction"), which was renamed Witt O'Brien's, LLC ("Witt O'Brien's") in exchange for a 54.2% economic interest and a 50% controlling interest in Witt O'Brien's. Witt O'Brien's is a a global leader in preparedness, crisis management, and disaster response and recovery. As a result of the change in control, the Company recognized equity in losses of 50% or less owned companies of $9.7 million, net of tax, primarily related to the one-time recognition of deferred tax liabilities associated with the deconsolidation of non-deductible goodwill. During the year ended December 31, 2013, the Company received dividends of $2.0 million from Witt O'Brien's.
Hawker Pacific. Hawker Pacific Airservices, Limited (“Hawker Pacific”) is an aviation sales and support organization and a distributor of aviation components from leading manufacturers. On June 1, 2011, the Company contributed its ownership in Avion Logistics Limited (“ALL”), valued at $2.0 million, to Hawker Pacific for an additional 1.7% ownership interest bringing its total ownership percentage to 34.2%. During the year ended December 31, 2012, the Company advanced $3.3 million to Hawker Pacific at an interest rate of 10.0% per annum, which was repaid in December 2012.
Avion. Avion Pacific Limited (“Avion”) is a distributor of aircraft and aircraft related parts. During the years ended December 31, 2012 and 2011, the Company made advances of $11.0 million and $9.5 million, respectively, to Avion. During the years ended December 31, 2013, 2012 and 2011, the Company received repayments of $1.0 million, $15.7 million and $4.6 million, respectively, from Avion on these advances. As of December 31, 2013 and 2012, the Company had outstanding loans to Avion totaling $4.0 million and $5.0 million, respectively.
Illinois Corn Processing. The Company provided ICP a $10.0 million term loan with a maturity in November 2014 and a $20.0 million revolving line of credit with a maturity in January 2013 subject to certain borrowing restrictions. During the year ended December 31, 2011, the Company received principal repayments of $1.7 million on the term loan. During January 2012 and the year ended December 31, 2011, the Company made net advances $0.3 million and $4.3 million, respectively, under the revolving line of credit. In January 2012, the Company and its partner each made a capital contribution of $0.5 million. On February 1, 2012, the Company obtained a controlling interest in ICP through its acquisition of a portion of its partner’s interest for $9.1 million in cash, following which the Company owned 70% (see Note 4). Upon the acquisition, the Company adjusted its investment in ICP to fair value resulting in the recognition of a gain of $6.0 million, net of tax, which is included in equity in earnings (losses) in 50% or less owned companies in the accompanying consolidated statements of income.
Avion Logistics Limited. On June 1, 2011, the Company acquired a controlling interest in Avion Logistics Limited (“ALL”) through the acquisition of its partner’s interest for $1.0 million in cash, following which the Company owned 100%. Upon acquisition, the Company adjusted its investment in ALL to fair value resulting in the recognition of a gain of $0.3 million, net of tax, which is included in equity in earnings of 50% or less owned companies. Following this change in control, the Company contributed its ownership interest in ALL to Hawker Pacific for an additional 1.7% interest in Hawker Pacific.
Other. The Company's other 50% or less owned companies are primarily industrial aviation businesses in Asia. During the year ended December 31, 2013, the Company made $0.7 million of additional investments in these 50% or less owned companies. During the year ended December 31, 2012, the Company received $1.2 million in distributions from one of these 50% or less owned companies.

Third_Party_Notes_Receivable

Third Party Notes Receivable	12 Months Ended
	Dec. 31, 2013
Third Party Notes Receivable [Abstract]	'
Third Party Notes Receivable	'
	6	LEASES AND NOTES RECEIVABLE FROM THIRD PARTIES
	From time to time, the Company engages in lending and leasing activities involving various types of equipment. The Company recognizes interest income as payments are due, typically monthly, and expenses all costs associated with its lending and leasing activities as incurred. These leases and notes receivable are typically collateralized by the underlying equipment and require scheduled lease payments or periodic principal and interest payments. As of December 31, 2013 and 2012, the outstanding balance of leases and notes receivable from third parties was $14.5 million and $30.6 million, respectively. During the years ended December 31, 2013, 2012 and 2011, the Company made advances on notes receivable from third parties of $20.5 million, $4.1 million and $42.6 million, respectively, and received repayments on notes receivable from third parties of $33.3 million, $36.8 million and $6.8 million, respectively. During the years ended December 31, 2013, 2012 and 2011, the Company received net lease payments of $3.6 million, $3.4 million and $9.0 million, respectively, from third parties. As of December 31, 2013, none of the Company’s third party leases and notes receivable are past due or in default and the Company has made no provisions for credit losses.

Construction_Reserve_Funds

Construction Reserve Funds	12 Months Ended
	Dec. 31, 2013
Construction Reserve Funds [Abstract]	'
Construction Reserve Funds Disclosure [Text Block]	'
	7	CONSTRUCTION RESERVE FUNDS
	The Company has established, pursuant to Section 511 of the Merchant Marine Act, 1936, as amended, construction reserve fund accounts subject to agreements with the Maritime Administration. In accordance with this statute, the Company is permitted to deposit proceeds from the sale of certain vessels into the construction reserve fund accounts and defer the taxable gains realized from the sale of those vessels. Qualified withdrawals from the construction reserve fund accounts are only permitted for the purpose of acquiring qualified U.S.-flag vessels as defined in the statue and approved by the Maritime Administration. To the extent that sales proceeds are reinvested in replacement vessels, the carryover depreciable tax basis of the vessels originally sold is attributed to the U.S.-flag vessels acquired using such qualified withdrawals. The construction reserve funds must be committed for expenditure within three years of the date of sale of the equipment, subject to two one-year extensions which can be granted at the discretion of the Maritime Administration, or be released for the Company’s general use as nonqualified withdrawals. For nonqualified withdrawals, the Company is obligated to pay taxes on the previously deferred gains at the prevailing statutory tax rate plus a 1.1% penalty tax and interest thereon for the period such taxes were deferred.
	As of December 31, 2013 and 2012, the Company’s construction reserve funds of $252.1 million and $186.0 million, respectively, are classified as non-current assets in the accompanying consolidated balance sheets as the Company has the intent and ability to use the funds to acquire equipment. Construction reserve fund transactions for the years ended December 31 were as follows (in thousands):
			2013			2012			2011
	Withdrawals		$	(65,493	)	$	(122,695	)	$	(82,553	)
	Deposits		131,603			58,350			18,642
			$	66,110		$	(64,345	)	$	(63,911	)

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	8	INCOME TAXES
	Income from continuing operations before income tax expense (benefit) and equity in earnings (losses) of 50% or less owned companies derived from U.S. and foreign companies for the years ended December 31 were as follows (in thousands):
			2013				2012				2011
	United States		$	71,669			$	82,383			$	14,556
	Foreign		(7,596		)		(176		)		(5,886		)
	Eliminations and other		3,559				(27,635		)		(4,901		)
			$	67,632			$	54,572			$	3,769
	As of December 31, 2013, cumulative undistributed net earnings of foreign subsidiaries included in the Company’s consolidated retained earnings were $120.4 million.
	The Company files a consolidated U.S. federal tax return. The components of income tax expense (benefit) for the years ended December 31 were as follows (in thousands):
			2013				2012				2011
	Current:
	State		$	1,723			$	3,604			$	2,814
	Federal		6,311				36,057				18,715
	Foreign		8,142				7,921				9,040
			16,176				47,582				30,569
	Deferred:
	State		(985		)		(40		)		(615		)
	Federal		11,532				(23,572		)		(26,569		)
	Foreign		24				211				(75		)
			10,571				(23,401		)		(27,259		)
			$	26,747			$	24,181			$	3,310
	The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate on continuing operations for the years ended December 31:
			2013			2012			2011
	Statutory rate		35	%		35	%		35	%
	Non-deductible expenses		0.4	%		6.1	%		4.9	%
	Reversal of valuation allowance on foreign tax credit carryforwards		—	%		(5.5	)%		—	%
	Losses of foreign subsidiaries not benefited		5.1	%		4.2	%		17.2	%
	State taxes		0.2	%		4.2	%		32.2	%
	Other		(1.1	)%		0.3	%		(1.5	)%
			39.6	%		44.3	%		87.8	%
	During the year ended December 31, 2012, the effective rate increase associated with non-deductible expenses was primarily attributable to the Company's acceleration into 2012 of restricted stock originally scheduled to vest in 2013 and 2014.
	During the year ended December 31, 2012, the Company utilized all available foreign tax credit carryforwards and reversed a previously established valuation allowance of $3.1 million. As of December 31, 2012, the Company had no remaining foreign tax credit carryforwards.
	The components of the net deferred income tax liabilities for the years ended December 31 were as follows (in thousands):
			2013				2012
	Deferred tax liabilities:
	Property and Equipment		$	343,411			$	328,355
	Long-term Debt		56,587				36,864
	Unremitted earnings of foreign subsidiaries		40,321				41,382
	Investments in 50% or Less Owned Companies		23,573				24,392
	Other		9,050				7,235
	Total deferred tax liabilities		472,942				438,228
	Deferred tax assets:
	Share award plans		8,347				6,920
	Other		13,662				14,801
	Total deferred tax assets		22,009				21,721
	Valuation allowance		(6,778		)		(5,990		)
	Net deferred tax assets		15,231				15,731
	Net deferred tax liabilities		$	457,711			$	422,497
	During the year ended December 31, 2013, the Company increased its valuation allowance for state net operating loss carryforwards from $6.0 million to $6.8 million.
	The Company records an additional income tax benefit or expense based on the difference between the fair market value of share awards at the time of grant and the fair market value at the time of vesting or exercise. For the years ended December 31, 2013, 2012 and 2011, an additional net income tax benefit was recorded in stockholders’ equity of $1.4 million, $2.0 million and $1.8 million, respectively.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Long-term Debt, Unclassified [Abstract]	'
Long-Term Debt	'
	9	LONG-TERM DEBT
	The Company’s borrowings as of December 31 were as follows (in thousands):
			2013			2012
	3.0% Convertible Notes (excluding unamortized discount of $47.8 million)		$	230,000		$	—
	2.5% Convertible Notes (excluding unamortized discount of $40.4 million)		350,000			350,000
	7.375% Senior Notes (excluding unamortized discount of $1.0 million)		233,500			233,500
	Title XI Bonds (excluding unamortized discount of $9.3 million)		85,217			90,733
	Other (excluding unamortized discount of $1.3 million)		80,563			64,007
			979,280			738,240
	Portion due within one year		(45,323		)	(21,920		)
	Debt discount, net		(99,839		)	(61,011		)
			$	834,118		$	655,309
	The Company’s long-term debt maturities for the years ended December 31 are as follows (in thousands):
	2014		$	45,323
	2015		18,791
	2016		13,711
	2017		14,119
	2018		14,404
	Years subsequent to 2019		872,932
			$	979,280
	3.0% Convertible Senior Notes. On November 13, 2013, SEACOR completed the sale of $230.0 million aggregate principal amount of its 3.0% Convertible Senior Notes due November 15, 2028 (the “3.0% Convertible Senior Notes”). Interest on the 3.0% Convertible Senior Notes is payable semi-annually on May 15 and November 15 of each year, commencing May 15, 2014. Beginning November 15, 2020, contingent interest is payable during any subsequent semi-annual interest period if the average trading price of the 3.0% Convertible Senior Notes for a defined period is greater than or equal to $1,200 per $1,000 principal amount of the 3.0% Convertible Senior Notes. The amount of contingent interest payable for any such period will be equal to 0.45% per annum of such average trading price of the 3.0% Convertible Senior Notes. After March 31, 2014 and prior to August 15, 2028, the 3.0% Convertible Senior Notes are convertible into shares of Common Stock at the initial conversion rate ("Conversion Rate") of 7.9362 if the sales price of the Common Stock for a defined period is greater than or equal to 130% of the applicable conversion price ("Conversion Price") on each trading day. The Conversion Price for each note equals $1,000 divided by the Conversion Rate in effect. After August 15, 2028, holders may elect to convert at any time at the Conversion Price. The Company has reserved the maximum number of shares of Common Stock needed upon conversion or 1,825,326 shares as of December 31, 2013. After November 19, 2018, the 3.0% Convertible Senior Notes may be redeemed, in whole or in part, at a price equal to 100% of the principal amount, plus accrued and unpaid interest to the date of redemption. On November 19, 2020 and November 20, 2023, the holders of the 3.0% Convertible Senior Notes may require SEACOR to purchase for cash all or part of the notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest to the date of purchase. SEACOR incurred $6.3 million of net offering costs associated with the 3.0% Convertible Senior Notes sale for net proceeds of $223.7 million.
	The Company accounts separately for the liability and equity components of the 3.0% Convertible Senior Notes and the associated underwriting fees in a manner that reflects the Company's non-convertible borrowing rate. Of the total proceeds of $230.0 million received upon issuance and $6.3 million of offering costs, the Company allocated $181.5 million and $5.0 million, respectively, to the liability component and allocated $48.5 million and $1.3 million, respectively, to the equity component. The resulting debt discount and offering costs associated with the liability component is amortized as additional non-cash interest expense over the seven year period for which the debt is expected to be outstanding (November 19, 2020) for an overall effective annual interest rate of 7.4%.
	2.5% Convertible Senior Notes. On December 11, 2012, SEACOR completed the sale of $350.0 million aggregate principal amount of its 2.5% Convertible Senior Notes due December 15, 2024 (the “2.5% Convertible Senior Notes”). Interest on the 2.5% Convertible Senior Notes is payable semi-annually on June 15 and December 15 of each year. Beginning December 15, 2017, contingent interest is payable during any subsequent semi-annual interest period if the average trading price of the 2.5% Convertible Senior Notes for a defined period is greater than or equal to $1,200 per $1,000 principal amount of the 2.5% Convertible Senior Notes. The amount of contingent interest payable for any such period will be equal to 0.25% per annum of such average trading price of the 2.5% Convertible Senior Notes. Prior to September 15, 2017, the 2.5% Convertible Senior Notes are convertible into shares of Common Stock at the initial conversion rate ("Conversion Rate") of 8.6879 if the sales price of the Common Stock for a defined period is greater than or equal to 130% of the applicable conversion price ("Conversion Price") on each trading day. The Conversion Price for each note equals $1,000 divided by the Conversion Rate in effect. After September 15, 2017, holders may elect to convert at any time at the Conversion Price. On December 14, 2012, the Conversion Rate was adjusted to 9.2089 in connection with the Company's cash dividend of $5.00 per common share. On January 31, 2013, the Conversion Rate was adjusted to 12.0015 in connection with the Spin-off of Era Group from SEACOR (see Note 16). The Company has reserved the maximum number of shares of Common Stock needed upon conversion or 4,200,525 shares as of December 31, 2013. After December 19, 2015 and prior to December 19, 2017, the 2.5% Convertible Senior Notes may be redeemed, in whole or in part, at a price equal to 100% of the principal amount, plus accrued and unpaid interest to the date of redemption, plus $55 per $1,000 bond, provided the trading price of the Common Stock for a defined period exceeds 130% of the Conversion Price. After December 19, 2017, the 2.5% Convertible Senior Notes may be redeemed, in whole or in part, at a price equal to 100% of the principal amount, plus accrued and unpaid interest to the date of redemption plus $55 per $1,000 bond. On December 19, 2017 and December 19, 2022, the holders of the 2.5% Convertible Senior Notes may require SEACOR to purchase for cash all or part of the notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest to the date of purchase. SEACOR incurred $9.4 million of net offering costs associated with the 2.5% Convertible Senior Notes sale for net proceeds of $340.6 million.
	The Company accounts separately for the liability and equity components of the 2.5% Convertible Senior Notes and the associated underwriting fees in a manner that reflects the Company's non-convertible borrowing rate. Of the total proceeds of $350.0 million received upon issuance and $9.4 million of offering costs, the Company allocated $300.4 million and $8.1 million, respectively, to the liability component and allocated $49.6 million and $1.3 million, respectively, to the equity component. The resulting debt discount and offering costs associated with the liability component is amortized as additional non-cash interest expense over the five year period for which the debt is expected to be outstanding (December 19, 2017) for an overall effective annual interest rate of 6.5%.
	7.375% Senior Notes. On September 24, 2009, SEACOR issued $250.0 million aggregate principal amount of its 7.375% Senior Notes due October 1, 2019 (the “7.375% Senior Notes”). The 7.375% Senior Notes were issued under a supplemental indenture dated as of September 24, 2009 (the “2009 Supplemental Indenture”) to the base indenture relating to SEACOR’s senior debt securities, dated as of January 10, 2001, between SEACOR and U.S. Bank National Association, as trustee. Interest on the 7.375% Senior Notes is payable semi-annually on April 1 and October 1 of each year. The 7.375% Senior Notes may be redeemed at any time, in whole or in part, at a price equal to the principal amount, plus accrued and unpaid interest to the date of redemption, plus a specified “make-whole” premium. The 2009 Supplemental Indenture contained covenants including, among others, limitations on liens and sale and leasebacks of certain Principal Properties, as defined, and certain restrictions on SEACOR consolidating with or merging into any other Person, as defined.
	5.875% Senior Notes. In 2002, SEACOR sold $200.0 million aggregate principal amount of its 5.875% Senior Notes due October 1, 2012 (the “5.875% Senior Notes”). During the year ended December 31, 2012, the Company purchased $5.5 million, in principal amount, of its 5.875% Senior Notes for $5.7 million, resulting in a loss on debt extinguishment of $0.2 million. On October 1, 2012, the Company repaid the remaining outstanding principal amount of $171.0 million. During the year ended December 31, 2011, the Company purchased $2.2 million, in principal amount, of its 5.875% Senior Notes for $2.3 million, resulting in a loss on debt extinguishment of $0.1 million.
	Title XI Bonds. Three double-hull product and chemical tankers (the “Title XI tankers”) owned by subsidiaries of the Company (the “Title XI companies”) were financed through the issuance of U.S. Government Guaranteed Ship Financing Bonds (the “Title XI Bonds” or “Title XI financing”) bearing interest at 6.50% with semi-annual principal and interest payments and maturing through June 2024.
	A percentage of earnings attributable to each of the Title XI tankers’ operations is required to be deposited into Title XI reserve fund bank accounts. Cash held in these accounts is invested as prescribed by Title XI financing agreements. Withdrawals from these accounts are permitted for limited purposes, subject to the prior approval of the U.S. Maritime Administration. As of December 31, 2013 and 2012, the Title XI reserve fund account balances were $9.6 million.
	The Title XI financing agreements contain covenants restricting cash distributions subject to certain financial tests. Failure to meet these financial tests, among other things, restricts Title XI companies from (1) distributing capital; (2) paying dividends; (3) increasing employee compensation and paying other indebtedness; (4) incurring additional indebtedness; (5) making investments and (6) acquiring fixed assets. Cash distributions (as defined in the Title XI financing agreements) from a Title XI company are prohibited until such company achieves certain levels of working capital. As of December 31, 2013 and 2012, the Title XI companies held $12.2 million and $27.3 million in restricted cash that was limited in use for the operation of the tankers and cannot be used to fund the Company’s general working capital requirements. As of December 31, 2013, the Title XI companies had net assets of $60.7 million.
	In the event of default (as defined in the Title XI financing agreements), all of the Title XI tankers, in addition to the assignment of earnings relating to those vessels and the funds on deposit in the Title XI reserve fund accounts, serve as collateral for the repayment of the Title XI Bonds. The aggregate net book value as of December 31, 2013 of the Title XI tankers was $119.8 million.
	SEACOR Revolving Credit Facility. On August 9, 2013 the Company terminated its unsecured revolving credit facility that was scheduled to mature in November 2013. During the year ended December 31, 2013, the Company made no borrowings or repayments on the revolving credit facility. During the year ended December 31, 2012, the Company made net repayments of $175.0 million on the revolving credit facility. During the year ended December 31, 2011, the company drew $50.0 million on the revolving credit facility.
	Other. The Company has various other obligations including ship, equipment and facility mortgages, working capital lines and short term financing for certain agriculture commodity trading and logistics’ inventories. These obligations have maturities ranging from several days through October 2021, have interest rates ranging from 1.1% to 5.0% as of December 31, 2013, and require periodic payments of interest and principal. During the years ended December 31, 2013, 2012 and 2011, proceeds from the issuance of other debt was $1.5 million, $6.7 million and $23.0 million, respectively. During the years ended December 31, 2013, 2012 and 2011, repayments on other debt was $9.7 million, $24.5 million and $28.7 million, respectively.
	As of December 31, 2013, the Company had outstanding letters of credit totaling $27.1 million with various expiration dates through 2016.
	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.

Common_Stock_Common_Stock_Note

Common Stock Common Stock (Notes)	12 Months Ended
	Dec. 31, 2013
Common Stock [Abstract]	'
Common Stock Disclosure [Text Block]	'
	10	COMMON STOCK
	SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire Common Stock, which may be acquired through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. During the year ended December 31, 2013, the Company acquired no shares of Common Stock for treasury. During the years ended December 31, 2012 and 2011, the Company acquired for treasury 1,377,798 and 843,400 shares of Common Stock, respectively, for an aggregate purchase price of $119.6 million and $71.3 million, respectively. As of December 31, 2013, SEACOR had authorization to repurchase $100.0 million of Common Stock.
	SEACOR’s Board of Directors declared a Special Cash Dividend of $5.00 per share of Common Stock payable to stockholders of record as of December 17, 2012. On or about December 26, 2012, the Company paid these dividends totaling $100.4 million on 20,076,762 shares of Common Stock, including dividends of $0.9 million related to 171,562 outstanding restricted share awards. The Compensation Committee of SEACOR’s Board of Directors elected, at its discretion, to pay the dividend on the restricted share awards in December 2012 rather than depositing amounts in escrow pending the lapsing of restrictions.

Savings_Plans_And_Multiemploye

Savings Plans And Multiemployer Pension Plans	12 Months Ended
	Dec. 31, 2013
Deferred Compensation Arrangements [Abstract]	'
Savings Plans And Multiemployer Pension Plans	'
	11	SAVINGS AND MULTI-EMPLOYER PENSION PLANS
	SEACOR Savings Plan. The Company provides a defined contribution plan (the “Savings Plan”) for its eligible U.S.-based employees. The Company’s contribution to the Savings Plan is limited to 50% of an employee’s first 6% of wages invested in the Savings Plan and is subject to annual review by the Board of Directors of SEACOR. The Company’s Savings Plan costs were $2.2 million, $3.3 million and $3.1 million for the years ended December 31, 2013, 2012 and 2011, respectively, including discontinued operations.
	SEACOR Deferred Compensation Plan. In 2005, the Company established a non-qualified deferred compensation plan, as amended (the “Deferred Compensation Plan”) to provide certain highly compensated executives and non-employee directors the ability to defer receipt of up to 75% of their cash base salary and up to 100% of their cash bonus. Prior to a 2012 amendment, participants were eligible to defer up to 100% of their vested restricted stock (deferred in the form of Restricted Stock Units, as defined in the plan) for each fiscal year. Each participant’s compensation deferrals are credited to a bookkeeping account and, subject to certain restrictions, each participant may elect to have their cash deferrals in such account indexed against one or more investment options, solely for purposes of determining amounts payable under the Deferred Compensation Plan (the Company is not obligated to actually invest any deferred amounts in the selected investment options).
	Participants may receive a distribution of deferred amounts, plus any earnings thereon (or less any losses), on a date specified by the participant or, if earlier, upon a separation from service or upon a change of control (as defined). All distributions to participants following a separation from service shall be in the form of a lump sum, except if such separation qualifies as “retirement” under the terms of the plan, in which case it may be paid in installments if previously elected by the participant. Distributions to “Key Employees” upon a separation from service (other than due to death) will not commence until at least 6 months after the separation from service. Participants are always 100% vested in the amounts that they contribute to their Deferred Compensation Plan accounts. The Company, at its option, may contribute amounts to participants’ accounts, which may be subject to vesting requirements.
	The obligations of the Company to pay deferred compensation under the Deferred Compensation Plan are general unsecured obligations of the Company and rank equally with other unsecured indebtedness of the Company that is outstanding from time to time. As of December 31, 2013 and 2012, the Company had obligations of $0.6 million and $0.5 million, respectively, related to the Deferred Compensation Plan that are included in the accompanying consolidated balance sheets as deferred gains and other liabilities. The total amount of the Company’s obligation under the Deferred Compensation Plan will vary depending upon the level of participation by participants and the amount of compensation that participants elect to defer under the plan. The duration of the Deferred Compensation Plan is indefinite (subject to the Board of Directors’ discretion to amend or terminate the plan).
	MNOPF and MNRPF. Certain subsidiaries of the Company are participating employers in industry-wide, multi-employer, defined benefit pension funds in the United Kingdom, the United Kingdom Merchant Navy Officers Pension Fund (“MNOPF”) and the United Kingdom Merchant Navy Ratings Pension Fund (“MNRPF”). The Company’s participation in the MNOPF relates to officers employed between 1978 and 2002 and its participation in the MNRPF relates to ratings employed between 1978 and 2001 by SEACOR’s Stirling group of companies (which had been acquired by SEACOR in 2001) and its predecessors. Both of these plans are in deficit positions and depending upon the results of future actuarial valuations, it is possible that the plans could experience further funding deficits, requiring the Company to recognize payroll related operating expenses in the periods invoices are received. The Company has one active employee participating in the MNOPF plan and none in the MNRPF plan. During the years ended December 31, 2013, 2012 and 2011, contributions to the MNOPF were not material and did not exceed 5% of total contributions to the plan in any year.
	Under the direction of a court order, any deficit of the MNOPF is to be remedied through funding contributions from all participating employers. Prior to 2011, the Company was invoiced and expensed $16.7 million, representing the Company’s allocated share of the cumulative funding deficits, including portions deemed uncollectible due to the non-existence or liquidation of certain participating employers. During the year ended December 31, 2013, based on an actuarial valuation of the MNOPF in 2012, the Company was invoiced and expensed $2.7 million, representing the Company’s allocated share of an additional funding deficit based on that actuarial valuation.
	Based on an actuarial valuation of the MNRPF in March 2008, the Company was advised that its share of a $281.0 million (£175.0 million) accumulated funding deficit was $1.0 million (£0.6 million). The accumulated funding deficit is being recovered by additional annual contributions from current employers and is subject to adjustment following the results of future tri-annual actuarial valuations. During the year ended December 31, 2011, $0.4 million, in the aggregate, of the Company’s funding deficit had been invoiced and expensed. Based on an actuarial valuation of the MNRPF in March 2011, the Company was advised that the funding deficit had increased to $359.3 million (£217.0 million) of which the Company’s share is $0.3 million (£0.2 million). The recovery plans for the additional funding deficit are still being considered.
	AMOPP and SPP. Certain subsidiaries of the Company are participating employers in industry-wide, multi-employer defined benefit pension plans in the United States: the American Maritime Officers Pension Plan (EIN: 13-1936709) (the "AMOPP") and the Seafarers Pension Plan (EIN: 13-6100329) (the "SPP"). Certain subsidiaries of the Company also participates in the American Maritime Officers 401(k) Plan (EIN: 11-2978754) (the "AMO 401(k) Plan"), an industry-wide, multi-employer defined contribution plan. The Company’s participation in these plans relates to certain employees of the Company’s Shipping Services business segment.
	Under federal pension law, the AMOPP was deemed in critical status for the 2009 and 2010 plan years. The AMOPP was frozen in January 2010 and a ten year rehabilitation plan was adopted by the AMOPP trustees in February 2010 whereby benefit changes and increased contributions by participating employers were expected to improve the funded status of the AMOPP. The AMOPP was replaced by the AMO 401(k) Plan. On December 28, 2012, the AMOPP was elevated to endangered status primarily as a result of favorable investment performance and the rehabilitation plan adopted by the AMOPP trustees. Based on an actuarial valuation performed as of September 30, 2012, the latest period for which an actuarial valuation is available, if the Company had chose to withdraw from the AMOPP at that time, its withdrawal liability would have been $45.6 million. That liability may change in future years based on various factors, primarily employee census. As of December 31, 2013, 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.
	The SPP was neither in endangered or critical status for the 2012 plan year, the latest period for which a report is available, as the SPP was fully funded.
	In accordance with collective bargaining agreements between the Company and the American Maritime Officers (“AMO”), the latest of which expires on December 31, 2015, and the Seafarers International Union (“SIU”), the latest of which expires on September 30, 2017, the Company makes periodic contributions to the AMOPP, SPP and AMO 401(k) Plan. The contributions to these plans are expensed as incurred and are included in operating expenses in the accompanying consolidated statements of income. During the years ended December 31, 2013, 2012 and 2011, the Company made contributions of $0.9 million, $0.9 million and $0.9 million, respectively, to the AMOPP and $1.5 million, $1.3 million and $0.6 million, respectively to the SPP. During the years ended December 31, 2013, 2012 and 2011, none of the Company’s contributions to the AMOPP or the SPP exceeded 5% of total contributions to the plans and the Company did not pay any material surcharges. As of December 31, 2013, there is no required minimum future contribution to the AMOPP or the SPP. The Company’s obligations for future contributions are based upon the number of employees subject to the collective bargaining agreements, their rates of pay and the number of days worked.
	Other Plans. Certain employees participate in other defined contribution plans in the United States and various international regions including the United Kingdom and Singapore. During the years ended December 31, 2013, 2012 and 2011, the Company incurred costs of $0.5 million, $0.4 million and $0.3 million, respectively, in the aggregate related to these plans, primarily from employer matching contributions.

Share_Based_Compensation

Share Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share Based Compensation	'
	12	SHARE BASED COMPENSATION
	Share Incentive Plans. SEACOR’s stockholders approved the 2007 Share Incentive Plan to provide for the grant of options to purchase shares of Common Stock, stock appreciation rights, restricted stock, stock awards, performance awards and restricted stock units to non-employee directors, key officers and employees of the Company. The 2007 Share Incentive Plan superseded the 2003 Non-Employee Director Share Incentive Plan and the 2003 Share Incentive Plan (collectively including all predecessor plans, the “Share Incentive Plans”). The Compensation Committee of the Board of Directors administers the Share Incentive Plans. A total of 5,650,000 shares of Common Stock have been authorized for grant under the Share Incentive Plans. All shares issued pursuant to such grants are newly issued shares of Common Stock. The exercise price per share of options granted cannot be less than 100% of the fair market value of Common Stock at the date of grant under the Share Incentive Plans. Grants to date have been limited to stock awards, restricted stock, restricted stock units and options to purchase shares of Common Stock.
	Restricted stock and restricted stock units typically vest from one to five years after grant and options to purchase shares of Common Stock typically vest and become exercisable from one to five years after date of grant. Options to purchase shares of Common Stock granted under the Share Incentive Plans expire no later than the tenth anniversary of the date of grant. In the event of a participant’s death, retirement, termination by the Company without cause or a change in control of the Company, as defined in the Share Incentive Plans, restricted stock and restricted stock units vest immediately and options to purchase shares of Common Stock vest and become immediately exercisable.
	Employee Stock Purchase Plans. SEACOR’s stockholders approved the 2009 Employee Stock Purchase Plan with a term of ten years (collectively including all predecessor plans, the “Employee Stock Purchase Plans”) to permit the Company to offer Common Stock for purchase by eligible employees at a price equal to 85% of the lesser of (i) the fair market value of Common Stock on the first day of the offering period or (ii) the fair market value of Common Stock on the last day of the offering period. Common Stock is made available for purchase under the Employee Stock Purchase Plans for six-month offering periods. The Employee Stock Purchase Plans are intended to comply with Section 423 of the Internal Revenue Code of 1986, as amended (the “Code”), but is not intended to be subject to Section 401(a) of the Code or the Employee Retirement Income Security Act of 1974. The Board of Directors of SEACOR may amend or terminate the Employee Stock Purchase Plans at any time; however, no increase in the number of shares of Common Stock reserved for issuance under the Employee Stock Purchase Plans may be made without stockholder approval. A total of 600,000 shares of Common Stock have been approved for purchase under the Employee Stock Purchase Plans with all shares issued from those held in treasury.
	Share Award Transactions. The following transactions have occurred in connection with the Company’s share based compensation plans during the years ended December 31:
			2013		2012		2011
	Restricted stock awards granted		148,300		134,600		183,500
	Restricted stock awards forfeited		(18,000	)	(2,120	)	(4,100	)
	Director stock awards granted		2,500		4,000		4,000
	Restricted Stock Unit Activities:
	Outstanding as of the beginning of year		—		1,130		531
	Granted		—		—		650
	Converted to shares		—		(1,130	)	(51	)
	Outstanding as of the end of year		—		—		1,130
	Shares released from Deferred Compensation Plan		(1,692	)	—		(63	)
	Stock Option Activities:
	Outstanding as of the beginning of year		1,281,821		1,272,192		1,130,356
	Granted(1)		529,912		173,700		290,960
	Exercised		(328,077	)	(149,781	)	(146,169	)
	Forfeited		(800	)	—		(1,920	)
	Expired		(1,576	)	(14,290	)	(1,035	)
	Outstanding as of the end of year		1,481,280		1,281,821		1,272,192
	Employee Stock Purchase Plan shares issued		31,586		39,980		47,376
	Shares available for issuance under Share Incentive and Employee Stock Purchase Plans as of the end of year		508,495		1,200,417		538,287
	______________________
	-1	During the year ended December 31, 2013, the Company granted 318,012 stock options to existing option holders, net of share award settlements for Era Group employees and directors, under make-whole provisions upon the Spin-off of Era Group.
	During the years ended December 31, 2013, 2012 and 2011, the Company recognized $14.5 million, $33.3 million and $21.9 million, respectively, of compensation expense related to stock awards, stock options, employee stock purchase plan purchases, restricted stock and restricted stock units (collectively referred to as “share awards”). As of December 31, 2013, the Company had approximately $27.4 million in total unrecognized compensation costs of which $10.0 million and $8.3 million are expected to be recognized in 2014 and 2015, respectively, with the remaining balance recognized through 2018.
	The weighted average values of grants under the Company’s Share Incentive Plans were $43.74, $58.22 and $56.57 for the years ended December 31, 2013, 2012 and 2011, respectively. The fair value of each option granted during the years ended December 31, 2013, 2012 and 2011 is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions: (a) no dividend yield, (b) weighted average expected volatility of 30.5%, 31.0% and 30.7%, respectively, (c) weighted average discount rates of 1.53%, 0.81% and 1.65%, respectively, and (d) expected lives of 5.96 years, 5.91 years and 5.73 years, respectively.
	During the year ended December 31, 2013, the number of shares and the weighted average grant price of restricted stock transactions were as follows:
			Restricted Stock
			Number of		Weighted
			Shares		Average
					Grant Price
	Nonvested as of December 31, 2012		180,930		$	92.85
	Granted		148,300		$	68.23
	Vested(1)(2)		(8,860	)	$	72.79
	Forfeited		(18,000	)	$	81.78
	Nonvested as of December 31, 2013(1)		302,370		$	70.61
	______________________
	-1	During the year ended December 31, 2013, the weighted average grant prices of restricted stock outstanding at the time of the Spin-off were reduced based on a ratio of the relative market value of the Company's share price immediately prior to and after the effective date of the Spin-off.
	-2	Restricted stock vested during the year ended December 31, 2013 includes 4,940 shares transferred to Era Group as part of share award settlements for for Era Group employees and directors.
	During the years ended December 31, 2013, 2012 and 2011, the total grant date fair value of restricted stock and restricted stock units that vested was $3.7 million, $38.1 million and $1.6 million, respectively. During the year ended December 31, 2013, the Company recognized additional compensation expense of $3.3 million as a consequence of a partial acceleration of the vesting of restricted stock upon the Company's restricted stockholders receiving one fully vested Era share for each SEACOR restricted share held on the effective date of the Spin-off by means of a dividend. During the year ended December 31, 2012, the Company accelerated the vesting date for all restricted stock and restricted stock units that were scheduled to vest in 2013 and 2014 into 2012 resulting in additional compensation expense of $12.2 million, including discontinued operations.
	During the year ended December 31, 2013, the number of shares, the weighted average grant date fair value and the weighted average exercise price on stock option transactions were as follows:
			Nonvested Options					Vested/Exercisable Options				Total Options
			Number of		Weighted			Number of		Weighted		Number of		Weighted
			Shares		Average			Shares		Average		Shares		Average
					Grant Date					Exercise Price				Exercise Price
					Fair Value
	Outstanding, as of		533,660		$	27.72		748,161		$	63.36	1,281,821		$	68.96
	31-Dec-12
	Granted(1)(2)		354,254		$	26.12		175,658		$	45.64	529,912		$	63.19
	Vested(1)		(235,508	)	$	21.61		235,508		$	56.62	—		$	—
	Exercised(1)		—		$	—		(328,077	)	$	51.17	(328,077	)	$	51.17
	Forfeited(1)		(800	)	$	23.22		—		$	—	(800	)	$	72.84
	Expired(1)		—		$	—		(1,576	)	$	72.04	(1,576	)	$	72.04
	Outstanding, as of		651,606		$	23.36		829,674		$	50.42	1,481,280		$	57.95
	December 31, 2013(1)
	______________________
	-1	During the year ended December 31, 2013, the weighted average grant date fair values and weighted average exercise prices of stock options outstanding at the time of the Spin-off were reduced based on a ratio of the relative market value of the Company's share price immediately prior to and after the effective date of the Spin-off.
	-2	During the year ended December 31, 2013, the Company granted 142,354 nonvested and 175,658 vested/exercisable stock options to existing option holders, net of share award settlements for Era Group employees and directors, under make-whole provisions upon the Spin-off of Era Group.
	During the years ended December 31, 2013, 2012 and 2011, the aggregate intrinsic value of exercised stock options was $10.5 million, $7.0 million and $6.8 million, respectively. As of December 31, 2013, the weighted average remaining contractual term for total outstanding stock options and vested/exercisable stock options was 5.97 and 4.53 years, respectively. As of December 31, 2013, the aggregate intrinsic value of all options outstanding and all vested/exercisable options outstanding was $49.3 million and $33.8 million, respectively.
	As a result of the Spin-off during the year ended December 31, 2013, the Company reduced the exercise prices for all outstanding stock options and granted additional stock options to existing option holders based on a ratio of the relative market value of its share price immediately prior to and after the effective date of the Spin-off. As a result of these adjustments, both the aggregate intrinsic value and the ratio of the exercise price to the market price were approximately equal immediately prior to and after the effective date of the Spin-off. As these adjustments were made in accordance with the anti-dilution provisions of the Share Incentive Plans, no compensation expense was recognized for the adjustments.
	As a result of the Special Cash Dividend (see Note 10) paid during the year ended December 31, 2012, the Company reduced the exercise prices for all outstanding stock options as of the Special Cash Dividend record date by the dividend amount of $5.00. As a result of this adjustment, both the aggregate intrinsic value and the ratio of the exercise price to the market price were approximately equal immediately prior to and after the Special Cash Dividend record date. As this adjustment was made in accordance with the anti-dilution provisions of the Share Incentive Plans, no compensation expense was recognized for the adjustments.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	13	RELATED PARTY TRANSACTIONS
	The Company manages barge pools as part of its Inland River Services segment. Pursuant to the pooling agreements, operating revenues and expenses of participating barges are combined and the net results are allocated on a pro-rata basis based on the number of barge days contributed by each participant. Mr. Charles Fabrikant, the Executive Chairman of SEACOR, companies controlled by Mr. Fabrikant, and trusts for the benefit of Mr. Fabrikant’s children, own barges that participate in the barge pools managed by the Company. Mr. Fabrikant and his affiliates were participants in the barge pools prior to the acquisition of SCF Marine Inc. by SEACOR in 2000. In the years ended December 31, 2013, 2012 and 2011, Mr. Fabrikant and his affiliates earned $0.9 million, $0.8 million and $1.1 million, respectively, of net barge pool results (after payment of $0.2 million, $0.1 million and $0.1 million, respectively, in management fees to the Company). As of December 31, 2013 and 2012, the Company owed Mr. Fabrikant and his affiliates $0.6 million and $0.4 million, respectively, for undistributed net barge pool results. Mr. Fabrikant and his affiliates participate in the barge pools on the same terms and conditions as other pool participants who are unrelated to the Company.
	ICP manufactures and sells certain non-ethanol alcohol finished goods to the noncontrolling interest partner in ICP. During the year ended December 31, 2012, the noncontrolling interest partner operated under a marketing agreement with ICP for non-ethanol alcohol production, which expired on January 1, 2013. During the year ended December 31, 2013, ICP continued to sell non-ethanol alcohol finished goods to the noncontrolling interest partner for resale purposes and also independently sold non-ethanol alcohol finished goods directly to unrelated third party customers. During the years ended December 31, 2013 and 2012, the Company sold $6.6 million and $44.8 million, respectively to the noncontrolling interest partner. As of December 31, 2013 and 2012, ICP had accounts receivable of $1.8 million and $4.7 million from the noncontrolling interest partner. The noncontrolling interest partner has payment terms comparable to other ICP customers purchasing the same types of non-ethanol alcohol finished goods.
	Mr. Fabrikant is also a director of Diamond Offshore Drilling, Inc. (“Diamond”), which is also a customer of the Company. The total amount earned from business conducted with Diamond did not exceed $5.0 million in any of the years ended December 31, 2013, 2012 and 2011.
	Mr. Fabrikant and Mr. Lorentzen are also directors of Era Group, which is also customer of the Company. Furthermore, following the Spin-Off the Company has provided certain transition services to Era Group. The total amount earned from business conducted with Era, including transition services provided, did not exceed $5.0 million during the year ended December 31, 2013.

Commitments_And_Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	14	COMMITMENTS AND CONTINGENCIES
	As of December 31, 2013, the Company's unfunded capital commitments were $547.0 million and included: 16 offshore support vessels for $112.7 million; 80 inland river dry cargo barges for $40.2 million; six inland river tank barges for $4.7 million; five inland river towboats for $4.7 million; three U.S.-flag product tankers for $374.1 million; and other equipment and improvements for $10.6 million. Of these commitments, $304.9 million is payable during 2014; $232.8 million is payable during 2015-2016 and $9.3 million is payable in 2017. Subsequent to December 31, 2013, the Company committed to purchase one U.S.-flag articulated tug-barge and additional equipment for $94.1 million. As of December 31, 2013, the Company held balances of cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds totaling $825.6 million.
	On July 20, 2010, two individuals purporting to represent a class commenced a civil action in the Civil District Court for the Parish of Orleans in the State of Louisiana, John Wunstell, Jr. and Kelly Blanchard v. BP, et al., No. 2010-7437 (Division K) (the “Wunstell Action”), in which they assert, among other theories, that Mr. Wunstell suffered injuries as a result of his exposure to certain noxious fumes and chemicals in connection with the provision of remediation, containment and response services by ORM, a subsidiary of the Company prior to the ORM Transaction, 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, ORM and NRC, subsidiaries of the Company prior to the ORM Transaction and SES Business Transaction (see Note 1), respectively, were named as defendants in one of the several consolidated “master complaints” that have been filed in the overall MDL. The 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. 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 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. Transcoean's limitation, 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 la., 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. Following briefing and remand to the MDL court concerning a specific issue, the Medical Settlement appellants moved to voluntarily dismiss their appeals, which the Fifth Circuit granted on December 4, 2013. The Fifth Circuit affirmed the MDL Court's decision concerning the E&P Settlement on January 10, 2014. 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 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 claims that ORM owes HEPACO an additional fee of $20,291,178.92 under the parties' Management Services Agreement (“MSA”), dated June 1, 2010.  According to HEPACO, the MSA requires 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. ORM denies liability for the Surcharge, intends to vigorously defend against the claim, and has sought indemnity for any resulting judgment and related attorneys' fees from BP America and BP Exploration. ORM has advised BP that, pursuant to the Bridge Agreement HOU-WL4-3066 between BP and ORM, effective as of June 1, 2010, under which ORM managed and oversaw, for BP, subcontractors, such as HEPACO, in connection with on-shore services related to the BP Deepwater Horizon oil spill, BP ultimately is responsible for the payment of the Surcharge should HEPACO be determined to be entitled to recover it under the MSA.
	ORM is defending against three 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”); 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”); 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, Himmerite and Singleton 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 and Singleton Actions were stayed pursuant to procedures of the MDL.  However, all three cases 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 both the Himmerite and Singleton Actions.  In the Himmerite and Singleton Actions, pursuant to an earlier tolling order entered by the Court, the limitations periods for potential plaintiffs to opt-in to those actions have 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. Pursuant to the schedule entered by the Court, potential class members have until February 28, 2014 to opt into the class by submitting consent forms to their attorneys. Plaintiffs’ counsel has until March 10, 2014 to file all executed consent forms with the Court. 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. On February 11, 2014, the parties in the Singleton Action reached a full and final settlement agreement with respect to all of the Plaintiff’s individual claims, which is pending final execution by certain parties.  Once executed, the settlement agreement will be filed with the Court for approval. The Company is unable to estimate the potential exposure, if any, resulting from any of these DPH FLSA Actions, but believes they are without merit and will continue to vigorously defend against them.
	In the course of the Company's business, it may agree to indemnify a party. 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 and the ORM 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. In the case of the SES Business Transaction, such potential liabilities may not exceed the purchase consideration received by the Company for the SES Business Transaction and in the case of the ORM Transaction are subject to a negotiated cap. The Company currently is indemnified under contractual agreements with BP.
	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.
	As of December 31, 2013, the Company leases 22 offshore support vessels, ten barges, two tankers, nine azimuth drive harbor tugs and certain facilities and other equipment. These leasing agreements have been classified as operating leases for financial reporting purposes and related rental fees are charged to expense over the lease terms. The leases generally contain purchase and lease renewal options or rights of first refusal with respect to the sale or lease of the equipment. The remaining lease terms of the tankers, which are subject to subleases, have durations of 105 and 121 months. The lease terms of the other equipment range in duration from one to seven years. Certain of the equipment leases are the result of sale-leaseback transactions with finance companies (see Note 4) and certain of the gains arising from such sale-leaseback transactions have been deferred in the accompanying consolidated balance sheets and are being amortized as reductions in rental expense over the lease terms (see Note 1).
	Total rental expense for the Company’s operating leases in 2013, 2012 and 2011 was $70.9 million, $57.9 million and $44.2 million, respectively. Future minimum payments in the years ended December 31 under operating leases that have a remaining term in excess of one year as of December 31, 2013 for the Company, were as follows (in thousands):
			Total  Minimum		Non-cancellable			Net Minimum
			Payments		Subleases(1)			Payments
	2014		$	43,940	$	(17,345	)	$	26,595
	2015		41,282		(17,345		)	23,937
	2016		36,888		(17,392		)	19,496
	2017		34,933		(17,345		)	17,588
	2018		33,743		(17,345		)	16,398
	Years subsequent to 2018		102,920		(76,127		)	26,793
	______________________
	-1	The total minimum offsetting payments to be received under existing long-term bareboat charter-out arrangements.

Major_Customers_And_Segment_In

Major Customers And Segment Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Major Customers And Segment Information	'
	15	MAJOR CUSTOMERS AND SEGMENT INFORMATION
	Certain reclassifications of prior year information have been made to conform to the current year's reportable segment presentation as a result of the Company's presentation of discontinued operations (see Note 16). The following tables summarize the operating results, capital expenditures and assets of the Company’s reportable segments.
			Offshore		Inland			Shipping			ICP(1)(2) $’000		Other		Corporate		Total
			Marine		River			Services					$’000		and		$’000
			Services		Services			$’000							Eliminations
			$’000		$’000										$’000
	For the year ended December 31, 2013
	Operating Revenues:
	External customers		567,148		212,726			194,184			193,682		79,532		—		1,247,272
	Intersegment		115		2,887			—			—		—		(3,002	)	—
			567,263		215,613			194,184			193,682		79,532		(3,002	)	1,247,272
	Costs and Expenses:
	Operating		382,045		152,527			117,283			184,649		75,254		(2,887	)	908,871
	Administrative and general		60,279		15,410			22,073			2,031		6,296		35,259		141,348
	Depreciation and amortization		65,424		28,461			31,299			5,797		378		3,159		134,518
			507,748		196,398			170,655			192,477		81,928		35,531		1,184,737
	Gains on Asset Dispositions and Impairments, Net		28,664		6,555			240			—		1,907		141		37,507
	Operating Income (Loss)		88,179		25,770			23,769			1,205		(489	)	(38,392	)	100,042
	Other Income (Expense):
	Derivative gains (losses), net		83		—			—			(2,078	)	210		(6,538	)	(8,323	)
	Foreign currency losses, net		(2,209	)	(167	)		(14	)		—		(342	)	(619	)	(3,351	)
	Other, net		3		—			760			—		12		(189	)	586
	Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		13,522		(7,626	)		(2,945	)		—		4,313		—		7,264
	Segment Profit (Loss)		99,578		17,977			21,570			(873	)	3,704
	Other Income (Expense) not included in Segment Profit																(21,322	)
	Less Equity Earnings included in Segment Profit																(7,264	)
	Income Before Taxes, Equity Earnings and Discontinued Operations																67,632
	Capital Expenditures of Continuing Operations		111,517		37,360			43,713			1,115		385		1,811		195,901
	As of December 31, 2013
	Property and Equipment:
	Historical cost		1,139,639		481,421			498,951			44,166		3,967		31,039		2,199,183
	Accumulated depreciation		(471,590	)	(147,698	)		(223,667	)		(11,390	)	(662	)	(11,323	)	(866,330	)
			668,049		333,723			275,284			32,776		3,305		19,716		1,332,853
	Construction in progress		102,452		28,855			11,324			738		113		—		143,482
			770,501		362,578			286,608			33,514		3,418		19,716		1,476,335
	Investments, at Equity, and Advances to 50% or Less Owned Companies		99,160		55,411			197,145			—		89,137		—		440,853
	Inventories		6,315		2,279			1,329			16,172		1,520		—		27,615
	Goodwill		13,367		2,766			1,852			—		—		—		17,985
	Intangible Assets		3,650		7,568			859			7		339		—		12,423
	Other current and long-term assets, excluding cash and near cash assets(3)		149,239		69,267			15,097			5,409		47,584		28,785		315,381
	Segment Assets		1,042,232		499,869			502,890			55,102		141,998
	Cash and near cash assets(3)																825,641
	Total Assets																3,116,233
	______________________
	-1	Operating revenues includes $189.5 million of tangible product sales and operating expenses includes $180.5 million of costs of goods sold.
	-2	Inventories include raw materials of $1.8 million and work in process of $1.8 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(1)(2) $’000		Other		Corporate		Total
			Marine		River			Services					$’000		and		$’000
			Services		Services			$’000							Eliminations
			$’000		$’000										$’000
	For the year ended December 31, 2012
	Operating Revenues:
	External customers		519,707		224,409			179,928			188,650		195,603		—		1,308,297
	Intersegment		110		2,152			108			—		128		(2,498	)	—
			519,817		226,561			180,036			188,650		195,731		(2,498	)	1,308,297
	Costs and Expenses:
	Operating		349,680		158,596			112,125			183,442		175,957		(2,331	)	977,469
	Administrative and general		59,253		15,924			22,553			1,920		23,824		43,269		166,743
	Depreciation and amortization		61,542		28,270			30,635			5,757		2,874		2,589		131,667
			470,475		202,790			165,313			191,119		202,655		43,527		1,275,879
	Gains (Losses) on Asset Dispositions and Impairments, Net		14,876		7,666			3,128			—		(1,527	)	(156	)	23,987
	Operating Income (Loss)		64,218		31,437			17,851			(2,469	)	(8,451	)	(46,181	)	56,405
Other Income (Expense):
Derivative gains (losses), net		(243	)	—			—			(856	)	910		(2,623	)	(2,812	)
Foreign currency gains, net		1,077		84			6			—		2		462		1,631
Other, net		2		(1	)		7,452			—		—		(305	)	7,148
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		5,214		(3,310	)		(4,148	)		6,154		(9,674	)	—		(5,764	)
Segment Profit (Loss)		70,268		28,210			21,161			2,829		(17,213	)
Other Income (Expense) not included in Segment Profit																(7,800	)
Less Equity Losses included in Segment Profit																5,764
Income Before Taxes, Equity Earnings and Discontinued Operations																54,572
Capital Expenditures of Continuing Operations		168,778		28,818			31,235			96		6,576		3,847		239,350
As of December 31, 2012
Property and Equipment:
Historical cost		1,158,169		491,653			506,054			43,789		8,276		30,442		2,238,383
Accumulated depreciation		(422,564	)	(127,112	)		(198,943	)		(5,679	)	(398	)	(9,107	)	(763,803	)
		735,605		364,541			307,111			38,110		7,878		21,335		1,474,580
Construction in progress		66,088		11,122			29,972			—		3,040		74		110,296
Property and Equipment		801,693		375,663			337,083			38,110		10,918		21,409		1,584,876
Investments, at Equity, and Advances to 50% or Less Owned Companies		66,805		53,844			67,023			—		84,863		—		272,535
Inventories		6,779		2,623			1,728			11,770		2,887		—		25,787
Goodwill		13,367		2,759			1,852			—		—		—		17,978
Intangible Assets		4,086		9,214			1,410			93		502		—		15,305
Other current and long-term assets, excluding cash and near cash assets(3)		139,757		75,661			14,183			6,533		72,123		33,393		341,650
Segment Assets		1,032,487		519,764			423,279			56,506		171,293
Cash and near cash assets(3)																493,786
Discontinued operations																948,877
Total Assets																3,700,794
______________________
-1	Operating revenues includes $184.9 million of tangible product sales and operating expenses includes $185.1 million of costs of goods sold.
-2	Inventories include raw materials of $2.4 million and work in process of $1.8 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 year ended December 31, 2011
Operating Revenues:
External customers		376,692		187,657			161,307			—		306,841		—		1,032,497
Intersegment		96		—			—			—		26		(122	)	—
		376,788		187,657			161,307			—		306,867		(122	)	1,032,497
Costs and Expenses:
Operating		269,203		119,499			90,708			—		266,168		(25	)	745,553
Administrative and general		47,201		11,339			18,301			256		19,370		35,305		131,772
Depreciation and amortization		48,477		23,494			30,214			—		2,830		1,858		106,873
		364,881		154,332			139,223			256		288,368		37,138		984,198
Gains (Losses) on Asset Dispositions and Impairments, Net		14,661		2,964			1,355			—		3		(144	)	18,839
Operating Income (Loss)		26,568		36,289			23,439			(256	)	18,502		(37,404	)	67,138
Other Income (Expense):
Derivative losses, net		—		—			—			—		(980	)	(29,075	)	(30,055	)
Foreign currency gains (losses), net		(3,102	)	—			(30	)		—		277		3,395		540
Other, net		278		4			307			—		950		(521	)	1,018
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		9,189		4,136			(74	)		(1,815	)	(1,528	)	—		9,908
Segment Profit (Loss)		32,933		40,429			23,642			(2,071	)	17,221
Other Income (Expense) not included in Segment Profit																(34,872	)
Less Equity Earnings included in Segment Profit																(9,908	)
Income Before Taxes, Equity Earnings and Discontinued Operations																3,769
Capital Expenditures of Continuing Operations		88,248		44,693			24,308			—		4,972		3,043		165,264
As of December 31, 2011
Property and Equipment
Historical cost		943,108		474,618			524,398			—		18,610		25,997		1,986,731
Accumulated depreciation		(372,213	)	(104,768	)		(175,978	)		—		(3,002	)	(9,592	)	(665,553	)
		570,895		369,850			348,420			—		15,608		16,405		1,321,178
Construction in progress		83,924		13,442			18,055			—		314		3,744		119,479
		654,819		383,292			366,475			—		15,922		20,149		1,440,657
Investments, at Equity, and Advances to 50% or Less Owned Companies		68,330		50,183			12,284			11,790		56,903		—		199,490
Inventories		6,449		2,422			1,671			—		2,416		—		12,958
Goodwill		13,367		4,345			1,852			—		37,138		—		56,702
Intangible Assets		5,971		7,324			1,945			—		6,288		—		21,528
Other current and long-term assets, excluding cash and near cash assets(1)		125,472		72,565			14,131			8		137,008		29,014		378,198
Segment Assets		874,408		520,131			398,358			11,798		255,675
Cash and near cash assets(1)																729,635
Discontinued operations																1,088,966
Total Assets																3,928,134
______________________
-1	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.
In the years ended December 31, 2013, 2012 and 2011, the Company did not earn revenues that were greater than or equal to 10% of total revenues from a single customer. For the years ended December 31, 2013, 2012 and 2011, approximately 32%, 37% and 50%, respectively, of the Company’s operating revenues were derived from its foreign operations. The Company’s foreign revenues are primarily derived from its Offshore Marine Services fleet and certain of its Inland River and Shipping Services fleets. These assets are highly mobile and regularly and routinely move between countries within a geographical region of the world. In addition, these assets may be redeployed among the geographical regions as changes in market conditions dictate. Because of this asset mobility, revenues and long-lived assets, primarily property and equipment, in any one country are not considered material. The following represents the Company’s revenues attributed by geographical region in which services are provided to customers for the years ended December 31 (in thousands):
		2013			2012				2011
Operating Revenues:
United States		$	845,056		$	823,693			$	517,120
Africa, primarily West Africa		79,991			75,484				75,497
Europe, primarily North Sea		101,834			107,766				79,210
Asia		26,203			21,039				15,973
Middle East		51,930			49,941				46,724
Brazil, Mexico, Central and South America		142,258			229,986				297,536
Other		—			388				437
		$	1,247,272		$	1,308,297			$	1,032,497
The Company’s long-lived assets are primarily its property and equipment that are employed in various geographical regions of the world. The following represents the Company’s property and equipment based upon the assets’ physical location as of December 31 (in thousands):
		2013			2012				2011
Property and Equipment:
United States		$	1,094,370		$	1,158,038			$	986,404
Africa, primarily West Africa		73,137			77,860				89,166
Europe, primarily North Sea		93,713			97,631				96,716
Asia		21,485			25,305				25,542
Middle East		61,134			99,863				70,431
Brazil, Mexico, Central and South America		132,496			126,179				172,398
		$	1,476,335		$	1,584,876			$	1,440,657

Discountinued_Operations_Disco

Discountinued Operations Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations [Abstract]	'
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	'
	16	DISCONTINUED OPERATIONS
	On March 16, 2012, SEACOR completed the SES Business Transaction for a net sales price of $99.9 million and recognized a gain of $18.6 million, net of tax, or $0.90 per diluted share. During the year ended December 31, 2013, the final working capital settlements were completed resulting in a $1.0 million reduction of the gain, net of tax. The SES Business included NRC, one of the largest providers of oil spill response services in the United States; NRC Environmental Services Inc., a leading provider of environmental and industrial services on the West Coast of the United States; SEACOR Response Ltd., which provides oil spill response and emergency response services to customers in international markets; and certain other subsidiaries. As a result of the sale, the Company disposed of $8.0 million of goodwill.
	On December 31, 2012, SEACOR sold SEI, the Company's energy commodity and logistics business, to Par Petroleum Corporation for a net sales price of $15.1 million and recognized a gain of $7.1 million, net of tax, or $0.34 per diluted share. During the year ended December 31, 2013, the final working capital settlements were completed resulting in a $0.1 million reduction of the gain, net of tax.
	On January 31, 2013, the Company completed the Spin-off of Era Group, the company that operated SEACOR's Aviation Services business segment, by means of a dividend to SEACOR's shareholders of all the issued and outstanding common stock of Era Group. Era Group filed a Registration Statement on Form 10 with the SEC, describing the Spin-off, that was declared effective on January 14, 2013. Prior to the Spin-off, SEACOR and Era Group entered into a Distribution Agreement and several other agreements that will govern the post-Spin-off relationship. Era Group is now an independent company whose common stock is listed on the New York Stock Exchange under the symbol "ERA." During the year ended December 31, 2013, the Company made a determination to provide for income taxes of $10.1 million relating to the spin-off of Era Group effective as of January 31, 2013, the date of the spin-off.
	For all periods presented herein, the Company has reported the historical financial position, results of operations and cash flows of the SES Business, SEI and Era Group as discontinued operations. Summarized selected operating results of the discontinued operations for the years ended December 31 were as follows (in thousands):
			2013			2012			2011
	SES Business
	Operating Revenues		$	—		$	22,387		$	131,346
	Costs and Expenses:
	Operating		—			18,234			90,267
	Administrative and general		—			4,624			20,674
	Depreciation and amortization		—			1,428			7,332
			—			24,286			118,273
	Losses on Asset Dispositions		—			(71		)	(61		)
	Operating Income (Loss)		—			(1,970		)	13,012
	Other Income (Expense), Net (including gain on sale of business)		(1,537		)	24,971			203
	Income Tax (Expense), Net		538			(6,342		)	(5,659		)
	Equity in Earnings (Losses) of 50% or Less Owned Companies		—			301			(49		)
	Net Income (Loss)		$	(999	)	$	16,960		$	7,507
	SEI
	Operating Revenues		$	—		$	515,468		$	731,164
	Costs and Expenses:
	Operating		—			503,294			720,791
	Administrative and general		—			5,579			3,290
	Depreciation and amortization		—			(3		)	7
			—			508,870			724,088
	Operating Income		—			6,598			7,076
	Other Income (Expense), Net (including gain on sale of business)		(143		)	8,083			(5,335		)
	Income Tax (Expense), Net		50			(4,856		)	(913		)
	Net Income (Loss)		$	(93	)	$	9,825		$	828
	Era Group
	Operating Revenues		$	22,892		$	272,921		$	258,148
	Costs and Expenses:
	Operating		14,076			167,195			162,707
	Administrative and general		2,653			34,785			31,893
	Depreciation and amortization		3,875			42,502			42,612
			20,604			244,482			237,212
	Gains on Asset Dispositions		548			3,612			15,172
	Operating Income		2,836			32,051			36,108
	Other Income (Expense), Net		(1,316		)	(9,478		)	(1,439		)
	Income Tax (Expense), Net		(10,818		)	(7,998		)	(11,303		)
	Equity in Earnings (Losses) of 50% or Less Owned Companies		65			(5,528		)	82
	Net Income		$	(9,233	)	$	9,047		$	23,448
	Eliminations
	Operating Revenues		$	—		$	(109,941	)	$	(11,213	)
	Costs and Expenses:
	Operating		—			(109,938		)	(11,131		)
	Administrative and general		—			(3		)	(82		)
			—			(109,941		)	(11,213		)
	Operating Income		$	—		$	—		$	—

Supplemental_Information_For_S

Supplemental Information For Statements Of Cash Flows	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Supplemental Information For Statements Of Cash Flows	'
	17	SUPPLEMENTAL INFORMATION FOR STATEMENTS OF CASH FLOWS
	Supplemental information for the years ended December 31 was as follows (in thousands):
			2013		2012		2011
	Income taxes paid		$	4,285	$	24,378	$	8,398
	Income taxes refunded		2,739		11,317		2,499
	Interest paid, excluding capitalized interest		32,388		46,457		39,559
	Schedule of Non-Cash Investing and Financing Activities:
	Distribution of Era Group stock to shareholders		415,209		—		—
	Marketable securities reclassified to investment in Trailer Bridge		—		48,064		—
	(see Note 5)
	Company financed sale of vessels		10,263		48,848		11,889
	Contribution of assets to 50% or less owned companies		—		15,123		12,361
	Issuance of Common Stock on Windcat Acquisition (See Note 4)		—		585		—
	Contribution of assets from noncontrolling interests		—		—		124

Quarterly_Financial_Informatio

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly Financial Information	'
	18	QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
	Selected financial information for interim quarterly periods is presented below (in thousands, except share data). Earnings per common share of SEACOR Holdings Inc. are computed independently for each of the quarters presented and the sum of the quarterly earnings per share may not necessarily equal the total for the year.
			Three Months Ended
			Dec. 31,			Sept. 30,		June 30,			March 31,			March 31,
	2013										(As Restated)(1)			(As Reported)(1)
	Operating Revenues		$	327,861		$	336,784	$	315,563		$	267,064		$	267,064
	Operating Income		30,307			51,508		19,254			(1,027		)	(1,027		)
	Income (Loss) from Continuing Operations		9,120			30,769		19,296			(11,036		)	(11,036		)
	Loss from Discontinued Operations, Net of Tax		—			—		—			(10,325		)	(211		)
	Net Income (Loss)		9,120			30,769		19,296			(21,361		)	(10,874		)
	Net Income (Loss) attributable to SEACOR Holdings Inc.:
	Continuing Operations		$	8,396		$	30,291	$	19,271		$	(10,763	)	$	(10,763	)
	Discontinued Operations		—			—		—			(10,225		)	(111		)
			$	8,396		$	30,291	$	19,271		$	(20,988	)	$	(10,874	)
	Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations		$	0.42		$	1.52	$	0.97		$	(0.55	)	$	(0.55	)
	Discontinued Operations		—			—		—			(0.51		)	—
			$	0.42		$	1.52	$	0.97		$	(1.06	)	$	(0.55	)
	Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations		$	0.41		$	1.36	$	0.91		$	(0.55	)	$	(0.55	)
	Discontinued Operations		—			—		—			(0.51		)	—
			$	0.41		$	1.36	$	0.91		$	(1.06	)	$	(0.55	)
			Three Months Ended
			Dec. 31,			Sept. 30,		June 30,			March 31,
	2012
	Operating Revenues		$	362,368		$	338,855	$	309,225		$	297,849
	Operating Income (Loss)		9,332			20,058		(1,499		)	28,514
	Income (Loss) from Continuing Operations		(12,295		)	9,239		6,495			21,188
	Income from Discontinued Operations, Net of Tax		9,578			6,265		4,804			15,185
	Net Income (Loss)		(2,717		)	15,504		11,299			36,373
	Net Income (Loss) attributable to SEACOR Holdings Inc.:
	Continuing Operations		$	(12,242	)	$	9,837	$	6,445		$	21,303
	Discontinued Operations		9,618			6,265		4,804			15,185
			$	(2,624	)	$	16,102	$	11,249		$	36,488
	Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations		$	(0.61	)	$	0.48	$	0.31		$	1.04
	Discontinued Operations		0.48			0.31		0.24			0.74
			$	(0.13	)	$	0.79	$	0.55		$	1.78
	Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations		$	(0.61	)	$	0.47	$	0.31		$	1.02
	Discontinued Operations		0.48			0.31		0.23			0.73
			$	(0.13	)	$	0.78	$	0.54		$	1.75
	______________________
	-1	During the fourth quarter of 2013, the Company made a determination to provide for income taxes of $10.1 million relating to the spin-off of Era Group effective as of January 31, 2013, the date of the spin-off. As a result, the Company has restated its results from discontinued operations for the quarter ended March 31, 2013 in the table included herein. For the quarter ended March 31, 2013, the Company now reports a net loss of $21.0 million, or $1.06 per diluted share, compared with a previously reported net loss of $10.9 million, or $0.55 per diluted share, and now reports a net loss from discontinued operations of $10.2 million, or $0.51 per diluted share, compared with a previously reported net loss from discontinued operations of $0.1 million. Net loss from continuing operations of $10.8 million, or $0.55 per diluted share, remains as previously reported.

Valuation_And_Qualifying_Accou

Valuation And Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Valuation And Qualifying Accounts	'
	SEACOR HOLDINGS INC.
	SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS
	For the Years Ended December 31, 2013, 2012 and 2011
	(in thousands)
	Description		Balance		Charges			Deductions(1)			Other(2)		Balance
			Beginning		(Credits)								End
			of Year		to Cost and								of Year
					Expenses
	Year Ended December 31, 2013
	Allowance for doubtful accounts (deducted from trade and notes receivable)		$	1,201	$	170		$	(209	)	$	—	$	1,162
	Inventory allowance (deducted from inventory)		$	1,327	$	(406	)	$	—		$	—	$	921
	Year Ended December 31, 2012
	Allowance for doubtful accounts (deducted from trade and notes receivable)		$	2,355	$	1,311		$	(2,736	)	$	271	$	1,201
	Inventory allowance (deducted from inventory)		$	—	$	971		$	—		$	356	$	1,327
	Year Ended December 31, 2011
	Allowance for doubtful accounts (deducted from trade and notes receivable)		$	4,196	$	(56	)	$	(1,785	)	$	—	$	2,355
	______________________
	-1	Trade receivable amounts deemed uncollectible that were removed from accounts receivable and allowance for doubtful accounts.
	-2	Valuation allowances of ICP at the time of initial consolidation.

Nature_Of_Operations_And_Accou1

Nature Of Operations And Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2013
Nature Of Operations And Accounting Policies [Abstract]	'
Nature Of Operations and Segmentation	'
	Nature of Operations and Segmentation. SEACOR Holdings Inc. (“SEACOR”) and its subsidiaries (collectively referred to as the “Company”) are in the business of owning, operating, investing in and marketing equipment, primarily in the offshore oil and gas, shipping and logistics industries. 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 a component 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 has identified the following reporting segments:
	Offshore Marine Services. Offshore Marine Services operates a diverse fleet of support vessels primarily servicing offshore oil and gas exploration, development and production facilities worldwide. The vessels deliver cargo and personnel to offshore installations; handle anchors and mooring equipment required to tether rigs to the seabed; tow rigs and assist in placing them on location and moving them between regions; and carry and launch equipment such as remote operated vehicles or “ROVs” used underwater in drilling, well-completion and emergencies. In addition to supporting drilling activities, Offshore Marine Services' vessels support offshore construction and maintenance work, provide accommodations for technicians and specialists, and provide standby safety support and emergency response services. Offshore Marine Services also operates a fleet of lift boats in the U.S. Gulf of Mexico supporting well intervention, work-over, decommissioning and diving operations and has a controlling interest in a business that owns and operates vessels primarily used to move personnel and supplies to offshore wind farms. In addition, Offshore Marine Services offers logistics services in support of offshore oil and gas exploration, development and production operations, including shore bases, marine transport and other supply chain management services.  Offshore Marine Services contributed 45%, 40% and 36% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Inland River Services. Inland River Services owns, operates, invests in and markets river transportation equipment primarily used for moving agricultural and industrial commodities, and chemical and petrochemical products, on the U.S. Inland River Waterways, primarily the Mississippi River, Illinois River, Tennessee River, Ohio River and their tributaries, and the Gulf Intracoastal Waterways. Internationally, Inland River Services has operations on the Magdalena River in Colombia and noncontrolling interests in operations on the Parana-Paraguay River Waterways and in a transshipment terminal at the Port of Ibicuy, Argentina. In addition to its primary barge business, Inland River Services also owns, operates and invests in high-speed multi-modal terminal facilities for both dry and liquid commodities and provides a broad range of services including machine shop, gear and engine repairs, and the repair and drydocking of barges and towboats at strategic locations on the U.S. Inland River Waterways. Inland River Services contributed 17%, 17% and 18% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Shipping Services. Shipping Services invests in, operates and leases a diversified fleet of U.S.-flag and foreign-flag marine transportation related assets, including deep-sea cargo vessels primarily servicing the U.S. coastwise petroleum trade, harbor tugs servicing vessels docking in the U.S. Gulf and East Coast ports and foreign-flag Very Large Gas Carriers ("VLGC's") through its noncontrolling investment in Dorian LPG. Additional assets and services include liner and short-sea transportation to and from ports in Florida, Puerto Rico, the Bahamas and Western Caribbean, a terminal support and bunkering operation in St. Eustatius, a U.S.-flag articulated tug and dry-bulk barge operating on the Great Lakes and technical ship management services. Shipping Services contributed 16%, 14% and 16% of consolidated operating revenues in 2013, 2012 and 2011, respectively.
	Illinois Corn Processing. Illinois Corn Processing LLC ("ICP") operates an alcohol manufacturing, storage and distribution facility located in Pekin, IL. A flexible production platform and infrastructure enables ICP to produce, store, and distribute a variety of high quality alcohol used in the food, beverage, industrial, and petrochemical end-markets as well as fuel grade ethanol. The capability to produce these specialized streams differentiates ICP from other fuel ethanol plants and positions it as a key supply partner to a broad customer base. The Company obtained a controlling interest in ICP on February 1, 2012 through the acquisition of a portion of its partner's interest. ICP contributed 16% and 14% of consolidated operating revenues in 2013 and 2012, respectively.
	Other. The Company also has activities that are referred to and described under Other, which primarily include a noncontrolling investment in emergency and crisis services activities, agricultural commodity trading and logistics activities, lending and leasing activities and noncontrolling interests in various other businesses, primarily industrial aviation services businesses in Asia.
Discontinued Operations	'
	Discontinued Operations (see Note 16). The Company reports the historical financial position, results of operations and cash flows of disposed businesses as discontinued operations when it has no continuing interest in the business. On March 16, 2012, the Company sold National Response Corporation ("NRC"), NRC Environmental Services Inc., SEACOR Response Ltd., and certain other subsidiaries (collectively the “SES Business”) to J.F. Lehman & Company, a leading, middle-market private equity firm (the "SES Business Transaction"). On December 31, 2012, the Company sold SEACOR Energy Inc. ("SEI") to Par Petroleum Corporation. On January 31, 2013, the Company completed the spin-off ("Spin-off") of Era Group Inc. (“Era Group”)by means of a dividend to SEACOR's shareholders of all the issued and outstanding common stock of Era Group.
Basis Of Consolidation	'
	Basis of Consolidation. The consolidated financial statements include the accounts of SEACOR and its controlled subsidiaries. Control is generally deemed to exist if the Company has greater than 50% of the voting rights of a subsidiary. All significant intercompany accounts and transactions are eliminated in consolidation.
	Noncontrolling interests in consolidated subsidiaries are included in the consolidated balance sheets as a separate component of equity. The Company reports consolidated net income inclusive of both the Company’s and the noncontrolling interests’ share, as well as the amounts of consolidated net income attributable to each of the Company and the noncontrolling interests. If a subsidiary is deconsolidated upon a change in control, any retained noncontrolled equity investment in the former controlled subsidiary is measured at fair value and a gain or loss is recognized in net income based on such fair value. If a subsidiary is consolidated upon a change in control, any previous noncontrolled equity investment in the subsidiary is measured at fair value and a gain or loss is recognized based on such fair value.
	The Company employs the equity method of accounting for investments in 50% or less owned companies that it does not control but has the ability to exercise significant influence over the operating and financial policies of the business venture. Significant influence is generally deemed to exist if the Company has between 20% and 50% of the voting rights of a business venture. In certain circumstances, the Company may have an economic interest in excess of 50% but may not control and consolidate the business venture. Conversely, the Company may have an economic interest less than 50% but may control and consolidate the business venture. The Company reports its investments in and advances to these business ventures in the accompanying consolidated balance sheets as investments, at equity, and advances to 50% or less owned companies. The Company reports its share of earnings or losses from investments in 50% or less owned companies in the accompanying consolidated statements of income as equity in earnings (losses) of 50% or less owned companies, net of tax.
	The Company employs the cost method of accounting for investments in 50% or less owned companies it does not control or exercise significant influence. These investments in private companies are carried at cost and are adjusted only for capital distributions and other-than-temporary declines in fair value.
Use Of Estimates	'
	Use of Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include those related to deferred revenues, allowance for doubtful accounts, useful lives of property and equipment, impairments, income tax provisions and certain accrued liabilities. Actual results could differ from those estimates and those differences may be material.
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 this criteria is deferred until the criteria are met. Deferred revenues for the years ended December 31 were as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	6,592		$	9,845			$	20,829
	Revenues deferred during the year		—			3,806				7,402
	Revenues recognized during the year		—			(7,059		)		(18,386		)
	Balance at end of year		$	6,592		$	6,592			$	9,845
	As of December 31, 2013, deferred revenues included $6.6 million relating 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. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to August 17, 2012 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.
	The Company’s Offshore Marine Services segment earns and recognizes revenues primarily from the time charter and bareboat charter of vessels to customers based upon daily rates of hire. Under a time charter, Offshore Marine Services provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, Offshore Marine Services provides the vessel to the customer and the customer assumes responsibility for all operating expenses and risk of operation. Vessel charters may range from several days to several years. Revenues from time charters and bareboat charters are recorded and recognized as services are provided. In the U.S. Gulf of Mexico, time charter durations and rates are typically established in the context of master service agreements that govern the terms and conditions of charter.
	The Company’s Inland River Services segment earns revenues primarily from voyage affreightment contracts whereby customers are charged an established rate per ton to transport cargo from point to point. Revenues from voyage affreightment contracts are generally recognized over the progress of the voyage while the related costs are expensed as incurred. Certain of Inland River Services’ barges are operated in barge pools with other barges owned by third parties from whom Inland River Services earns and recognizes a management fee as the services are rendered. Pursuant to the pooling agreements, operating revenues and expenses of participating barges are combined and the net results are allocated on a pro-rata basis based on the number of barge days contributed by each participant. In addition, revenues are earned from equipment chartered to third parties and from the storage and demurrage of cargoes associated with affreightment activities. In both of these cases, revenues are recognized as services are rendered. Inland River Services’ tank farm and handling facility earns revenues through rental and throughput charges. Rental revenues are recognized ratably over the rental period while throughput charges are recognized as product volume moves through the facility.
	The Company’s Shipping Services segment earns revenue from the time charter, bareboat charter and voyage charter of vessels, contracts of affreightment, ship assist services and ship management agreements with vessel owners. Under a time charter, Shipping Services provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, Shipping Services provides the vessel to a customer and the customer assumes responsibility for all operating expenses and risk of operation. Revenues from time charters and bareboat charters are recognized as services are provided. Voyage contracts are contracts to carry cargoes on a single voyage basis regardless of time to complete. Contracts of affreightment are contracts for cargoes that are committed on a multi-voyage basis for various periods of time with minimum and maximum cargo tonnages specified over the period at a fixed or escalating rate per ton. Revenues for voyage contracts and contracts of affreightment are recognized over the progress of the voyage while the related costs are expensed as incurred. Ship assist services are provided by the Company's harbor towing fleet to docking and undocking cargo vessels in various ports in the U.S. Gulf of Mexico and Atlantic Coast. Revenues from ship assist services are recognized as the services are performed. Ship management agreements typically provide for technical services over a specified period of time, typically a year or more. Revenues from ship management agreements are recognized ratably over the service period.
	ICP earns revenues from the sale of alcohol, co-products and by-products. Revenues and related costs from these sales are recorded when title transfers to the buyer.
Cash Equivalents	'
	Cash Equivalents. The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. Cash equivalents consist of U.S treasury securities, money market instruments, time deposits and overnight investments.
Restricted Cash	'
	Restricted Cash. Restricted cash, primarily relates to income generated from the operations of certain of Shipping Services’ U.S.-flag product tankers and consists primarily of U.S. treasury securities (see Note 9).
Marketable Securities	'
	Marketable Securities. Marketable equity securities with readily determinable fair values and debt securities are reported in the accompanying consolidated balance sheets as marketable securities. These investments are stated at fair value with both realized and unrealized gains and losses reported in the accompanying consolidated statements of income as marketable security gains (losses), net. Short sales of marketable securities are stated at fair value in the accompanying consolidated balance sheets with both realized and unrealized gains and losses reported in the accompanying consolidated statements of income as marketable security gains (losses), net.
Trade Receivables	'
	Trade Receivables. Customers of Offshore Marine Services and Shipping Services are primarily major and independent oil and gas exploration and production companies. Customers of Inland River Services are primarily major agricultural and industrial companies based within the United States. Customers of ICP include petrochemical, agricultural and industrial companies based within the United States. Customers of the Company's other business activities primarily include industrial companies and distributors. All customers are granted credit on a short-term basis and related credit risks are considered minimal. The Company routinely reviews its trade receivables and makes provisions for probable doubtful accounts; however, those provisions are estimates and actual results could differ from those estimates and those differences may be material. Trade receivables are deemed uncollectible and removed from accounts receivable and the allowance for doubtful accounts when collection efforts have been exhausted.
Derivative Instruments	'
	Derivative Instruments. The Company accounts for derivatives through the use of a fair value concept whereby all of the Company’s derivative positions are stated at fair value in the accompanying consolidated balance sheets. Realized and unrealized gains and losses on derivatives not designated as hedges are reported in the accompanying consolidated statements of income as derivative losses, net. Realized and unrealized gains and losses on derivatives designated as cash flow hedges are reported as a component of other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income to the extent they are effective and reclassified into earnings on the same line item associated with the hedged transaction and in the same period the hedged transaction affects earnings. Any ineffective portions of cash flow hedges are reported in the accompanying consolidated statements of income as derivative losses, net. Realized and unrealized gains and losses on derivatives designated as cash flow hedges that are entered into by the Company’s 50% or less owned companies are also reported as a component of the Company’s other comprehensive income (loss) in proportion to the Company’s ownership percentage, with reclassifications and ineffective portions being included in equity in earnings (losses) of 50% or less owned companies, net of tax, in the accompanying consolidated statements of income.
Concentrations Of Credit Risk	'
	Concentrations of Credit Risk. The Company is exposed to concentrations of credit risk associated with its cash and cash equivalents, restricted cash, marketable securities and derivative instruments. The Company minimizes its credit risk relating to these positions by monitoring the financial condition of the financial institutions and counterparties involved and by primarily conducting business with large, well-established financial institutions and diversifying its counterparties. The Company does not currently anticipate nonperformance of its significant counterparties. The Company is also exposed to concentrations of credit risk relating to its receivables due from customers in the industries described above. The Company does not generally require collateral or other security to support its outstanding receivables. The Company minimizes its credit risk relating to receivables by performing ongoing credit evaluations and, to date, credit losses have not been material.
Inventories	'
	Inventories. Inventories are stated at the lower of cost (using the first-in, first-out and average cost methods) or market. Inventories consist primarily of fuel and fuel oil in the Company’s Offshore Marine Services, Shipping Services and Inland River Services segments. Inventories in ICP consist primarily of corn, high quality alcohol and fuel alcohol. Inventories in the Company's other business activities consist of sugar, rice and salt. The Company records write-downs, as needed, to adjust the carrying amount of inventories to the lower of cost or market. During the years ended December 31, 2013, 2012, and 2011, the Company recorded market write-downs of $0.2 million, $0.2 million and $0.3 million
Property And Equipment	'
	Property and Equipment. Equipment, stated at cost, is depreciated using the straight line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is typically based upon a newly built asset being placed into service and represents the point at 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 December 31, 2013, the estimated useful life (in years) of each of the Company’s major classes 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
	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’s major classes of property and equipment as of December 31 were as follows (in thousands):
			Historical			Accumulated				Net Book
			Cost(1)			Depreciation				Value
	2013
	Offshore support vessels (excluding wind farm utility)		$	1,047,119		$	(438,528	)		$	608,591
	Wind farm utility vessels		65,094			(14,121		)		50,973
	Inland river dry cargo and deck barges		241,210			(80,772		)		160,438
	Inland river liquid tank barges		85,639			(18,138		)		67,501
	Inland river towboats		61,407			(22,454		)		38,953
	U.S.-flag product tankers		318,497			(173,278		)		145,219
	RORO vessels		18,328			(3,995		)		14,333
	Harbor tugs		101,762			(34,017		)		67,745
	Ocean liquid tank barges		39,238			(7,335		)		31,903
	Terminal and manufacturing facilities		120,601			(33,594		)		87,007
	Other(2)		100,288			(40,098		)		60,190
			$	2,199,183		$	(866,330	)		$	1,332,853
	2012
	Offshore support vessels (excluding wind farm utility)		$	1,074,170		$	(398,050	)		$	676,120
	Wind farm utility vessels		58,484			(6,887		)		51,597
	Inland river dry cargo and deck barges		239,896			(70,407		)		169,489
	Inland river liquid tank barges		106,541			(18,605		)		87,936
	Inland river towboats		53,895			(20,054		)		33,841
	U.S.-flag product tankers		317,894			(154,288		)		163,606
	RORO vessels		15,674			(2,492		)		13,182
	Harbor tugs		114,974			(32,965		)		82,009
	Ocean liquid tank barges		39,073			(5,914		)		33,159
	Terminal and manufacturing facilities		120,164			(20,906		)		99,258
	Other(2)		97,618			(33,235		)		64,383
			$	2,238,383		$	(763,803	)		$	1,474,580
	______________________
	-1	Includes property and equipment acquired in business acquisitions and recorded at fair value as of the date of the acquisition.
	-2	Includes land and buildings, leasehold improvements, fixed-wing aircraft, vehicles and other property and equipment.
	Depreciation expense totaled $130.2 million, $126.1 million and $102.1 million in 2013, 2012 and 2011, respectively.
	Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized.
	Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. Capitalized interest totaled $6.4 million, $4.3 million and $5.8 million in 2013, 2012 and 2011, respectively.
Intangible Assets	'
	Intangible Assets. The Company’s intangible assets primarily arose from business acquisitions (see Note 4) and consist of non-compete agreements, trademarks and tradenames, customer relationships, software and technology, and acquired contractual rights. These intangible assets are amortized over their estimated useful lives ranging from two to ten years. During the years ended December 31, 2013, 2012, and 2011, the Company recognized amortization expense of $4.3 million, $5.6 million and $4.8 million, respectively.
	The Company’s intangible assets by type were as follows (in thousands):
			Non-Compete			Trademark/				Customer			Software/			Acquired			Total
			Agreements			Tradenames				Relationships			Technology			Contractual
																Rights
			Gross Carrying Value
	Year Ended December 31, 2011		$	901		$	9,136			$	36,350		$	590		$	5,787		$	52,764
	Acquired intangible assets		—			—				1,621			—			2,436			4,057
	Foreign currency translation		—			—				—			—			152			152
	Fully amortized intangible assets		(561		)	—				—			—			—			(561		)
	ORM Transaction (see Note 5)		(300		)	(712		)		(11,384		)	(590		)	—			(12,986		)
	Year Ended December 31, 2012		40			8,424				26,587			—			8,375			43,426
	Acquired intangible assets		—			74				1,525			—			—			1,599
	Foreign currency translation		—			—				—			—			(132		)	(132		)
	Fully amortized intangible assets		—			(437		)		—						(4,772		)	(5,209		)
	Year Ended December 31, 2013		$	40		$	8,061			$	28,112		$	—		$	3,471		$	39,684
			Accumulated Amortization
	Year Ended December 31, 2011		$	(719	)	$	(3,722	)		$	(22,476	)	$	(246	)	$	(4,073	)	$	(31,236	)
	Amortization expense		(135		)	(611		)		(3,739		)	(118		)	(1,026		)	(5,629		)
	Fully amortized intangible assets		561			—				—			—			—			561
	ORM Transaction (see Note 5)		268			350				7,201			364			—			8,183
	Year Ended December 31, 2012		(25		)	(3,983		)		(19,014		)	—			(5,099		)	(28,121		)
	Amortization expense		(8		)	(984		)		(2,454		)	—			(903		)	(4,349		)
	Fully amortized intangible assets		—			437				—			—			4,772			5,209
	Year Ended December 31, 2013		$	(33	)	$	(4,530	)		$	(21,468	)	$	—		$	(1,230	)	$	(27,261	)
	Weighted average remaining contractual life, in years		0.92			6.42				4.79			0			4.1			5.13
	Future amortization expense of intangible assets for each of the years ended December 31 is as follows (in thousands):
	2014		$	3,579
	2015		2,410
	2016		1,385
	2017		1,251
	2018		989
	Years subsequent to 2018		2,809
			$	12,423
Impairment Of Long-Lived Assets	'
	Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. If the carrying values of the assets are not recoverable, as determined by the estimated undiscounted cash flows, the carrying values of the assets are reduced to fair value. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the years ended 2013, 2012 and 2011, the Company recognized impairment charges of $3.0 million, $1.2 million and $0.1 million, respectively, related to long-lived assets held for use.
	Impairment of 50% or Less Owned Companies. The Company performs regular reviews of each 50% or less owned company's financial condition, the business outlook for its products and services, and its present and projected results and cash flows. When a 50% or less owned company has experienced consistent declines in financial performance or difficulties in raising capital to continue operations, and when the Company expects the decline to be other-than-temporary, the investment is written down to fair value. Actual results may vary from estimates due to the uncertainty regarding the projected financial performance of 50% or less owned companies, the severity and expected duration of declines in value, and the available liquidity in the capital markets to support the continuing operations of the 50% or less owned company. The Company did not recognize any impairment charges in the years ended December 31, 2013, 2012 and 2011.
Goodwill	'
	Goodwill. Goodwill is recorded when the purchase price paid for an acquisition exceeds the fair value of net identified tangible and intangible assets acquired. The Company performs an annual impairment test of goodwill and further periodic tests to the extent indicators of impairment develop between annual impairment tests. The Company’s impairment review process compares the fair value of the reporting unit to its carrying value, including the goodwill related to the reporting unit. To determine the fair value of the reporting unit, the Company uses a discounted future cash flow approach that uses estimates for revenues, costs and appropriate discount rates, among other things. These estimates are reviewed each time the Company tests goodwill for impairment and are typically developed as part of the Company’s routine business planning and forecasting process. While the Company believes its estimates and assumptions are reasonable, variations from those estimates could produce materially different results. The Company did not recognize any goodwill impairments in the years ended December 31, 2013, 2012 and 2011. During the year ended December 31, 2012, the Company deconsolidated $37.1 million of goodwill as a result of the ORM Transaction (see Note 5).
Business Combinations	'
	Business Combinations. The Company recognizes, with certain exceptions, 100 percent of the fair value of assets acquired, liabilities assumed, and noncontrolling interests when the acquisition constitutes a change in control of the acquired entity. Shares issued in consideration for a business combination, contingent consideration arrangements and pre-acquisition loss and gain contingencies are all measured and recorded at their acquisition-date fair value. Subsequent changes to fair value of contingent consideration arrangements are generally reflected in earnings. Any in-process research and development assets acquired are capitalized as are certain acquisition-related restructuring costs if the criteria related to exit or disposal cost obligations are met as of the acquisition date. Acquisition-related transaction costs are expensed as incurred and any changes in an acquirer’s existing income tax valuation allowances and tax uncertainty accruals are recorded as an adjustment to income tax expense. The operating results of entities acquired are included in the accompanying consolidated statements of income from the date of acquisition (see Note 4).
Deferred Financing Costs	'
	Deferred Financing Costs. Deferred financing costs incurred in connection with the issuance of debt are amortized over the life of the related debt using the effective interest rate method for term loans and straight line method for revolving credit facilities. Amortization of deferred financing costs totaled $1.9 million, $0.5 million and $0.5 million for the years ended December 31, 2013, 2012 and 2011, respectively, and is included in interest expense in the accompanying consolidated statements of income.
Self-Insurance Liabilities	'
	Self-insurance Liabilities. The Company maintains hull, liability and war risk, general liability, workers compensation and other insurance customary in the industries in which it operates. Most of the insurance is obtained through SEACOR sponsored programs, with premiums charged to participating businesses based on insured asset values. Both the marine hull and liability policies have significant annual aggregate deductibles. Marine hull annual aggregate deductibles are accrued as claims are incurred by participating businesses and proportionately shared among the participating businesses. Marine liability annual aggregate deductibles are accrued based on historical loss experience and actual claims incurred. The Company also maintains self-insured health benefit plans for its participating employees. Exposure to the health benefit plans are limited by maintaining stop-loss and aggregate liability coverage. To the extent that estimated self-insurance losses, including the accrual of annual aggregate deductibles, differ from actual losses realized, the Company’s insurance reserves could differ significantly and may result in either higher or lower insurance expense in future periods.
Income Taxes	'
	Income Taxes. Deferred income tax assets and liabilities have been provided in recognition of the income tax effect attributable to the book and tax basis differences of assets and liabilities reported in the accompanying consolidated financial statements. Deferred tax assets or liabilities are provided using the enacted tax rates expected to apply to taxable income in the periods in which they are expected to be settled or realized. Interest and penalties relating to uncertain tax positions are recognized in interest expense and administrative and general, respectively, in the accompanying consolidated statements of income. The Company records a valuation allowance to reduce its deferred tax assets if it is more likely than not that some portion or all of the deferred tax assets will not be realized.
Deferred Gains	'
	Deferred Gains – Equipment Sale-Leaseback Transactions and Financed Equipment Sales. From time to time, the Company enters into equipment sale-leaseback transactions with finance companies or provides seller financing on sales of its equipment to third parties or 50% or less owned companies. A portion of the gains realized from these transactions is not immediately recognized in income and has been recorded in the accompanying consolidated balance sheets in deferred gains and other liabilities. In sale-leaseback transactions (see Note 4), gains are deferred to the extent of the present value of future minimum lease payments and are amortized as reductions to rental expense over the applicable lease terms. In financed equipment sales (see Note 4), gains are deferred to the extent that the repayment of purchase notes is dependent on the future operations of the sold equipment and are amortized based on cash received from the buyers. Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	96,447		$	101,155			$	113,871
	Deferred gains arising from equipment sales		26,881			23,183				12,319
	Amortization of deferred gains included in operating expenses as reduction to rental expense		(10,687		)	(16,652		)		(22,191		)
	Amortization of deferred gains included in gains on asset dispositions and impairments, net		(2,099		)	(11,239		)		(2,834		)
	Reductions of deferred gains on repurchased equipment and other		—			—				(10		)
	Balance at end of year		$	110,542		$	96,447			$	101,155
	Deferred Gains – Equipment Sales to the Company’s 50% or Less Owned Companies. A portion of the gains realized from non-financed sales of the Company’s vessels and barges to its 50% or less owned companies is not immediately recognized in income and has been recorded in the accompanying consolidated balance sheets in deferred gains and other liabilities. Effective January 1, 2009, the Company adopted new accounting rules related to the sale of its equipment to its 50% or less owned companies. For transactions occurring subsequent to the adoption of the new accounting rules, gains are deferred only to the extent of the Company's uncalled capital commitments and amortized as those commitments lapse or funded amounts are returned by the 50% or less owned companies. For transactions occurring prior to the adoption of the new accounting rules, gains were deferred and are being amortized based on the Company's ownership interest, the Company's uncalled capital commitments, cash received and the applicable equipment's useful lives. Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	15,066		$	16,036			$	16,881
	Amortization of deferred gains included in gains on asset dispositions and impairments, net		(845		)	(970		)		(845		)
	Balance at end of year		$	14,221		$	15,066			$	16,036
Stock Based Compensation	'
	Stock Based Compensation. Stock based compensation is amortized to compensation expense on a straight line basis over the requisite service period of the grants using the Black-Scholes valuation model. The Company will reconsider its use of this model if additional information becomes available in the future that indicates another model would be more appropriate or if grants issued in future periods have characteristics that cannot be reasonably estimated using this model. The Company does not estimate forfeitures in its expense calculations as forfeiture history has been minor. The Company presents the excess tax benefits from the exercise of stock options as a financing cash flow in the accompanying consolidated statements of cash flows.
Foreign Currency Translation And Transactions	'
	Foreign Currency Translation. The assets, liabilities and results of operations of certain SEACOR subsidiaries are measured using their functional currency which is the currency of the primary foreign economic environment in which they operate. Upon consolidating these subsidiaries with SEACOR, their assets and liabilities are translated to U.S. dollars at currency exchange rates as of the balance sheet dates and their revenues and expenses are translated at the weighted average currency exchange rates during the applicable reporting periods. Translation adjustments resulting from the process of translating these subsidiaries’ financial statements are reported in other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income.
	Foreign Currency Transactions. Certain SEACOR subsidiaries enter into transactions denominated in currencies other than their functional currency. Gains and losses resulting from changes in currency exchange rates between the functional currency and the currency in which a transaction is denominated are included in foreign currency gains (losses), net in the accompanying consolidated statements of income in the period in which the currency exchange rates change.
Earnings Per Share	'
	Earnings Per Share. 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 for the years ended December 31 were as follows (in thousands, except share data):
			Net Income			Average o/s Shares			Per Share
	2013
	Basic Weighted Average Common Shares Outstanding		$	36,970		19,893,954			$	1.86
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			399,333
	Convertible Securities(2)(3)		—			—
	Diluted Weighted Average Common Shares Outstanding		$	36,970		20,293,287			$	1.82
	2012
	Basic Weighted Average Common Shares Outstanding		$	61,215		20,426,770			$	3
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			349,126
	Convertible Securities(2)		—			—
	Diluted Weighted Average Common Shares Outstanding		$	61,215		20,775,896			$	2.95
	2011
	Basic Weighted Average Common Shares Outstanding		$	41,056		21,119,461			$	1.94
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			347,382
	Diluted Weighted Average Common Shares Outstanding		$	41,056		21,466,843			$	1.91
	______________________
	-1	For the years ended December 31, 2013, 2012 and 2011, diluted earnings per common share of SEACOR excluded 133,315, 549,223 and 338,920, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive.
	-2	For the years ended December 31, 2013 and 2012, diluted earnings per common share of SEACOR excluded 4,200,525 and 176,609 shares, respectively, issuable pursuant to the Company's 2.5% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.
	-3	For the year ended December 31, 2013, diluted earnings per common share of SEACOR excluded 240,043 shares issuable pursuant to the Company's 3.0% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.
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.

Nature_Of_Operations_And_Accou2

Nature Of Operations And Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Nature Of Operations And Accounting Policies [Abstract]	'
Deferred Revenues Included In Other Current Liabilities	'
	Deferred revenues for the years ended December 31 were as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	6,592		$	9,845			$	20,829
	Revenues deferred during the year		—			3,806				7,402
	Revenues recognized during the year		—			(7,059		)		(18,386		)
	Balance at end of year		$	6,592		$	6,592			$	9,845
Schedule Of Estimated Useful Life Of Equipment	'
	As of December 31, 2013, the estimated useful life (in years) of each of the Company’s major classes 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
	RORO(1) vessels	20
	Harbor tugs	25
	Ocean liquid tank barges	25
	Terminal and manufacturing facilities	20
	______________________
	-1	Roll on/Roll off ("RORO").
Property Plant And Equipment By Major Class [Text Block]	'
	Property and Equipment. Equipment, stated at cost, is depreciated using the straight line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is typically based upon a newly built asset being placed into service and represents the point at 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 December 31, 2013, the estimated useful life (in years) of each of the Company’s major classes 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
	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’s major classes of property and equipment as of December 31 were as follows (in thousands):
			Historical			Accumulated				Net Book
			Cost(1)			Depreciation				Value
	2013
	Offshore support vessels (excluding wind farm utility)		$	1,047,119		$	(438,528	)		$	608,591
	Wind farm utility vessels		65,094			(14,121		)		50,973
	Inland river dry cargo and deck barges		241,210			(80,772		)		160,438
	Inland river liquid tank barges		85,639			(18,138		)		67,501
	Inland river towboats		61,407			(22,454		)		38,953
	U.S.-flag product tankers		318,497			(173,278		)		145,219
	RORO vessels		18,328			(3,995		)		14,333
	Harbor tugs		101,762			(34,017		)		67,745
	Ocean liquid tank barges		39,238			(7,335		)		31,903
	Terminal and manufacturing facilities		120,601			(33,594		)		87,007
	Other(2)		100,288			(40,098		)		60,190
			$	2,199,183		$	(866,330	)		$	1,332,853
	2012
	Offshore support vessels (excluding wind farm utility)		$	1,074,170		$	(398,050	)		$	676,120
	Wind farm utility vessels		58,484			(6,887		)		51,597
	Inland river dry cargo and deck barges		239,896			(70,407		)		169,489
	Inland river liquid tank barges		106,541			(18,605		)		87,936
	Inland river towboats		53,895			(20,054		)		33,841
	U.S.-flag product tankers		317,894			(154,288		)		163,606
	RORO vessels		15,674			(2,492		)		13,182
	Harbor tugs		114,974			(32,965		)		82,009
	Ocean liquid tank barges		39,073			(5,914		)		33,159
	Terminal and manufacturing facilities		120,164			(20,906		)		99,258
	Other(2)		97,618			(33,235		)		64,383
			$	2,238,383		$	(763,803	)		$	1,474,580
	______________________
	-1	Includes property and equipment acquired in business acquisitions and recorded at fair value as of the date of the acquisition.
	-2	Includes land and buildings, leasehold improvements, fixed-wing aircraft, vehicles and other property and equipment.
Schedule Of Intangible Assets	'
	The Company’s intangible assets by type were as follows (in thousands):
			Non-Compete			Trademark/				Customer			Software/			Acquired			Total
			Agreements			Tradenames				Relationships			Technology			Contractual
																Rights
			Gross Carrying Value
	Year Ended December 31, 2011		$	901		$	9,136			$	36,350		$	590		$	5,787		$	52,764
	Acquired intangible assets		—			—				1,621			—			2,436			4,057
	Foreign currency translation		—			—				—			—			152			152
	Fully amortized intangible assets		(561		)	—				—			—			—			(561		)
	ORM Transaction (see Note 5)		(300		)	(712		)		(11,384		)	(590		)	—			(12,986		)
	Year Ended December 31, 2012		40			8,424				26,587			—			8,375			43,426
	Acquired intangible assets		—			74				1,525			—			—			1,599
	Foreign currency translation		—			—				—			—			(132		)	(132		)
	Fully amortized intangible assets		—			(437		)		—						(4,772		)	(5,209		)
	Year Ended December 31, 2013		$	40		$	8,061			$	28,112		$	—		$	3,471		$	39,684
			Accumulated Amortization
	Year Ended December 31, 2011		$	(719	)	$	(3,722	)		$	(22,476	)	$	(246	)	$	(4,073	)	$	(31,236	)
	Amortization expense		(135		)	(611		)		(3,739		)	(118		)	(1,026		)	(5,629		)
	Fully amortized intangible assets		561			—				—			—			—			561
	ORM Transaction (see Note 5)		268			350				7,201			364			—			8,183
	Year Ended December 31, 2012		(25		)	(3,983		)		(19,014		)	—			(5,099		)	(28,121		)
	Amortization expense		(8		)	(984		)		(2,454		)	—			(903		)	(4,349		)
	Fully amortized intangible assets		—			437				—			—			4,772			5,209
	Year Ended December 31, 2013		$	(33	)	$	(4,530	)		$	(21,468	)	$	—		$	(1,230	)	$	(27,261	)
	Weighted average remaining contractual life, in years		0.92			6.42				4.79			0			4.1			5.13
Schedule Of Future Amortization Expense Of Intangible Assets	'
	Future amortization expense of intangible assets for each of the years ended December 31 is as follows (in thousands):
	2014		$	3,579
	2015		2,410
	2016		1,385
	2017		1,251
	2018		989
	Years subsequent to 2018		2,809
			$	12,423
Schedule of Deferred Gains	'
	Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	15,066		$	16,036			$	16,881
	Amortization of deferred gains included in gains on asset dispositions and impairments, net		(845		)	(970		)		(845		)
	Balance at end of year		$	14,221		$	15,066			$	16,036
	Deferred gain activity related to these transactions for the years ended December 31 was as follows (in thousands):
			2013			2012				2011
	Balance at beginning of year		$	96,447		$	101,155			$	113,871
	Deferred gains arising from equipment sales		26,881			23,183				12,319
	Amortization of deferred gains included in operating expenses as reduction to rental expense		(10,687		)	(16,652		)		(22,191		)
	Amortization of deferred gains included in gains on asset dispositions and impairments, net		(2,099		)	(11,239		)		(2,834		)
	Reductions of deferred gains on repurchased equipment and other		—			—				(10		)
	Balance at end of year		$	110,542		$	96,447			$	101,155
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive income (loss) were as follows:
			SEACOR Holdings Inc. Stockholders Equity													Noncontrolling
																Interests
			Foreign			Derivative				Other			Total			Foreign			Other			Other
			Currency			Losses on										Currency						Comprehensive
			Translation			Cash Flow										Translation						Income (Loss)
			Adjustments			Hedges, net										Adjustments
	Year ended December 31, 2010		$	(3,995	)	$	(2,933	)		$	(111	)	$	(7,039	)	$	—		$	—
	Other comprehensive income (loss)		(629		)	(900		)		116			(1,413		)	(118		)	—			$	(1,531	)
	Income tax (expense) benefit		220			315				(41		)	494			—			—			494
	Year ended December 31, 2011		(4,404		)	(3,518		)		(36		)	(7,958		)	(118		)	—			$	(1,037	)
	Other comprehensive income (loss)		4,871			4,286				31			9,188			439			(10		)	$	9,617
	Income tax (expense) benefit		(1,705		)	(1,500		)		(11		)	(3,216		)	—			—			(3,216		)
	Year ended December 31, 2012		(1,238		)	(732		)		(16		)	(1,986		)	321			(10		)	$	6,401
	Distribution of Era Group stock to shareholders		(55		)	—				—			(55		)	—			—
	Other comprehensive income (loss)		563			731				12			1,306			74			5			$	1,385
	Income tax (expense) benefit		(197		)	(256		)		(4		)	(457		)	—			—			(457		)
	Year ended December 31, 2013		$	(927	)	$	(257	)		$	(8	)	$	(1,192	)	$	395		$	(5	)	$	928
Schedule Of Earnings Per Share	'
	Computations of basic and diluted earnings per common share of SEACOR for the years ended December 31 were as follows (in thousands, except share data):
			Net Income			Average o/s Shares			Per Share
	2013
	Basic Weighted Average Common Shares Outstanding		$	36,970		19,893,954			$	1.86
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			399,333
	Convertible Securities(2)(3)		—			—
	Diluted Weighted Average Common Shares Outstanding		$	36,970		20,293,287			$	1.82
	2012
	Basic Weighted Average Common Shares Outstanding		$	61,215		20,426,770			$	3
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			349,126
	Convertible Securities(2)		—			—
	Diluted Weighted Average Common Shares Outstanding		$	61,215		20,775,896			$	2.95
	2011
	Basic Weighted Average Common Shares Outstanding		$	41,056		21,119,461			$	1.94
	Effect of Dilutive Securities:
	Options and Restricted Stock(1)		—			347,382
	Diluted Weighted Average Common Shares Outstanding		$	41,056		21,466,843			$	1.91
	______________________
	-1	For the years ended December 31, 2013, 2012 and 2011, diluted earnings per common share of SEACOR excluded 133,315, 549,223 and 338,920, respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive.
	-2	For the years ended December 31, 2013 and 2012, diluted earnings per common share of SEACOR excluded 4,200,525 and 176,609 shares, respectively, issuable pursuant to the Company's 2.5% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.
	-3	For the year ended December 31, 2013, diluted earnings per common share of SEACOR excluded 240,043 shares issuable pursuant to the Company's 3.0% Convertible Senior Notes (see Note 9) as the effect of their inclusion in the computation would be anti-dilutive.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Financial Assets And Liabilities Measured At Fair Value On Recurring Basis	'
			Level 1		Level 2		Level 3
	2013
	ASSETS
	Marketable securities(1)		$	24,292	$	—	$	—
	Derivative instruments (included in other receivables)		185		6,072		—
	Construction reserve funds and Title XI reserve funds		261,739		—		—
	LIABILITIES
	Short sales of marketable securities		10,697		—		—
	Derivative instruments (included in other current liabilities)		1,511		1,828		—
	2012
	ASSETS
	Marketable securities(1)		$	21,688	$	—	$	—
	Derivative instruments (included in other receivables)		2,840		4,696		—
	Construction reserve funds and Title XI reserve funds		195,629		—		—
	LIABILITIES
	Short sales of marketable securities		8,277		—		—
	Derivative instruments (included in other current liabilities)		840		6,140		—
	______________________
	-1	Marketable security gains (losses), net include gains of $5.8 million and losses of $0.7 million and $7.5 million for the years ended December 31, 2013, 2012 and 2011, respectively, related to marketable security positions held by the Company as of December 31, 2013. Marketable security gains (losses), net include losses of $0.9 million and $7.7 million for the years ended December 31, 2012 and 2011, respectively, related to marketable security positions held by the Company as of December 31, 2012. During the years ended December 31, 2013, 2012 and 2011, the Company recorded net dividend expense on marketable securities of $0.2 million, $0.5 million and $0.8 million, respectively. During the year ended December 31, 2013, net interest income on marketable securities was not material. During the years ended December 31, 2012 and 2011, the Company recorded net interest income on marketable securities of $0.2 million and $2.8 million, respectively.
Estimated Fair Value Of Other Financial Assets And Liabilities	'
					Estimated Fair Value
			Carrying		Level 1		Level 2		Level 3
			Amount
	2013
	ASSETS
	Cash, cash equivalents and restricted cash		$	539,610	$	539,610	$	—	$	—
	Investments, at cost, in 50% or less owned companies (included in other assets)		9,315		see below
	Notes receivable from third parties (included in other receivables and other assets)		13,544		see below
	LIABILITIES
	Long-term debt, including current portion(1)		879,441		—		1,094,193		—
	2012
	ASSETS
	Cash, cash equivalents and restricted cash		276,489		276,489		—		—
	Investments, at cost, in 50% or less owned companies (included in other assets)		9,315		see below
	Notes receivable from third parties (included in other receivables and other assets)		26,063		see below
	LIABILITIES
	Long-term debt, including current portion(2)		677,229		—		747,973		—
	______________________
	-1	The estimated fair value includes the conversion option on the Company's 2.5% and 3.0% Convertible Notes.
	-2	The estimated fair value includes the conversion option on the Company's 2.5% Convertible Notes.
Non-Financial Assets And Liabilities Measured At Fair Value	'
			Level 1		Level 2		Level 3
	2013
	ASSETS
	Long-lived assets under construction(1)		$	17,494	$	—	$	—
	Investment in C-Lift LLC(2)		—		13,290		—
	Contribution of non-cash consideration to Dorian LPG Ltd.(3)		—		14,989		—
	Investment in Zhuhai SEACOR/Avion Logistics Company Limited (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)(4)		—		924		—
	2012
	ASSETS
	Investment in ICP(5)		$	—	$	30,916	$	—
	Long-lived assets held for sale(6)		—		8,400		—
	Investment in Witt O'Brien's (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)(7)		—		50,261		—
	______________________
	-1	During the year ended December 31, 2013, the Company recognized impairment charges of $3.0 million related to two of Shipping Services' harbor tugs while under construction, which were sold and leased back upon their completion (see Note 4).
	-2	During the year ended December 31, 2013, the Company marked its equity investment in C-Lift LLC ("C-Lift") to fair value following its acquisition of a controlling interest (see Note 4). The investment's fair value was determined based on the Company's purchase price of the acquired interest.
	-3	During the year ended December 31, 2013, the Company marked to fair value the non-cash consideration contributed to Dorian LPG Ltd. ("Dorian") in exchange for an equity investment (see Note 5). The fair value was determined based on the value of the equity investment the Company received.
	-4	During the year ended December 31, 2013, the Company marked its equity investment in Zhuhai SEACOR/Avion Logistics Company Limited, an Asian industrial aviation company, to fair value upon the deconsolidation of the previously controlled subsidiary following the sale of a portion of the Company's ownership to a third party. The investment's fair value was determined based on the purchase price of the Company's interest sold.
	-5	On February 1, 2012, the Company marked its equity investment in its ICP to fair value following the acquisition of a controlling interest (see Note 5). The investment's fair value was determined based on a fair value analysis of the assets and liabilities of ICP.
	-6	During the year ended December 31, 2012, the Company recorded an impairment loss of $1.2 million to reduce the carrying value of one of its fixed-wing aircraft used in its lending and leasing activities following the conclusion of a lease.
	-7	On December 31, 2012, the Company marked its equity investment in Witt O'Brien's LLC, a response management company, to fair value following the ORM Transaction (see Note 5). The investment's fair value was determined based the Company's interest in the fair value of the assets and liabilities of Witt O'Brien's.

Derivative_Instruments_And_Hed1

Derivative Instruments And Hedging Strategies (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair Values Of Derivative Instruments	'
	The fair values of the Company’s derivative instruments as of December 31 were as follows (in thousands):
		2013						2012
		Derivative			Derivative			Derivative			Derivative
		Asset			Liability			Asset			Liability
	Derivatives not designated as hedging instruments:
	Options on equities and equity indices	$	224		$	7		$	351		$	1
	Forward currency exchange, option and future contracts	349			213			11			160
	Interest rate swap agreements	—			1,615			—			5,884
	Commodity swap, option and future contracts:
	Exchange traded	185			1,504			2,826			736
	Non-exchange traded	5,499			—			4,348			199
		$	6,257		$	3,339		$	7,536		$	6,980
Recognized Gains (Losses) On Derivative Instruments Designated As Cash Flow Hedges	'
	The Company recognized gains (losses) on derivative instruments designated as cash flow hedges for the years December 31 as follows (in thousands):
		Other comprehensive income (loss)
		2013			2012			2011
	Interest rate swap agreements, effective portion	$	109		$	(1,710	)	$	(4,532	)
	Reclassification of derivative losses to interest expense or equity in earnings (losses) of 50% or less owned companies	622			2,724			3,632
	Reclassification of net derivative losses on cash flow hedges to derivative losses, net upon dedesignation	—			3,272			—
		$	731		$	4,286		$	(900	)
		Derivative gains (losses), net
		2013			2012			2011
	Interest rate swap agreements, ineffective portion	$	—		$	(58	)	$	(46	)
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 years ended December 31 as follows (in thousands):
		Derivative gains (losses), net
		2013			2012			2011
	Options on equities and equity indices	$	(5,270	)	$	(680	)	$	1,693
	Forward currency exchange, option and future contracts	(451		)	837			(621		)
	Interest rate swap agreements	(37		)	(3,778		)	(1,103		)
	Commodity swap, option and future contracts:
	Exchange traded	(3,915		)	(1,020		)	(2,008		)
	Non-exchange traded	1,350			1,887			331
	U.S. treasury notes, rate locks and bond future and option contracts	—			—			(28,301		)
		$	(8,323	)	$	(2,754	)	$	(30,009	)

Acquisitions_And_Dispositions_

Acquisitions And Dispositions (Tables)	12 Months Ended
	Dec. 31, 2013
Business Combination, Description [Abstract]	'
Allocation Of Purchase Price For Business Acquisitions	'
	Purchase Price Allocation. The allocation of the purchase price for the Company’s acquisitions for the years ended December 31 was as follows (in thousands):
			2013				2012			2011
	Trade and other receivables		$	3,250			$	17,356		$	2,882
	Other current assets		32				16,282			1,105
	Investments, at Equity, and Advances to 50% or Less Owned Companies		(13,290		)		(42,358		)	(11,920		)
	Property and Equipment		43,521				178,025			137,533
	Goodwill		—				(1,586		)	3,264
	Intangible Assets		1,599				4,057			6,602
	Other Assets		—				(332		)	3,500
	Accounts payable		(264		)		(4,701		)	(3,060		)
	Other current liabilities		(1,053		)		(4,093		)	(518		)
	Long-Term Debt		(22,668		)		(946		)	(37,400		)
	Deferred Income Taxes		—				—			(1,116		)
	Other Liabilities		—				(166		)	—
	Accumulated other comprehensive loss, net of tax		—				9			—
	Noncontrolling interests in subsidiaries		—				(13,459		)	(10,284		)
	Purchase price(1)		$	11,127			$	148,088		$	90,588
	______________________
	-1	Purchase price is net of cash acquired (totaling $2.2 million, $3.7 million and $5.3 million in 2013, 2012 and 2011, respectively) and includes issued Common Stock valued at $0.6 million in 2012.
Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]	'
	Major equipment placed in service for the years ended December 31 were as follows (unaudited):
			2013(1)			2012(2)			2011(3)
	Offshore Support Vessels:
	Anchor handling towing supply		—			2			—
	Crew		—			—			2
	Mini-Supply		—			—			1
	Supply		1			2			—
	Specialty		2			1			—
	Wind farm utility		5			1			—
			8			6			3
	Inland River dry cargo and deck barges		—			3			55
	Inland River liquid tank barges		2			5			2
	Inland River towboats		1			2			—
	RORO vessels		1			—			—
	Harbor Tugs:
	Azimuth drive		4			—			1
	______________________
	-1	Excludes two liftboats acquired in the C-Lift acquisition.
	-2	Excludes 18 liftboats acquired in the Superior Liftboat acquisition and excludes an interest in one U.S.-flagged articulated tug barge acquired and immediately contributed to SeaJon (see Note 5).
	-3	Excludes eight foreign-flag RORO vessels acquired in the G&G Shipping Acquisition and 28 wind farm utility vessels acquired in the Windcat Acquisition.
Major Equipment Dispositions	'
	Major equipment dispositions for the years ended December 31 were as follows (unaudited):
			2013			2012(1)			2011(2)
	Offshore Support Vessels:
	Anchor handling towing supply		—			2			1
	Crew		5			2			6
	Mini-supply		1			—			—
	Standby Safety		—			1			1
	Supply		2			2			1
	Towing supply		—			—			1
	Specialty		3			—			1
	Liftboats		6			—			—
	Wind farm utility		2			—			—
			19			7			11
	Inland River dry cargo and deck barges		16			9			6
	Inland River liquid tank barges		8			1			1
	Inland River towboats		—			2			1
	U.S.-flag product tankers		—			—			1
	Foreign-flag RORO vessels		—			1			—
	Harbor Tugs:
	Azimuth drive		7			3			1
	Conventional drive		1			2			1
			8			5			2
	______________________
	-1	Excludes one U.S.-flag articulated tug-barge contributed to SeaJon (see Note 5).
	-2	Excludes four crew and one mini-supply vessel operated by Mexmar (see Note 5).

Investments_At_Equity_And_Adva1

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Tables)	12 Months Ended
	Dec. 31, 2013
Equity Method Investment, Summarized Financial Information [Abstract]	'
Summarized Financial Information For The Company's Investments, At Equity	'
	Investments, at equity, and advances to 50% or less owned companies as of December 31 were as follows (in thousands):
			Ownership					2013			2012
	Offshore Marine Services:
	MexMar		49.00%					28,564			18,162
	Sea-Cat Crewzer II		50.00%					22,900			—
	Dynamic Offshore Drilling		19.00%					11,622			10,483
	Sea-Cat Crewzer		50.00%					7,833			7,183
	Nautical Power		50.00%					6,399			11,060
	OSV Partners		30.40%					3,951			—
	C-Lift		50.00%					—			5,445
	Other		20.00%	–	50.00%			17,891			14,472
								99,160			66,805
	Inland River Services:
	SCFCo Holdings		50.00%					27,710			25,351
	Bunge-SCF Grain		50.00%					17,697			19,315
	SCF Bunge Marine		50.00%					6,158			5,604
	Other		50.00%					3,846			3,574
								55,411			53,844
	Shipping Services:
	Dorian		21.80%					129,785			—
	Trailer Bridge		47.30%					57,881			60,224
	SeaJon		50.00%					9,479			6,799
								197,145			67,023
	Other:
	Witt O'Brien's(1)		54.20%					52,289			50,261
	Hawker Pacific		34.20%					21,596			23,004
	Avion		39.10%					13,127			11,152
	Other		34.00%	–	50	%		2,125			446
								89,137			84,863
								$	440,853		$	272,535
	______________________
	-1	The Company's ownership represents its economic interest in the noncontrolled company.
	Combined Condensed Financials. Summarized financial information for the Company’s investments, at equity, as of and for the years ended December 31 was as follows (in thousands):
			2013				2012
	Current assets		$	749,369			$	458,758
	Noncurrent assets		1,387,601				726,034
	Current liabilities		345,260				371,597
	Noncurrent liabilities		682,348				371,550
			2013				2012			2011
	Operating Revenues		$	1,087,637			$	774,912		$	691,189
	Costs and Expenses:
	Operating and administrative		955,583				699,061			643,612
	Depreciation		61,813				40,440			29,859
			1,017,396				739,501			673,471
	Loss on Asset Dispositions		(397		)		—			—
	Operating Income		$	69,844			$	35,411		$	17,718
	Net Income (Loss)		$	17,312			$	4,640		$	(3,252	)

Construction_Reserve_Funds_Tab

Construction Reserve Funds (Tables)	12 Months Ended
	Dec. 31, 2013
Construction Reserve Funds [Abstract]	'
Schedule of Construction Reserve Funds [Table Text Block]	'
	Construction reserve fund transactions for the years ended December 31 were as follows (in thousands):
		2013			2012			2011
	Withdrawals	$	(65,493	)	$	(122,695	)	$	(82,553	)
	Deposits	131,603			58,350			18,642
		$	66,110		$	(64,345	)	$	(63,911	)

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule Of Income Before Income Tax, Domestic and Foreign	'
	Income from continuing operations before income tax expense (benefit) and equity in earnings (losses) of 50% or less owned companies derived from U.S. and foreign companies for the years ended December 31 were as follows (in thousands):
		2013				2012				2011
	United States	$	71,669			$	82,383			$	14,556
	Foreign	(7,596		)		(176		)		(5,886		)
	Eliminations and other	3,559				(27,635		)		(4,901		)
		$	67,632			$	54,572			$	3,769
Components Of Income Tax Expense (Benefit)	'
	The Company files a consolidated U.S. federal tax return. The components of income tax expense (benefit) for the years ended December 31 were as follows (in thousands):
		2013				2012				2011
	Current:
	State	$	1,723			$	3,604			$	2,814
	Federal	6,311				36,057				18,715
	Foreign	8,142				7,921				9,040
		16,176				47,582				30,569
	Deferred:
	State	(985		)		(40		)		(615		)
	Federal	11,532				(23,572		)		(26,569		)
	Foreign	24				211				(75		)
		10,571				(23,401		)		(27,259		)
		$	26,747			$	24,181			$	3,310
Components Of Effective Income Tax Rate Reconciliation	'
	The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate on continuing operations for the years ended December 31:
		2013			2012			2011
	Statutory rate	35	%		35	%		35	%
	Non-deductible expenses	0.4	%		6.1	%		4.9	%
	Reversal of valuation allowance on foreign tax credit carryforwards	—	%		(5.5	)%		—	%
	Losses of foreign subsidiaries not benefited	5.1	%		4.2	%		17.2	%
	State taxes	0.2	%		4.2	%		32.2	%
	Other	(1.1	)%		0.3	%		(1.5	)%
		39.6	%		44.3	%		87.8	%
Components Of The Net Deferred Income Tax Liabilities	'
	The components of the net deferred income tax liabilities for the years ended December 31 were as follows (in thousands):
		2013				2012
	Deferred tax liabilities:
	Property and Equipment	$	343,411			$	328,355
	Long-term Debt	56,587				36,864
	Unremitted earnings of foreign subsidiaries	40,321				41,382
	Investments in 50% or Less Owned Companies	23,573				24,392
	Other	9,050				7,235
	Total deferred tax liabilities	472,942				438,228
	Deferred tax assets:
	Share award plans	8,347				6,920
	Other	13,662				14,801
	Total deferred tax assets	22,009				21,721
	Valuation allowance	(6,778		)		(5,990		)
	Net deferred tax assets	15,231				15,731
	Net deferred tax liabilities	$	457,711			$	422,497

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Long-term Debt, Unclassified [Abstract]	'
Schedule Of Company's Borrowings	'
	The Company’s borrowings as of December 31 were as follows (in thousands):
		2013			2012
	3.0% Convertible Notes (excluding unamortized discount of $47.8 million)	$	230,000		$	—
	2.5% Convertible Notes (excluding unamortized discount of $40.4 million)	350,000			350,000
	7.375% Senior Notes (excluding unamortized discount of $1.0 million)	233,500			233,500
	Title XI Bonds (excluding unamortized discount of $9.3 million)	85,217			90,733
	Other (excluding unamortized discount of $1.3 million)	80,563			64,007
		979,280			738,240
	Portion due within one year	(45,323		)	(21,920		)
	Debt discount, net	(99,839		)	(61,011		)
		$	834,118		$	655,309
Schedule Of Long-Term Debt Maturities	'
	2014	$	45,323
	2015	18,791
	2016	13,711
	2017	14,119
	2018	14,404
	Years subsequent to 2019	872,932
		$	979,280

Share_Based_Compensation_Table

Share Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share Based Compensation Plans	'
		2013		2012		2011
	Restricted stock awards granted	148,300		134,600		183,500
	Restricted stock awards forfeited	(18,000	)	(2,120	)	(4,100	)
	Director stock awards granted	2,500		4,000		4,000
	Restricted Stock Unit Activities:
	Outstanding as of the beginning of year	—		1,130		531
	Granted	—		—		650
	Converted to shares	—		(1,130	)	(51	)
	Outstanding as of the end of year	—		—		1,130
	Shares released from Deferred Compensation Plan	(1,692	)	—		(63	)
	Stock Option Activities:
	Outstanding as of the beginning of year	1,281,821		1,272,192		1,130,356
	Granted(1)	529,912		173,700		290,960
	Exercised	(328,077	)	(149,781	)	(146,169	)
	Forfeited	(800	)	—		(1,920	)
	Expired	(1,576	)	(14,290	)	(1,035	)
	Outstanding as of the end of year	1,481,280		1,281,821		1,272,192
	Employee Stock Purchase Plan shares issued	31,586		39,980		47,376
	Shares available for issuance under Share Incentive and Employee Stock Purchase Plans as of the end of year	508,495		1,200,417		538,287
Schedule Of Share-based Compensation, Restricted Stock And Restricted Stock Units Activity	'
		Restricted Stock
		Number of		Weighted
		Shares		Average
				Grant Price
	Nonvested as of December 31, 2012	180,930		$	92.85
	Granted	148,300		$	68.23
	Vested(1)(2)	(8,860	)	$	72.79
	Forfeited	(18,000	)	$	81.78
	Nonvested as of December 31, 2013(1)	302,370		$	70.61
Schedule Of Share-based Compensation, Stock Options, Activity	'
		Nonvested Options					Vested/Exercisable Options				Total Options
		Number of		Weighted			Number of		Weighted		Number of		Weighted
		Shares		Average			Shares		Average		Shares		Average
				Grant Date					Exercise Price				Exercise Price
				Fair Value
	Outstanding, as of	533,660		$	27.72		748,161		$	63.36	1,281,821		$	68.96
	31-Dec-12
	Granted(1)(2)	354,254		$	26.12		175,658		$	45.64	529,912		$	63.19
	Vested(1)	(235,508	)	$	21.61		235,508		$	56.62	—		$	—
	Exercised(1)	—		$	—		(328,077	)	$	51.17	(328,077	)	$	51.17
	Forfeited(1)	(800	)	$	23.22		—		$	—	(800	)	$	72.84
	Expired(1)	—		$	—		(1,576	)	$	72.04	(1,576	)	$	72.04
	Outstanding, as of	651,606		$	23.36		829,674		$	50.42	1,481,280		$	57.95
	December 31, 2013(1)

Commitments_And_Contingencies_

Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Operating Leases Future Minimum Payments [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	Future minimum payments in the years ended December 31 under operating leases that have a remaining term in excess of one year as of December 31, 2013 for the Company, were as follows (in thousands):
			Total  Minimum		Non-cancellable			Net Minimum
			Payments		Subleases(1)			Payments
	2014		$	43,940	$	(17,345	)	$	26,595
	2015		41,282		(17,345		)	23,937
	2016		36,888		(17,392		)	19,496
	2017		34,933		(17,345		)	17,588
	2018		33,743		(17,345		)	16,398
	Years subsequent to 2018		102,920		(76,127		)	26,793
	______________________
	-1	The total minimum offsetting payments to be received under existing long-term bareboat charter-out arrangements.

Major_Customers_And_Segment_In1

Major Customers And Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013																		Dec. 31, 2012																Dec. 31, 2011
Segment Reporting [Abstract]	'																		'																'
Revenues Attributed By Geographical Region	'																		'																'
	The following represents the Company’s revenues attributed by geographical region in which services are provided to customers for the years ended December 31 (in thousands):
			2013			2012				2011
	Operating Revenues:
	United States		$	845,056		$	823,693			$	517,120
	Africa, primarily West Africa		79,991			75,484				75,497
	Europe, primarily North Sea		101,834			107,766				79,210
	Asia		26,203			21,039				15,973
	Middle East		51,930			49,941				46,724
	Brazil, Mexico, Central and South America		142,258			229,986				297,536
	Other		—			388				437
			$	1,247,272		$	1,308,297			$	1,032,497
Property And Equipment Based Upon The Assets' Physical Location	'																		'																'
	The Company’s long-lived assets are primarily its property and equipment that are employed in various geographical regions of the world. The following represents the Company’s property and equipment based upon the assets’ physical location as of December 31 (in thousands):
			2013			2012				2011
	Property and Equipment:
	United States		$	1,094,370		$	1,158,038			$	986,404
	Africa, primarily West Africa		73,137			77,860				89,166
	Europe, primarily North Sea		93,713			97,631				96,716
	Asia		21,485			25,305				25,542
	Middle East		61,134			99,863				70,431
	Brazil, Mexico, Central and South America		132,496			126,179				172,398
			$	1,476,335		$	1,584,876			$	1,440,657
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(1)(2) $’000		Other		Corporate		Total				Offshore		Inland		Shipping		ICP		Other		Corporate		Total
			Offshore		Inland			Shipping			ICP(1)(2) $’000		Other		Corporate		Total				Marine		River		Services				$’000		and		$’000				Marine		River		Services		$’000		$’000		and		$’000
			Marine		River			Services					$’000		and		$’000				Services		Services		$’000						Eliminations						Services		Services		$’000						Eliminations
			Services		Services			$’000							Eliminations						$’000		$’000								$’000						$’000		$’000								$’000
			$’000		$’000										$’000				For the year ended December 31, 2012																For the year ended December 31, 2011
	For the year ended December 31, 2013																		Operating Revenues:																Operating Revenues:
	Operating Revenues:																		External customers		519,707		224,409		179,928		188,650		195,603		—		1,308,297		External customers		376,692		187,657		161,307		—		306,841		—		1,032,497
	External customers		567,148		212,726			194,184			193,682		79,532		—		1,247,272
																			Intersegment		110		2,152		108		—		128		(2,498	)	—		Intersegment		96		—		—		—		26		(122	)	—
	Intersegment		115		2,887			—			—		—		(3,002	)	—
																					519,817		226,561		180,036		188,650		195,731		(2,498	)	1,308,297				376,788		187,657		161,307		—		306,867		(122	)	1,032,497
			567,263		215,613			194,184			193,682		79,532		(3,002	)	1,247,272
																			Costs and Expenses:																Costs and Expenses:
	Costs and Expenses:																		Operating		349,680		158,596		112,125		183,442		175,957		(2,331	)	977,469		Operating		269,203		119,499		90,708		—		266,168		(25	)	745,553
	Operating		382,045		152,527			117,283			184,649		75,254		(2,887	)	908,871
																			Administrative and general		59,253		15,924		22,553		1,920		23,824		43,269		166,743		Administrative and general		47,201		11,339		18,301		256		19,370		35,305		131,772
	Administrative and general		60,279		15,410			22,073			2,031		6,296		35,259		141,348
																			Depreciation and amortization		61,542		28,270		30,635		5,757		2,874		2,589		131,667		Depreciation and amortization		48,477		23,494		30,214		—		2,830		1,858		106,873
	Depreciation and amortization		65,424		28,461			31,299			5,797		378		3,159		134,518
																					470,475		202,790		165,313		191,119		202,655		43,527		1,275,879				364,881		154,332		139,223		256		288,368		37,138		984,198
			507,748		196,398			170,655			192,477		81,928		35,531		1,184,737
																			Gains (Losses) on Asset Dispositions and Impairments, Net		14,876		7,666		3,128		—		(1,527	)	(156	)	23,987		Gains (Losses) on Asset Dispositions and Impairments, Net		14,661		2,964		1,355		—		3		(144	)	18,839
	Gains on Asset Dispositions and Impairments, Net		28,664		6,555			240			—		1,907		141		37,507
																			Operating Income (Loss)		64,218		31,437		17,851		(2,469	)	(8,451	)	(46,181	)	56,405		Operating Income (Loss)		26,568		36,289		23,439		(256	)	18,502		(37,404	)	67,138
	Operating Income (Loss)		88,179		25,770			23,769			1,205		(489	)	(38,392	)	100,042
																			Other Income (Expense):																Other Income (Expense):
	Other Income (Expense):																		Derivative gains (losses), net		(243	)	—		—		(856	)	910		(2,623	)	(2,812	)	Derivative losses, net		—		—		—		—		(980	)	(29,075	)	(30,055	)
	Derivative gains (losses), net		83		—			—			(2,078	)	210		(6,538	)	(8,323	)
																			Foreign currency gains, net		1,077		84		6		—		2		462		1,631		Foreign currency gains (losses), net		(3,102	)	—		(30	)	—		277		3,395		540
	Foreign currency losses, net		(2,209	)	(167	)		(14	)		—		(342	)	(619	)	(3,351	)
																			Other, net		2		(1	)	7,452		—		—		(305	)	7,148		Other, net		278		4		307		—		950		(521	)	1,018
	Other, net		3		—			760			—		12		(189	)	586
																			Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		5,214		(3,310	)	(4,148	)	6,154		(9,674	)	—		(5,764	)	Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		9,189		4,136		(74	)	(1,815	)	(1,528	)	—		9,908
	Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		13,522		(7,626	)		(2,945	)		—		4,313		—		7,264
																			Segment Profit (Loss)		70,268		28,210		21,161		2,829		(17,213	)					Segment Profit (Loss)		32,933		40,429		23,642		(2,071	)	17,221
	Segment Profit (Loss)		99,578		17,977			21,570			(873	)	3,704
																			Other Income (Expense) not included in Segment Profit														(7,800	)	Other Income (Expense) not included in Segment Profit														(34,872	)
	Other Income (Expense) not included in Segment Profit																(21,322	)	Less Equity Losses included in Segment Profit														5,764		Less Equity Earnings included in Segment Profit														(9,908	)
	Less Equity Earnings included in Segment Profit																(7,264	)																	Income Before Taxes, Equity Earnings and Discontinued Operations														3,769
	Income Before Taxes, Equity Earnings and Discontinued Operations																67,632		Income Before Taxes, Equity Earnings and Discontinued Operations														54,572
																																			Capital Expenditures of Continuing Operations		88,248		44,693		24,308		—		4,972		3,043		165,264
	Capital Expenditures of Continuing Operations		111,517		37,360			43,713			1,115		385		1,811		195,901		Capital Expenditures of Continuing Operations		168,778		28,818		31,235		96		6,576		3,847		239,350
																																			As of December 31, 2011
	As of December 31, 2013																		As of December 31, 2012																Property and Equipment
	Property and Equipment:																		Property and Equipment:																Historical cost		943,108		474,618		524,398		—		18,610		25,997		1,986,731
	Historical cost		1,139,639		481,421			498,951			44,166		3,967		31,039		2,199,183		Historical cost		1,158,169		491,653		506,054		43,789		8,276		30,442		2,238,383
																																			Accumulated depreciation		(372,213	)	(104,768	)	(175,978	)	—		(3,002	)	(9,592	)	(665,553	)
	Accumulated depreciation		(471,590	)	(147,698	)		(223,667	)		(11,390	)	(662	)	(11,323	)	(866,330	)	Accumulated depreciation		(422,564	)	(127,112	)	(198,943	)	(5,679	)	(398	)	(9,107	)	(763,803	)
			668,049		333,723			275,284			32,776		3,305		19,716		1,332,853				735,605		364,541		307,111		38,110		7,878		21,335		1,474,580				570,895		369,850		348,420		—		15,608		16,405		1,321,178
	Construction in progress		102,452		28,855			11,324			738		113		—		143,482		Construction in progress		66,088		11,122		29,972		—		3,040		74		110,296		Construction in progress		83,924		13,442		18,055		—		314		3,744		119,479
			770,501		362,578			286,608			33,514		3,418		19,716		1,476,335		Property and Equipment		801,693		375,663		337,083		38,110		10,918		21,409		1,584,876				654,819		383,292		366,475		—		15,922		20,149		1,440,657
	Investments, at Equity, and Advances to 50% or Less Owned Companies		99,160		55,411			197,145			—		89,137		—		440,853		Investments, at Equity, and Advances to 50% or Less Owned Companies		66,805		53,844		67,023		—		84,863		—		272,535		Investments, at Equity, and Advances to 50% or Less Owned Companies		68,330		50,183		12,284		11,790		56,903		—		199,490
	Inventories		6,315		2,279			1,329			16,172		1,520		—		27,615		Inventories		6,779		2,623		1,728		11,770		2,887		—		25,787		Inventories		6,449		2,422		1,671		—		2,416		—		12,958
	Goodwill		13,367		2,766			1,852			—		—		—		17,985		Goodwill		13,367		2,759		1,852		—		—		—		17,978		Goodwill		13,367		4,345		1,852		—		37,138		—		56,702
	Intangible Assets		3,650		7,568			859			7		339		—		12,423		Intangible Assets		4,086		9,214		1,410		93		502		—		15,305		Intangible Assets		5,971		7,324		1,945		—		6,288		—		21,528
	Other current and long-term assets, excluding cash and near cash assets(3)		149,239		69,267			15,097			5,409		47,584		28,785		315,381		Other current and long-term assets, excluding cash and near cash assets(3)		139,757		75,661		14,183		6,533		72,123		33,393		341,650		Other current and long-term assets, excluding cash and near cash assets(1)		125,472		72,565		14,131		8		137,008		29,014		378,198
	Segment Assets		1,042,232		499,869			502,890			55,102		141,998						Segment Assets		1,032,487		519,764		423,279		56,506		171,293						Segment Assets		874,408		520,131		398,358		11,798		255,675
	Cash and near cash assets(3)																825,641		Cash and near cash assets(3)														493,786		Cash and near cash assets(1)														729,635
	Total Assets																3,116,233		Discontinued operations														948,877		Discontinued operations														1,088,966
	______________________																		Total Assets														3,700,794		Total Assets														3,928,134
	-1	Operating revenues includes $189.5 million of tangible product sales and operating expenses includes $180.5 million of costs of goods sold.																	______________________																______________________
	-2	Inventories include raw materials of $1.8 million and work in process of $1.8 million.																	-1	Operating revenues includes $184.9 million of tangible product sales and operating expenses includes $185.1 million of costs of goods sold.															-1	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.
-3	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.																	-2	Inventories include raw materials of $2.4 million and work in process of $1.8 million.
																		-3	Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities, construction reserve funds and Title XI reserve funds.

Discountinued_Operations_Disco1

Discountinued Operations Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Summarized selected operating results of the discontinued operations for the years ended December 31 were as follows (in thousands):
		2013			2012			2011
	SES Business
	Operating Revenues	$	—		$	22,387		$	131,346
	Costs and Expenses:
	Operating	—			18,234			90,267
	Administrative and general	—			4,624			20,674
	Depreciation and amortization	—			1,428			7,332
		—			24,286			118,273
	Losses on Asset Dispositions	—			(71		)	(61		)
	Operating Income (Loss)	—			(1,970		)	13,012
	Other Income (Expense), Net (including gain on sale of business)	(1,537		)	24,971			203
	Income Tax (Expense), Net	538			(6,342		)	(5,659		)
	Equity in Earnings (Losses) of 50% or Less Owned Companies	—			301			(49		)
	Net Income (Loss)	$	(999	)	$	16,960		$	7,507
	SEI
	Operating Revenues	$	—		$	515,468		$	731,164
	Costs and Expenses:
	Operating	—			503,294			720,791
	Administrative and general	—			5,579			3,290
	Depreciation and amortization	—			(3		)	7
		—			508,870			724,088
	Operating Income	—			6,598			7,076
	Other Income (Expense), Net (including gain on sale of business)	(143		)	8,083			(5,335		)
	Income Tax (Expense), Net	50			(4,856		)	(913		)
	Net Income (Loss)	$	(93	)	$	9,825		$	828
	Era Group
	Operating Revenues	$	22,892		$	272,921		$	258,148
	Costs and Expenses:
	Operating	14,076			167,195			162,707
	Administrative and general	2,653			34,785			31,893
	Depreciation and amortization	3,875			42,502			42,612
		20,604			244,482			237,212
	Gains on Asset Dispositions	548			3,612			15,172
	Operating Income	2,836			32,051			36,108
	Other Income (Expense), Net	(1,316		)	(9,478		)	(1,439		)
	Income Tax (Expense), Net	(10,818		)	(7,998		)	(11,303		)
	Equity in Earnings (Losses) of 50% or Less Owned Companies	65			(5,528		)	82
	Net Income	$	(9,233	)	$	9,047		$	23,448
	Eliminations
	Operating Revenues	$	—		$	(109,941	)	$	(11,213	)
	Costs and Expenses:
	Operating	—			(109,938		)	(11,131		)
	Administrative and general	—			(3		)	(82		)
		—			(109,941		)	(11,213		)
	Operating Income	$	—		$	—		$	—

Supplemental_Information_For_S1

Supplemental Information For Statements Of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Cash Flow Supplemental Information	'
	Supplemental information for the years ended December 31 was as follows (in thousands):
		2013		2012		2011
	Income taxes paid	$	4,285	$	24,378	$	8,398
	Income taxes refunded	2,739		11,317		2,499
	Interest paid, excluding capitalized interest	32,388		46,457		39,559
	Schedule of Non-Cash Investing and Financing Activities:
	Distribution of Era Group stock to shareholders	415,209		—		—
	Marketable securities reclassified to investment in Trailer Bridge	—		48,064		—
	(see Note 5)
	Company financed sale of vessels	10,263		48,848		11,889
	Contribution of assets to 50% or less owned companies	—		15,123		12,361
	Issuance of Common Stock on Windcat Acquisition (See Note 4)	—		585		—
	Contribution of assets from noncontrolling interests	—		—		124

Quarterly_Financial_Informatio1

Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly Financial Information	'
		Three Months Ended
		Dec. 31,			Sept. 30,		June 30,			March 31,			March 31,
	2013									(As Restated)(1)			(As Reported)(1)
	Operating Revenues	$	327,861		$	336,784	$	315,563		$	267,064		$	267,064
	Operating Income	30,307			51,508		19,254			(1,027		)	(1,027		)
	Income (Loss) from Continuing Operations	9,120			30,769		19,296			(11,036		)	(11,036		)
	Loss from Discontinued Operations, Net of Tax	—			—		—			(10,325		)	(211		)
	Net Income (Loss)	9,120			30,769		19,296			(21,361		)	(10,874		)
	Net Income (Loss) attributable to SEACOR Holdings Inc.:
	Continuing Operations	$	8,396		$	30,291	$	19,271		$	(10,763	)	$	(10,763	)
	Discontinued Operations	—			—		—			(10,225		)	(111		)
		$	8,396		$	30,291	$	19,271		$	(20,988	)	$	(10,874	)
	Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations	$	0.42		$	1.52	$	0.97		$	(0.55	)	$	(0.55	)
	Discontinued Operations	—			—		—			(0.51		)	—
		$	0.42		$	1.52	$	0.97		$	(1.06	)	$	(0.55	)
	Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations	$	0.41		$	1.36	$	0.91		$	(0.55	)	$	(0.55	)
	Discontinued Operations	—			—		—			(0.51		)	—
		$	0.41		$	1.36	$	0.91		$	(1.06	)	$	(0.55	)
		Three Months Ended
		Dec. 31,			Sept. 30,		June 30,			March 31,
	2012
	Operating Revenues	$	362,368		$	338,855	$	309,225		$	297,849
	Operating Income (Loss)	9,332			20,058		(1,499		)	28,514
	Income (Loss) from Continuing Operations	(12,295		)	9,239		6,495			21,188
	Income from Discontinued Operations, Net of Tax	9,578			6,265		4,804			15,185
	Net Income (Loss)	(2,717		)	15,504		11,299			36,373
	Net Income (Loss) attributable to SEACOR Holdings Inc.:
	Continuing Operations	$	(12,242	)	$	9,837	$	6,445		$	21,303
	Discontinued Operations	9,618			6,265		4,804			15,185
		$	(2,624	)	$	16,102	$	11,249		$	36,488
	Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations	$	(0.61	)	$	0.48	$	0.31		$	1.04
	Discontinued Operations	0.48			0.31		0.24			0.74
		$	(0.13	)	$	0.79	$	0.55		$	1.78
	Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.:
	Continuing Operations	$	(0.61	)	$	0.47	$	0.31		$	1.02
	Discontinued Operations	0.48			0.31		0.23			0.73
		$	(0.13	)	$	0.78	$	0.54		$	1.75

Nature_Of_Operations_And_Accou3

Nature Of Operations And Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Deferred Revenue	$6,592,000	$6,592,000	$9,845,000	$20,829,000
Inventory write-down	200,000	200,000	300,000	'
Depreciation	130,200,000	126,100,000	102,100,000	'
Capitalized interest	6,400,000	4,300,000	5,800,000	'
Amortization expense	4,349,000	5,629,000	4,800,000	'
Asset Impairment Charges	3,000,000	1,200,000	100,000	'
Amortization expense for deferred financing costs.	1,900,000	500,000	500,000	'
Offshore Marine Services [Member]	'	'	'	'
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Deferred Revenue	6,600,000	'	'	'
Percentage of Operating Revenues	45.00%	40.00%	36.00%	'
Inland River Services [Member]	'	'	'	'
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Percentage of Operating Revenues	17.00%	17.00%	18.00%	'
Shipping Services [Member]	'	'	'	'
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Percentage of Operating Revenues	16.00%	14.00%	16.00%	'
Ethanol and Industrial Alcohol [Member]	'	'	'	'
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Percentage of Operating Revenues	16.00%	14.00%	'	'
ORM Transaction	'	'	'	'
Nature of Operations and Accounting Policies [Line Items]	'	'	'	'
Goodwill, Other Changes	'	$37,100,000	'	'

Nature_Of_Operations_And_Accou4

Nature Of Operations And Accounting Policies (Deferred Revenues Included In Other Current Liabilities) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Nature Of Operations And Accounting Policies [Abstract]	'	'	'
Balance at beginning of period	$6,592	$9,845	$20,829
Revenues deferred during the period	0	3,806	7,402
Revenues recognized during the period	0	-7,059	-18,386
Balance at end of period	$6,592	$6,592	$9,845

Nature_Of_Operations_And_Accou5

Nature Of Operations And Accounting Policies (Schedule Of Property And Equipment By Major Classes) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	$2,199,183	$2,238,383	'
Accumulated Depreciation	-866,330	-763,803	'
Property, Plant and Equipment, Net In Service	1,332,853	1,474,580	'
Net property and equipment	1,476,335	1,584,876	1,440,657
Offshore Support Vessels [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	1,047,119	1,074,170	'
Accumulated Depreciation	-438,528	-398,050	'
Net property and equipment	608,591	676,120	'
Wind Farm Utility Vessel [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	65,094	58,484	'
Accumulated Depreciation	-14,121	-6,887	'
Net property and equipment	50,973	51,597	'
Inland River Dry Cargo And Deck Barges [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	241,210	239,896	'
Accumulated Depreciation	-80,772	-70,407	'
Net property and equipment	160,438	169,489	'
Inland River Liquid Tank Barges [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	85,639	106,541	'
Accumulated Depreciation	-18,138	-18,605	'
Net property and equipment	67,501	87,936	'
Inland River Towboats [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	61,407	53,895	'
Accumulated Depreciation	-22,454	-20,054	'
Net property and equipment	38,953	33,841	'
U.S.-flag Product Tankers [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	318,497	317,894	'
Accumulated Depreciation	-173,278	-154,288	'
Net property and equipment	145,219	163,606	'
R O R O Vessels [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	18,328	15,674	'
Accumulated Depreciation	-3,995	-2,492	'
Net property and equipment	14,333	13,182	'
Harbor Tugs [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	101,762	114,974	'
Accumulated Depreciation	-34,017	-32,965	'
Net property and equipment	67,745	82,009	'
Ocean Liquid Tank Barge [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	39,238	39,073	'
Accumulated Depreciation	-7,335	-5,914	'
Net property and equipment	31,903	33,159	'
Terminal And Manufacturing Facilities [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	120,601	120,164	'
Accumulated Depreciation	-33,594	-20,906	'
Net property and equipment	87,007	99,258	'
Equipment Furniture Fixtures Vehicles And Other [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and Equipment, Gross	100,288	97,618	'
Accumulated Depreciation	-40,098	-33,235	'
Net property and equipment	$60,190	$64,383	'

Nature_Of_Operations_And_Accou6

Nature Of Operations And Accounting Policies (Schedule Of Intangible Assets) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	$43,426	$52,764	'
Acquired intangible assets	1,599	4,057	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	-132	152	'
Fully amortized intangible assets	-5,209	-561	'
Intangible Assets, Gross, Ending Balance	39,684	43,426	52,764
Accumulated Amortization, Beginning Balance	28,121	31,236	'
Amortization expense	4,349	5,629	4,800
Fully amortized intangible assets, Accumulated Amortization	5,209	561	'
Accumulated Amortization, Ending Balance	27,261	28,121	31,236
Weighted average remaining contractual life, in years	'5 years 1 month 17 days	'	'
Non-Compete Agreements	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	40	901	'
Acquired intangible assets	0	0	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	0	0	'
Fully amortized intangible assets	0	-561	'
Intangible Assets, Gross, Ending Balance	40	40	'
Accumulated Amortization, Beginning Balance	25	719	'
Amortization expense	8	135	'
Fully amortized intangible assets, Accumulated Amortization	0	561	'
Accumulated Amortization, Ending Balance	33	25	'
Weighted average remaining contractual life, in years	'11 months 1 day	'	'
Trademark/Tradenames	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	8,424	9,136	'
Acquired intangible assets	74	0	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	0	0	'
Fully amortized intangible assets	-437	0	'
Intangible Assets, Gross, Ending Balance	8,061	8,424	'
Accumulated Amortization, Beginning Balance	3,983	3,722	'
Amortization expense	984	611	'
Fully amortized intangible assets, Accumulated Amortization	437	0	'
Accumulated Amortization, Ending Balance	4,530	3,983	'
Weighted average remaining contractual life, in years	'6 years 5 months 1 day	'	'
Customer Relationships	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	26,587	36,350	'
Acquired intangible assets	1,525	1,621	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	0	0	'
Fully amortized intangible assets	0	0	'
Intangible Assets, Gross, Ending Balance	28,112	26,587	'
Accumulated Amortization, Beginning Balance	19,014	22,476	'
Amortization expense	2,454	3,739	'
Fully amortized intangible assets, Accumulated Amortization	0	0	'
Accumulated Amortization, Ending Balance	21,468	19,014	'
Weighted average remaining contractual life, in years	'4 years 9 months 14 days	'	'
Software/Technology	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	0	590	'
Acquired intangible assets	0	0	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	0	0	'
Fully amortized intangible assets	'	0	'
Intangible Assets, Gross, Ending Balance	0	0	'
Accumulated Amortization, Beginning Balance	0	246	'
Amortization expense	0	118	'
Fully amortized intangible assets, Accumulated Amortization	0	0	'
Accumulated Amortization, Ending Balance	0	0	'
Weighted average remaining contractual life, in years	'0 years	'	'
Acquired Contractual Rights	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible Assets, Gross, Beginning Balance	8,375	5,787	'
Acquired intangible assets	0	2,436	'
Finite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	-132	152	'
Fully amortized intangible assets	-4,772	0	'
Intangible Assets, Gross, Ending Balance	3,471	8,375	'
Accumulated Amortization, Beginning Balance	5,099	4,073	'
Amortization expense	903	1,026	'
Fully amortized intangible assets, Accumulated Amortization	4,772	0	'
Accumulated Amortization, Ending Balance	1,230	5,099	'
Weighted average remaining contractual life, in years	'4 years 1 month 6 days	'	'
ORM Transaction	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	-12,986	'
Disposal of Intangible Assets, Accumulated Amortization	'	8,183	'
ORM Transaction | Non-Compete Agreements	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	-300	'
Disposal of Intangible Assets, Accumulated Amortization	'	268	'
ORM Transaction | Trademark/Tradenames	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	-712	'
Disposal of Intangible Assets, Accumulated Amortization	'	350	'
ORM Transaction | Customer Relationships	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	-11,384	'
Disposal of Intangible Assets, Accumulated Amortization	'	7,201	'
ORM Transaction | Software/Technology	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	-590	'
Disposal of Intangible Assets, Accumulated Amortization	'	364	'
ORM Transaction | Acquired Contractual Rights	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Disposal of Intangible Assets	'	0	'
Disposal of Intangible Assets, Accumulated Amortization	'	$0	'

Nature_Of_Operations_And_Accou7

Nature Of Operations And Accounting Policies (Schedule Of Future Amortization Expense Of Intangible Assets) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]	'
2014	$3,579
2015	2,410
2016	1,385
2017	1,251
2018	989
Years subsequent to 2018	2,809
Total	$12,423

Nature_Of_Operations_And_Accou8

Nature Of Operations And Accounting Policies (Schedule Of Deferred Gain Activity) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Sale Leaseback and Financed Equipment Sales	'	'	'
Deferred Revenue Arrangement [Line Items]	'	'	'
Balance at beginning of period	$96,447	$101,155	$113,871
Deferred gains arising from vessel sales	26,881	23,183	12,319
Amortization of deferred gains included in operating expenses as a reduction to rental expense	10,687	16,652	22,191
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net	2,099	11,239	2,834
Reductions of deferred gains on repurchased vessels and other	0	0	10
Balance at end of period	110,542	96,447	101,155
Fifty Percent Or Less Owned Subsidiaries	'	'	'
Deferred Revenue Arrangement [Line Items]	'	'	'
Balance at beginning of period	15,066	16,036	16,881
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net	845	970	845
Balance at end of period	$14,221	$15,066	$16,036

Nature_Of_Operations_And_Accou9

Nature Of Operations And Accounting Policies (Schedule Of Earnings Per Share) (Details) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

In Thousands, except Share data, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Mar. 31, 2013

Dec. 11, 2012

Dec. 31, 2013

Nov. 13, 2013

Deferred Compensation, Share-based Payments [Member]

Deferred Compensation, Share-based Payments [Member]

Deferred Compensation, Share-based Payments [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Three Point Zero Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income attributable to SEACOR Holdings Inc.

$8,396

$30,291

$19,271

($20,988)

'

$16,102

$11,249

$36,488

$36,970

$61,215

$41,056

'

'

'

'

'

'

'

'

'

'

'

Dilutive Securities, Effect on Basic Earnings Per Share

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

'

'

Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Net Income (Loss) Available to Common Stockholders, Diluted

'

'

'

'

'

'

'

'

$36,970

$61,215

$41,056

'

'

'

'

'

'

'

'

'

'

'

Average o/s Shares, Basic

'

'

'

'

'

'

'

'

19,893,954

20,426,770

21,119,461

'

'

'

'

'

'

'

'

'

'

'

Incremental Common Shares Attributable to Share-based Payment Arrangements

'

'

'

'

'

'

'

'

399,333

349,126

347,382

'

'

'

'

'

'

'

'

'

'

'

Convertible Securities

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

4,200,525

'

1,825,326

'

Average o/s Shares, Diluted

'

'

'

'

'

'

'

'

20,293,287

20,775,896

21,466,843

'

'

'

'

'

'

'

'

'

'

'

Per Share, Basic

$0.42

$1.52

$0.97

($1.06)

($0.13)

$0.79

$0.55

$1.78

$1.86

$3

$1.94

'

'

'

'

'

'

'

'

'

'

'

Per Share, Diluted

$0.41

$1.36

$0.91

($1.06)

($0.13)

$0.78

$0.54

$1.75

$1.82

$2.95

$1.91

'

'

'

'

'

'

'

'

'

'

'

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

'

'

'

'

'

'

'

'

4,200,525

176,609

'

'

'

'

133,315

549,223

338,920

240,043

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

'

3.00%

Recovered_Sheet1

Nature Of Operations And Accounting Policies Nature Of Operations And Accounting Policies (Schedule of Accumulated Other Comprehensive Income (Loss))(Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss), Net of Tax	($1,192)	($1,986)	($7,958)	($7,039)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,306	9,188	-1,413	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-457	-3,216	494	'
Other Comprehensive Income (Loss), before Tax	1,385	9,617	-1,531	'
Other Comprehensive Income (Loss), Tax	457	3,216	-494	'
Other Comprehensive Income (Loss), Net of Tax	928	6,401	-1,037	'
Accumulated Translation Adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-927	-1,238	-4,404	-3,995
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	563	4,871	-629	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-197	-1,705	220	'
Stockholders' Equity Note, Spinoff Transaction	-55	'	'	'
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-257	-732	-3,518	-2,933
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	731	4,286	-900	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-256	-1,500	315	'
Stockholders' Equity Note, Spinoff Transaction	0	'	'	'
Other Postretirement Benefit Plans, Defined Benefit [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-8	-16	-36	-111
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	12	31	116	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-4	-11	-41	'
Stockholders' Equity Note, Spinoff Transaction	0	'	'	'
Non-Controlling Interests In Subsidiaries [Member]	'	'	'	'
Other Comprehensive Income (Loss), Net of Tax	-79	429	-118	'
Stockholders' Equity Note, Spinoff Transaction	-107	'	'	'
Non-Controlling Interests In Subsidiaries [Member] | Accumulated Translation Adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	395	321	-118	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Noncontrolling Interest	74	439	-118	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Noncontrolling Interest	0	0	0	'
Stockholders' Equity Note, Spinoff Transaction	0	'	'	'
Non-Controlling Interests In Subsidiaries [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-5	-10	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Noncontrolling Interest	5	-10	0	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Noncontrolling Interest	0	0	0	'
Stockholders' Equity Note, Spinoff Transaction	0	'	'	'
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'
Other Comprehensive Income (Loss), Net of Tax	-849	5,972	-919	'
Stockholders' Equity Note, Spinoff Transaction	($55)	'	'	'

Fair_Value_Measurements_Financ

Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Dividend income (expense), net on marketable securities	($200,000)	($500,000)	($800,000)
Interest income, net on marketable securities	'	200,000	2,800,000
Fair Value, Inputs, Level 1 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Marketable securities	24,292,000	'	21,688,000
Derivative instruments (included in other receivables)	185,000	'	2,840,000
Construction reserve funds and Title XI reserve funds	'	'	195,629,000
Short sales of marketable securities	10,697,000	'	8,277,000
Derivative instruments (included in other current liabilities)	1,511,000	'	840,000
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)	6,072,000	'	4,696,000
Construction reserve funds and Title XI reserve funds	0	'	0
Short sales of marketable securities	0	'	0
Derivative instruments (included in other current liabilities)	1,828,000	'	6,140,000
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 and Title XI reserve funds	0	'	0
Short sales of marketable securities	0	'	0
Derivative instruments (included in other current liabilities)	0	'	0
Marketable Security Positions Held By The Company As Of December 31, 2013 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Marketable security gains (losses), net include losses	5,800,000	-700,000	-7,500,000
Marketable Security Positions Held By The Company As Of December 31, 2012 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Marketable security gains (losses), net include losses	'	($900,000)	($7,700,000)

Fair_Value_Measurements_Estima

Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 11, 2012	Nov. 13, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified			Two Point Five Percentage Convertible Notes [Member]	Three Point Zero Percentage Convertible Notes [Member]	Fair Value, Inputs, Level 1 [Member]	Fair Value, Inputs, Level 1 [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	2.50%	3.00%	'	'	'	'	'	'
Cash, Cash Equivalents and Restricted Cash	$539,610	$276,489	'	'	'	'	'	'	'	'
Cash, Cash Equivalents and Restricted Cash, Fair Value Disclosure	'	'	'	'	539,610	276,489	0	0	0	0
Investment Owned, at Cost	9,315	9,315	'	'	'	'	'	'	'	'
Notes, Loans and Financing Receivable, Gross, Noncurrent	13,544	26,063	'	'	'	'	'	'	'	'
Debt, Long-term and Short-term, Combined Amount	879,441	677,229	'	'	'	'	'	'	'	'
Long-term Debt, Fair Value	'	'	'	'	$0	$0	$1,094,193	$747,973	$0	$0

Fair_Value_Measurements_NonFin

Fair Value Measurements (Non-Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Asset Impairment Charges	$3,000,000	$1,200,000	$100,000
U.S.-flag Harbor Tugs [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Asset Impairment Charges	3,000,000	'	'
Fair Value, Inputs, Level 1 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets Held-for-sale, Long Lived	17,494,000	0	'
Fair Value, Inputs, Level 1 [Member] | C-Lift LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	0	'	'
Fair Value, Inputs, Level 1 [Member] | Dorian LPG [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	0	'	'
Fair Value, Inputs, Level 1 [Member] | Zhuhai SEACOR/Avion Logistics Company Limited [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	0	'	'
Fair Value, Inputs, Level 1 [Member] | Illinois Corn Processing LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	0	'
Fair Value, Inputs, Level 1 [Member] | Witt O'Brien's LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	0	'
Fair Value, Inputs, Level 2 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets Held-for-sale, Long Lived	0	8,400,000	'
Fair Value, Inputs, Level 2 [Member] | C-Lift LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	13,290,000	'	'
Fair Value, Inputs, Level 2 [Member] | Dorian LPG [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	14,989,000	'	'
Fair Value, Inputs, Level 2 [Member] | Zhuhai SEACOR/Avion Logistics Company Limited [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	924,000	'	'
Fair Value, Inputs, Level 2 [Member] | Illinois Corn Processing LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	30,916,000	'
Fair Value, Inputs, Level 2 [Member] | Witt O'Brien's LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	50,261,000	'
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	0	'
Fair Value, Inputs, Level 3 [Member] | C-Lift LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	0	'	'
Fair Value, Inputs, Level 3 [Member] | Dorian LPG [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity Method Investments, Fair Value Disclosure	0	'	'
Fair Value, Inputs, Level 3 [Member] | Zhuhai SEACOR/Avion Logistics Company Limited [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	0	'	'
Fair Value, Inputs, Level 3 [Member] | Illinois Corn Processing LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	0	'
Fair Value, Inputs, Level 3 [Member] | Witt O'Brien's LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Investment in affiliates (included in Investments, at Equity, and Advances to 50% or Less Owned Companies)	'	$0	'

Derivative_Instruments_And_Hed2

Derivative Instruments And Hedging Strategies (Narrative) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Offshore Marine Services Joint Ventures [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	$16.80
Fixed interest rate	1.48%
Inland River Joint Venture [Member] | Cash Flow Hedging [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	28.6
Inland River Joint Venture [Member] | Minimum [Member]	'
Derivative [Line Items]	'
Fixed interest rate	1.53%
Inland River Joint Venture [Member] | Maximum [Member]	'
Derivative [Line Items]	'
Fixed interest rate	4.16%
Shipping Services Joint Ventures [Member]	'
Derivative [Line Items]	'
Fixed interest rate	2.79%
Shipping Services Joint Ventures [Member] | Cash Flow Hedging [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	37.3
Not Designated as Hedging Instrument [Member] | Forward Currency Exchange, Option And Future Contracts [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	25.9
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	88.2
Fixed interest rate range, start	2.25%
Fixed interest rate range, end	3.05%
Not Designated as Hedging Instrument [Member] | Offshore Marine Services Joint Ventures [Member] | Interest Rate Swap [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	103.1
Fixed interest rate	1.30%
Not Designated as Hedging Instrument [Member] | Shipping Services Joint Ventures [Member] | Cash Flow Hedging [Member]	'
Derivative [Line Items]	'
Fixed interest rate range, start	2.96%
Fixed interest rate range, end	5.40%
Not Designated as Hedging Instrument [Member] | Shipping Services Joint Ventures [Member] | Interest Rate Swap [Member]	'
Derivative [Line Items]	'
Derivative, Notional Amount	$130.70

Derivative_Instruments_And_Hed3

Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	$6,257	$7,536
Derivative Liability	3,339	6,980
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	0	0
Derivative Liability	1,615	5,884
Commodity Swap, Option And Future Contracts, Exchange Traded [Member] | Not Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	185	2,826
Derivative Liability	1,504	736
Commodity Swap, Option And Future Contracts, Non-Exchange Traded [Member] | Not Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	5,499	4,348
Derivative Liability	0	199
Options On Equities And Equity Indices [Member] | Not Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	224	351
Derivative Liability	7	1
Forward Currency Exchange, Option And Future Contracts [Member] | Not Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset	349	11
Derivative Liability	$213	$160

Derivative_Instruments_And_Hed4

Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Designated As Cash Flow Hedges) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	$622	$2,724	$3,632
Gains (Losses) on derivative instruments designated as cash flow hedges, Other comprehensive income (loss)	731	4,286	-900
Interest rate swap agreements, ineffective portion, Derivative gains (losses), net	0	-58	-46
Derivative Gains (Losses) [Member]	'	'	'
Derivative [Line Items]	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	3,272	0
Interest Expense [Member]	'	'	'
Derivative [Line Items]	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	2,000	2,867
Interest Rate Swap [Member]	'	'	'
Derivative [Line Items]	'	'	'
Interest rate swap agreements, effective portion, Other comprehensive income (loss)	$109	($1,710)	($4,532)

Derivative_Instruments_And_Hed5

Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	($8,323)	($2,754)	($30,009)
Options On Equities And Equity Indices [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	-5,270	-680	1,693
U.S. Treasury Notes, Rate Locks And Bond Future And Option Contracts [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	0	0	-28,301
Forward Currency Exchange, Option And Future Contracts [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	-451	837	-621
Interest Rate Swap [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	-37	-3,778	-1,103
Commodity Swap, Option And Future Contracts, Exchange Traded [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	-3,915	-1,020	-2,008
Commodity Swap, Option And Future Contracts, Non-Exchange Traded [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative gains (losses), net	$1,350	$1,887	$331

Acquisitions_And_Dispositions_1

Acquisitions And Dispositions (Narrative) (Details) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Jun. 06, 2013

Jun. 06, 2013

Dec. 31, 2012

Jun. 25, 2012

Dec. 31, 2012

Mar. 30, 2012

Dec. 31, 2012

Feb. 01, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 22, 2011

Dec. 22, 2011

Dec. 31, 2011

Dec. 21, 2011

Dec. 31, 2011

Jul. 29, 2011

Dec. 31, 2011

Apr. 13, 2011

Dec. 31, 2011

Dec. 01, 2009

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Offshore Support Vessels Anchor Handling Towing Supply [Member]

Offshore Support Vessels Anchor Handling Towing Supply [Member]

Liftboats [Member]

Offshore Support Vessels [Member]

Inland River Liquid Tank Barges [Member]

Harbor Tugs [Member]

Harbor Tugs [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

C-Lift LLC [Member]

C-Lift LLC [Member]

C-Lift LLC [Member]

Pantagro Acquisition [Member]

Pantagro Acquisition [Member]

Superior Liftboats [Member]

Superior Liftboats [Member]

ICP Acquisition [Member]

ICP Acquisition [Member]

Lewis & Clark Acquisition [Member]

Windcat Acquisition [Member]

Windcat Acquisition [Member]

Windcat Acquisition [Member]

Windcat Acquisition [Member]

Naviera Acquisition [Member]

Naviera Acquisition [Member]

Soylutions Acquisition [Member]

Soylutions Acquisition [Member]

G & G Shipping Acquisition [Member]

G & G Shipping Acquisition [Member]

PIER Acquisition [Member]

PIER Acquisition [Member]

Offshore Marine Services Joint Ventures [Member]

Offshore Marine Services Joint Ventures [Member]

Offshore Marine Services Joint Ventures [Member]

Offshore Marine Services Joint Ventures [Member]

Common Stock [Member]

Gains on Asset Dispositions and Impariments, Net [Member]

Gains on Asset Dispositions and Impariments, Net [Member]

Gains on Asset Dispositions and Impariments, Net [Member]

Liftboats [Member]

Liftboats [Member]

Wind Farm Utility Vessel [Member]

R O R O Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Windcat Acquisition [Member]

equipment

equipment

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Controlling interest obtained

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

95.00%

'

'

'

70.00%

'

'

'

75.00%

'

'

70.00%

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

Cash paid on acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$13,300,000

'

'

$200,000

'

$142,500,000

'

$9,100,000

'

$29,600,000

'

$21,500,000

'

'

$1,900,000

'

$11,900,000

'

$30,300,000

'

'

'

'

'

'

'

'

'

'

'

Number Of Equipments Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

18

'

'

'

'

'

'

29

'

'

'

'

'

8

'

'

'

'

'

'

'

'

'

'

Business Combination, Consideration Transferred

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

'

'

'

22,100,000

'

'

'

'

'

'

33,500,000

'

'

'

'

'

'

'

'

'

'

'

Purchase consideration, note receivable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,200,000

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Cost of Acquired Entity, Equity Interests Issued and Issuable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

600,000

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000

'

'

6,374

'

'

'

Common Stock, Par or Stated Value Per Share

$0.01

$0.01

$0.01

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, Acquired During Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

600,000

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,300,000

'

'

'

'

'

'

'

'

Maximum additional consideration received by selling partner

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

700,000

'

'

'

'

'

'

'

'

Business Acquisition, Additional Consideration Paid to Acquired Entity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

600,000

'

'

'

'

'

'

'

'

'

Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

Business acquisition additional consideration earned by acquired entity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

800,000

'

'

'

'

'

'

'

'

'

Sales Price Of Equipment

274,300,000

167,500,000

81,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

263,900,000

114,000,000

70,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Secured Debt

10,400,000

48,500,000

7,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

48,900,000

7,600,000

'

'

'

'

'

'

Gain (Loss) on Disposition of Property Plant Equipment

64,500,000

36,200,000

27,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500,000

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

37,600,000

13,000,000

15,200,000

Deferred gains on asset sales

26,900,000

23,200,000

12,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,300,000

4,600,000

'

'

'

'

Sale Leaseback Transaction, Description of Asset(s)

'

'

'

'2

'1

'1

'

'8

'7

'2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale Leaseback Transaction, Net Proceeds

116,300,000

84,500,000

36,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale Leaseback Transaction, Lease Terms

'

'

'84

'

'

'

'

'

'

'

'60

'48

'120

'96

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale Leaseback Transaction, Deferred Gain, Net

26,400,000

15,700,000

7,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,900,000

12,200,000

3,700,000

Payments for (Proceeds from) Other Deposits

'

$5,000,000

$2,500,000

'

'

'

$5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, Plant and Equipment, Dispositions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2

'1

'

'

'

'

Acquisitions_And_Dispositions_2

Acquisitions And Dispositions (Allocation Of Purchase Price For Business Acquisitions) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$3,250,000	$17,356,000	$2,882,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	32,000	16,282,000	1,105,000
Business Acquisition, Purchase Price Allocation, Equity Method Investment	-13,290,000	-42,358,000	-11,920,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	43,521,000	178,025,000	137,533,000
Goodwill, Gross	0	-1,586,000	3,264,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,599,000	4,057,000	6,602,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	0	-332,000	3,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	264,000	4,701,000	3,060,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,053,000	4,093,000	518,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	22,668,000	946,000	37,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	0	0	-1,116,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0	166,000	0
Business Acquisition, Purchase Price Allocation, Accumulated Other Comprehensive Income (Loss)	0	-9,000	0
Noncontrolling Interests in Subsidiaries	0	13,459,000	10,284,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	11,127,000	148,088,000	90,588,000
Cash Acquired from Acquisition	$2,200,000	$3,700,000	$5,300,000

Acquisitions_And_Dispositions_3

Acquisitions And Dispositions (Major Equipment Deliveries) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Payments to Acquire Property, Plant, and Equipment	$195,901	$239,350	$165,264
Offshore Support Vessels Anchor Handling Towing Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Offshore Support Vessels Crew [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Offshore Support Vessels Mini-Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Offshore Support Vessels Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Offshore Support Vessels Specialty [Member]	'	'	'
Number Of Equipments Delivered	2	0	0
Wind Farm Utility Vessel [Member]	'	'	'
Number Of Equipments Delivered	5	1	0
Offshore Support Vessels [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Inland River Dry Cargo And Deck Barges [Member]	'	'	'
Number Of Equipments Delivered	0	3	55
Inland River Liquid Tank Barges [Member]	'	'	'
Number Of Equipments Delivered	2	5	2
Inland River Towboats [Member]	'	'	'
Number Of Equipments Delivered	1	2	0
R O R O Vessels [Member]	'	'	'
Number Of Equipments Delivered	1	0	0
Azimuth Drive Harbor Tugs [Member]	'	'	'
Number Of Equipments Delivered	4	0	1
Windcat Acquisition [Member] | Wind Farm Utility Vessel [Member]	'	'	'
Number Of Equipments Delivered	'	'	28
C-Lift LLC [Member] | Liftboats [Member]	'	'	'
Number Of Equipments Delivered	2	'	'
Superior Energy Services Llc [Member] | Liftboats [Member]	'	'	'
Number Of Equipments Delivered	'	18	'
G & G Shipping Acquisition [Member] | R O R O Vessels [Member]	'	'	'
Number Of Equipments Delivered	'	'	8

Acquisitions_And_Dispositions_4

Acquisitions And Dispositions (Major Equipment Dispositions) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	equipment	equipment	equipment
Offshore Support Vessels Anchor Handling Towing Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Number of equipments removed from service	0	2	1
Offshore Support Vessels Crew [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Number of equipments removed from service	5	2	6
Offshore Support Vessels Mini-Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Number of equipments removed from service	1	0	0
Offshore Support Vessels Mini-Supply [Member] | Excluded from Equipment Disposition Table [Member]	'	'	'
Number of equipments removed from service	'	'	1
Offshore Support Vessels Standby Safety [Member]	'	'	'
Number of equipments removed from service	0	1	1
Offshore Support Vessels Supply [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Number of equipments removed from service	2	2	1
Offshore Support Vessels Towing Supply [Member]	'	'	'
Number of equipments removed from service	0	0	1
Offshore Support Vessels Specialty [Member]	'	'	'
Number Of Equipments Delivered	2	0	0
Number of equipments removed from service	3	0	1
Liftboats [Member]	'	'	'
Number of equipments removed from service	6	0	0
Wind Farm Utility Vessel [Member]	'	'	'
Number Of Equipments Delivered	5	1	0
Number of equipments removed from service	2	0	0
Offshore Support Vessels [Member]	'	'	'
Number Of Equipments Delivered	0	0	0
Number of equipments removed from service	19	7	11
Inland River Dry Cargo And Deck Barges [Member]	'	'	'
Number Of Equipments Delivered	0	3	55
Number of equipments removed from service	16	9	6
Inland River Liquid Tank Barges [Member]	'	'	'
Number Of Equipments Delivered	2	5	2
Number of equipments removed from service	8	1	1
Inland River Towboats [Member]	'	'	'
Number Of Equipments Delivered	1	2	0
Number of equipments removed from service	0	2	1
U S Flag Tankers [Member]	'	'	'
Number of equipments removed from service	0	0	1
R O R O Vessels [Member]	'	'	'
Number Of Equipments Delivered	1	0	0
Number of equipments removed from service	0	1	0
Azimuth Drive Harbor Tugs [Member]	'	'	'
Number Of Equipments Delivered	4	0	1
Number of equipments removed from service	7	3	1
Coventional Drive Harbor Tugs [Member]	'	'	'
Number of equipments removed from service	1	2	1
Harbor Tugs [Member]	'	'	'
Number of equipments removed from service	8	5	2
SeaJon [Member] | U.S. Flag Articulated Tug-Barge [Member] | Excluded from Equipment Disposition Table [Member]	'	'	'
Number of equipments removed from service	'	1	'
MexMar [Member] | Offshore Support Vessels Crew [Member] | Excluded from Equipment Disposition Table [Member]	'	'	'
Number of equipments removed from service	'	'	4
MexMar [Member] | Offshore Support Vessels [Member]	'	'	'
Number Of Equipments Delivered	1	'	'

Investments_At_Equity_And_Adva2

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

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2011

Feb. 06, 2014

Nov. 18, 2013

Jul. 25, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Apr. 02, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Jun. 01, 2011

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 01, 2012

Nov. 20, 2009

Dec. 31, 2011

Jun. 01, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2011

Jul. 29, 2011

Dec. 31, 2013

Jun. 06, 2013

Dec. 31, 2012

Feb. 01, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Mar. 31, 2013

Dec. 31, 2011

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Apr. 02, 2012

Dec. 31, 2013

Dec. 31, 2013

MexMar [Member]

MexMar [Member]

MexMar [Member]

MexMar [Member]

Sea-Cat Crewzer II [Member]

Sea-Cat Crewzer II [Member]

Sea-Cat Crewzer II [Member]

Sea-Cat Crewzer II [Member]

Dynamic Offshore Drilling Ltd. [Member]

Dynamic Offshore Drilling Ltd. [Member]

Dynamic Offshore Drilling Ltd. [Member]

Sea Cat Crewzer [Member]

Sea Cat Crewzer [Member]

Sea Cat Crewzer [Member]

Sea Cat Crewzer [Member]

Nautical Power [Member]

Nautical Power [Member]

OSV Partners [Member]

OSV Partners [Member]

OSV Partners [Member]

OSV Partners [Member]

C-Lift LLC [Member]

C-Lift LLC [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

SCFCo Holdings [Member]

SCFCo Holdings [Member]

SCFCo Holdings [Member]

SCFCo Holdings [Member]

Bunge-SCF Grain [Member]

Bunge-SCF Grain [Member]

Bunge-SCF Grain [Member]

SCF Bunge Marine [Member]

SCF Bunge Marine [Member]

SCF Bunge Marine [Member]

SCF Bunge Marine [Member]

Soylutions [Member]

Other Inland River Joint Ventures [Member]

Other Inland River Joint Ventures [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Trailer Bridge Inc [Member]

Trailer Bridge Inc [Member]

Trailer Bridge Inc [Member]

Trailer Bridge Inc [Member]

SeaJon [Member]

SeaJon [Member]

Witt O'Brien's LLC [Member]

Witt O'Brien's LLC [Member]

Hawker Pacific Airservices Limited [Member]

Hawker Pacific Airservices Limited [Member]

Hawker Pacific Airservices Limited [Member]

Hawker Pacific Airservices Limited [Member]

Avion Pacific Limited [Member]

Avion Pacific Limited [Member]

Avion Pacific Limited [Member]

Avion Pacific Limited [Member]

Other Corporate Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Illinois Corn Processing LLC [Member]

Illinois Corn Processing LLC [Member]

Illinois Corn Processing LLC [Member]

Illinois Corn Processing LLC [Member]

Avion Logistics Limited [Member]

Avion Logistics Limited [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Soylutions Acquisition [Member]

Soylutions Acquisition [Member]

C-Lift LLC [Member]

C-Lift LLC [Member]

ICP Acquisition [Member]

ICP Acquisition [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Offshore Support Vessels [Member]

Very Large Gas Carrier [Member]

Title XI Bonds [Member]

Title XI Bonds [Member]

Title XI Bonds [Member]

Owned [Member]

Bareboat Chartered-In [Member]

equipment

equipment

equipment

Other Offshore Marine Services Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

equipment

equipment

equipment

MexMar [Member]

Sea-Cat Crewzer II [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Dorian LPG [Member]

Trailer Bridge Inc [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

equipment

equipment

equipment

equipment

equipment

equipment

equipment

Schedule Of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current Fiscal Year End Date

'--12-31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cumulative undistributed net earnings of 50% or less owned companies accounted for by the equity method included in the Company's consolidated retained earnings

'

$23,900,000

$24,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of Equipment Operated

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6

'

'

'

'

'

10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9

1

Document Period End Date

31-Dec-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Revenues from Transactions with Related Party

6,600,000

44,800,000

'

300,000

300,000

100,000

'

200,000

'

'

'

'

'

'

'

800,000

800,000

800,000

'

'

'

'

200,000

'

'

'

600,000

600,000

'

600,000

'

'

'

'

'

1,000,000

1,000,000

300,000

'

40,800,000

40,900,000

41,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends received from 50% or less owned companies

9,490,000

6,606,000

8,346,000

'

'

'

'

'

'

'

'

'

'

'

1,300,000

'

'

'

5,300,000

'

'

'

'

'

'

'

900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number Of Equipments Delivered

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

1

2

'

'

'

'

'

'

'

'

Bridge Loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Marketable security gains (losses), net

5,803,000

12,891,000

-7,893,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Final Baloon Payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

29,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

100.00%

'

50.00%

'

70.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Preexisting Relationship, Gain (Loss) Recognized

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,100,000

'

'

'

'

'

'

'

'

'

9,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

6,000,000

'

'

'

'

'

'

'

'

'

2,300,000

'

4,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash paid on acquisition

'

'

'

'

'

17,100,000

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

11,900,000

'

13,300,000

'

9,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain/(loss) due to adjustments to equity method investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

49.00%

'

'

'

'

50.00%

'

'

'

19.00%

'

'

50.00%

'

'

50.00%

'

'

'

30.40%

'

50.00%

'

'

'

'

'

'

'

50.00%

'

'

50.00%

'

'

'

50.00%

'

'

'

'

50.00%

21.80%

'

19.30%

21.80%

25.00%

'

'

'

47.30%

47.26%

50.00%

'

50.00%

'

'

34.20%

'

34.20%

'

'

'

39.10%

'

'

'

'

'

'

'

'

'

20.00%

34.00%

'

50.00%

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds From Property And Equipment Sales To Fifty Percent Or Less Owned Companies

'

'

'

36,400,000

50,000,000

'

'

'

47,300,000

'

'

'

'

'

'

'

'

'

'

'

'

14,500,000

'

'

'

'

'

'

5,400,000

7,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investments

440,853,000

272,535,000

'

28,564,000

18,162,000

'

'

'

22,900,000

'

0

'

11,622,000

10,483,000

'

7,833,000

7,183,000

'

6,399,000

11,060,000

'

'

3,951,000

0

0

5,445,000

'

'

17,891,000

'

14,472,000

'

27,710,000

25,351,000

'

17,697,000

19,315,000

'

'

6,158,000

5,604,000

'

'

3,574,000

3,846,000

129,785,000

'

'

'

'

0

'

60,224,000

57,881,000

9,900,000

9,479,000

6,799,000

52,289,000

50,261,000

'

21,596,000

23,004,000

'

'

11,152,000

'

13,127,000

'

446,000

2,125,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquired economic interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

54.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, stated percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9.25%

'

'

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.50%

'

'

'

'

Deconsolidation, Gain (Loss), Amount

'

'

'

'

'

8,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional ownership acquired percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.70%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Temporary working capital advances provided

'

'

'

1,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,600,000

'

'

'

'

'

'

'

'

3,100,000

'

'

'

2,500,000

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Temporary Working Capital Advances Repaid during the Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-1,800,000

'

'

-500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Distributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

'

'

'

'

'

'

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded Unconditional Purchase Obligation, Maximum Quantity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

16

'

'

'

'

'

'

2

'

'

'

'

'

Outstanding temporary working capital advances

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revolving line of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Received repayments of line of credit

'

'

'

'

'

-14,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-2,100,000

-1,100,000

'

'

'

'

'

'

'

'

'

'

-1,000,000

-15,700,000

-4,600,000

'

'

'

'

'

-1,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes Receivable, Related Parties

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

4,000,000

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advances made under revolving line of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

4,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Contributions

'

'

'

5,900,000

'

'

'

'

23,900,000

'

'

'

'

'

'

'

'

'

'

'

4,100,000

'

'

'

'

'

2,100,000

'

'

'

'

6,100,000

'

3,000,000

800,000

'

'

17,300,000

'

'

'

'

'

'

'

57,000,000

70,400,000

'

'

'

'

'

'

'

'

1,400,000

'

'

'

'

'

'

'

'

'

'

'

700,000

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding borrowings under term loan

834,118,000

655,309,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

85,217,000

90,733,000

5,100,000

'

'

Contribution of an equity interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Guarantor Obligations, Maximum Exposure, Undiscounted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan outstanding to distributor

834,118,000

655,309,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

85,217,000

90,733,000

5,100,000

'

'

Allocable share of uncalled capital

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number Of Equipments Sold

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

1

'

'

'

'

'

'

Guarantee of outstanding charter receivables

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advanced to joint ventures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,300,000

'

'

11,000,000

9,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related party transaction expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,800,000

2,200,000

2,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

42,600,000

41,100,000

'

42,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Acquire Machinery and Equipment

'

'

'

30,400,000

5,000,000

'

'

'

44,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

45,000,000

'

6,000,000

'

'

2,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

33,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt, Repayments

'

'

'

6,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investments, Inclusive of Secured Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

48,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment Owned, at Fair Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

43,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Contributions, Cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

42,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Contributions, Noncash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$14,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investments_At_Equity_And_Adva3

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

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Feb. 06, 2014

Dec. 31, 2013

Nov. 18, 2013

Jul. 25, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Apr. 02, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 01, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

MexMar [Member]

MexMar [Member]

Sea-Cat Crewzer II [Member]

Sea-Cat Crewzer II [Member]

Dynamic Offshore Drilling Ltd. [Member]

Dynamic Offshore Drilling Ltd. [Member]

Sea Cat Crewzer [Member]

Sea Cat Crewzer [Member]

Nautical Power [Member]

Nautical Power [Member]

OSV Partners [Member]

OSV Partners [Member]

C-Lift LLC [Member]

C-Lift LLC [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Other Offshore Marine Services Joint Ventures [Member]

Offshore Marine Services Joint Ventures [Member]

Offshore Marine Services Joint Ventures [Member]

SCFCo Holdings [Member]

SCFCo Holdings [Member]

Bunge-SCF Grain [Member]

Bunge-SCF Grain [Member]

SCF Bunge Marine [Member]

SCF Bunge Marine [Member]

Other Inland River Joint Ventures [Member]

Other Inland River Joint Ventures [Member]

Inland River Joint Venture [Member]

Inland River Joint Venture [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Dorian LPG [Member]

Trailer Bridge Inc [Member]

Trailer Bridge Inc [Member]

Trailer Bridge Inc [Member]

SeaJon [Member]

SeaJon [Member]

Shipping Services Joint Ventures [Member]

Shipping Services Joint Ventures [Member]

Witt O'Brien's LLC [Member]

Witt O'Brien's LLC [Member]

Hawker Pacific Airservices Limited [Member]

Hawker Pacific Airservices Limited [Member]

Hawker Pacific Airservices Limited [Member]

Avion Pacific Limited [Member]

Avion Pacific Limited [Member]

Other Corporate Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Other Corporate Joint Ventures [Member]

Corporate Joint Venture [Member]

Corporate Joint Venture [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Schedule Of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current Fiscal Year End Date

'--12-31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership of equity interest

'

'

49.00%

'

50.00%

'

19.00%

'

50.00%

'

50.00%

'

30.40%

'

50.00%

'

'

'

20.00%

50.00%

'

'

50.00%

'

50.00%

'

50.00%

'

50.00%

'

'

'

19.30%

21.80%

21.80%

25.00%

'

47.30%

'

47.26%

50.00%

'

'

'

50.00%

'

34.20%

'

34.20%

39.10%

'

'

'

34.00%

50.00%

'

'

Equity Method Investments

$440,853

$272,535

$28,564

$18,162

$22,900

$0

$11,622

$10,483

$7,833

$7,183

$6,399

$11,060

$3,951

$0

$0

$5,445

$17,891

$14,472

'

'

$99,160

$66,805

$27,710

$25,351

$17,697

$19,315

$6,158

$5,604

$3,846

$3,574

$55,411

$53,844

'

$129,785

'

'

$0

$57,881

$60,224

$9,900

$9,479

$6,799

$197,145

$67,023

$52,289

$50,261

$21,596

$23,004

'

$13,127

$11,152

$2,125

$446

'

'

$89,137

$84,863

Acquired economic interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

54.20%

'

'

'

'

'

'

'

'

'

'

'

'

Investments_At_Equity_And_Adva4

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Summarized Financial Information For The Company's Investments, At Equity) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity Method Investment, Summarized Financial Information [Abstract]	'	'	'
Current Fiscal Year End Date	'--12-31	'	'
Current assets	$749,369	$458,758	'
Noncurrent assets	1,387,601	726,034	'
Current liabilities	345,260	371,597	'
Noncurrent liabilities	682,348	371,550	'
Operating Revenues	1,087,637	774,912	691,189
Costs and Expenses: Operating and administrative	955,583	699,061	643,612
Costs and Expenses: Depreciation	61,813	40,440	29,859
Total costs and expenses	1,017,396	739,501	673,471
Gain (Loss) on Asset Dispositions	-397	0	0
Operating Income	69,844	35,411	17,718
Net Income (Loss)	$17,312	$4,640	($3,252)

Third_Party_Notes_Receivable_D

Third Party Notes Receivable (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Third Party Notes Receivable [Abstract]	'	'	'
Loans and Leases Receivable, Gross	$14.50	$30.60	'
Notes receivable third party	-20.5	-4.1	-42.6
Proceeds from Collection of Notes Receivable	33.3	36.8	6.8
Proceeds from Collection of Lease Receivables	$3.60	$3.40	$9

Construction_Reserve_Funds_Det

Construction Reserve Funds (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Construction Reserve Funds [Abstract]	'	'	'
Penalty tax rate	1.10%	'	'
Construction reserve fund	$252,100,000	$186,000,000	'
Withdrawals	65,493,000	122,695,000	82,553,000
Deposits	131,603,000	58,350,000	18,642,000
Construction reserve fund benefit	$66,110,000	($64,345,000)	($63,911,000)

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Tax Credit Carryforward [Line Items]	'	'	'
Cumulative undistributed net earnings of foreign subsidiaries included in retained earnings	$120.40	'	'
Valuation Allowance, Deferred Tax Asset, Change in Amount	'	3.1	'
Adjustment to additional paid in capital, income tax effect from share-based compensation, net	1.4	2	1.8
State and Local Jurisdiction [Member]	'	'	'
Tax Credit Carryforward [Line Items]	'	'	'
State net operating loss carryforwards, valuation allowance	$6.80	$6	'

Income_Taxes_Schedule_Of_Incom

Income Taxes (Schedule Of Income Before Income Tax Expense (Benefit) And Equity In Earnings Of 50% Or Less Owned Companies) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]	'	'	'
Income Before Income Tax Expense and Equity In Earnings of 50% or Less Owned Companies	$67,632	$54,572	$3,769
United States [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Income Before Income Tax Expense and Equity In Earnings of 50% or Less Owned Companies	71,669	82,383	14,556
Foreign [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Income Before Income Tax Expense and Equity In Earnings of 50% or Less Owned Companies	-7,596	-176	-5,886
Eliminations And Other [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Income Before Income Tax Expense and Equity In Earnings of 50% or Less Owned Companies	$3,559	($27,635)	($4,901)

Income_Taxes_Components_Of_Inc

Income Taxes (Components Of Income Tax Expense (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]	'	'	'
State	$1,723	$3,604	$2,814
Federal	6,311	36,057	18,715
Foreign	8,142	7,921	9,040
Current Income Tax Expense (Benefit), Total	16,176	47,582	30,569
State	-985	-40	-615
Federal	11,532	-23,572	-26,569
Foreign	24	211	-75
Deferred Income Tax Expense (Benefit), Total	10,571	-23,401	-27,259
Income Tax Expense (Benefit)	$26,747	$24,181	$3,310

Income_Taxes_Schedule_Of_Effec

Income Taxes (Schedule Of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effective Income Tax Rate Reconciliation, Percent [Abstract]	'	'	'
Statutory rate	35.00%	35.00%	35.00%
Non-deductible expenses	0.40%	6.10%	4.90%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	0.00%	-5.50%	0.00%
Effective Income Tax Rate Reconciliation, Deductions, Other	5.10%	4.20%	17.20%
State taxes	0.20%	4.20%	32.20%
Other	-1.10%	0.30%	-1.50%
Effective Income Tax Rate	39.60%	44.30%	87.80%

Income_Taxes_Components_Of_The

Income Taxes (Components Of The Net Deferred Income Tax Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of Deferred Tax Assets and Liabilities [Abstract]	'	'
Property and Equipment	$343,411	$328,355
Long-term Debt	56,587	36,864
Unremitted earnings of foreign subsidiaries	40,321	41,382
Investments in 50% or Less Owned Companies	23,573	24,392
Other	9,050	7,235
Total deferred tax liabilities	472,942	438,228
Share award plans	8,347	6,920
Other	13,662	14,801
Total deferred tax assets	22,009	21,721
Valuation allowance	6,778	5,990
Net deferred tax assets	15,231	15,731
Net deferred tax liabilities	$457,711	$422,497

LongTerm_Debt_Narrative_Senior

Long-Term Debt (Narrative) (Senior Notes And Convertible Debentures) (Details) (USD $)

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Nov. 13, 2013

Dec. 31, 2012

Nov. 13, 2013

Dec. 31, 2012

Dec. 15, 2012

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 11, 2012

Dec. 11, 2012

Dec. 31, 2013

Sep. 24, 2009

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Oct. 01, 2002

Dec. 31, 2012

Dec. 31, 2011

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

7.375% Senior Notes [Member]

7.375% Senior Notes [Member]

Title XI Bonds [Member]

Title XI Bonds [Member]

Other Debt Obligations [Member]

Other Debt Obligations [Member]

Other Debt Obligations [Member]

5.875% Senior Notes [Member]

5.875% Senior Notes [Member]

5.875% Senior Notes [Member]

Seacor Revolving Credit Facility [Member]

Seacor Revolving Credit Facility [Member]

Additional Paid-In Capital [Member]

Additional Paid-In Capital [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Unamortized Discount

$99,839,000

$61,011,000

'

$47,770,257

'

'

'

'

'

'

'

$40,442,031

'

'

$1,041,777

'

$9,265,586

'

$728,339

'

'

'

'

'

'

'

Debt instrument, stated percentage

'

'

'

'

3.00%

'

'

'

'

'

'

'

2.50%

'

'

7.38%

6.50%

'

'

'

'

'

'

5.88%

'

'

Proceeds from issuance of long-term debt, net of offering costs

'

'

'

223,700,000

'

'

'

'

'

'

340,600,000

'

'

'

'

'

'

'

1,500,000

6,700,000

23,000,000

'

'

'

'

'

Repayments of Other Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,700,000

24,500,000

28,700,000

'

'

'

'

'

Bond Redemption Percentage

'

'

'

100.00%

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption Premium

'

'

'

'

'

'

'

'

'

'

55

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments of Debt Issuance Costs

'

'

'

6,300,000

'

'

'

'

'

'

9,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contingent Interest Rate

'

'

'

'

0.45%

'

'

'

'

'

'

'

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate principal amount

'

'

'

'

230,000,000

'

'

'

'

'

'

'

350,000,000

'

'

250,000,000

'

'

'

'

'

'

'

200,000,000

'

'

Aggregate purchase price of senior notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,700,000

2,300,000

'

'

'

Debt extinguishment gains (losses), net

0

-160,000

-99,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000

100,000

'

'

'

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.10%

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

Repayments of Long-term Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

171,000,000

'

'

'

'

Extinguishment of Debt, Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,500,000

2,200,000

'

'

'

Net assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

60,700,000

'

'

'

'

'

'

'

'

'

Net property and equipment

1,476,335,000

1,584,876,000

1,440,657,000

'

'

'

'

'

'

'

'

'

'

'

'

'

119,800,000

'

'

'

'

'

'

'

'

'

Letters of credit outstanding amount

27,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Bond Trading Price Triggering Contingent Interest, Minimum

'

'

'

1,200

'

'

'

'

'

'

1,200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Individual Bond, Face Value

'

'

'

'

1,000

'

'

'

'

'

'

'

1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible Securities

0

0

'

1,825,326

'

'

'

'

'

4,200,525

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Convertible, Conversion Ratio

'

'

'

7.9362

'

'

'

9.2089

8.6879

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger

'

'

'

'

'

'

'

'

'

'

130.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock Sales Price Premium Over Conversion Price, Minimum

'

'

'

'

'

'

'

'

'

'

130.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible Debt

'

'

'

230,000,000

181,500,000

0

'

350,000,000

'

'

350,000,000

350,000,000

300,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Finance Costs, Gross

'

'

'

'

5,000,000

'

1,300,000

'

'

'

'

'

8,100,000

1,300,000

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Effective Percentage

'

'

'

'

7.40%

'

'

6.50%

'

'

6.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Convertible, Carrying Amount of Equity Component

'

'

'

'

48,500,000

'

'

'

'

'

'

'

'

49,600,000

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Lines of Credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000,000

'

Proceeds from Lines of Credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50,000,000

Bond Reserve Fund Balance

9,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$12,200,000

$27,300,000

'

'

'

'

'

'

'

'

LongTerm_Debt_Schedule_Of_Comp

Long-Term Debt (Schedule Of Company's Borrowings) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Nov. 13, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 11, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

7.375% Senior Notes [Member]

7.375% Senior Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Three Point Zero Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Two Point Five Percentage Convertible Notes [Member]

Title XI Bonds [Member]

Title XI Bonds [Member]

Other Debt Obligations [Member]

Other Debt Obligations [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible Debt

'

'

'

'

$230,000,000

$181,500,000

$0

$350,000,000

$350,000,000

$300,400,000

'

'

'

'

Senior Notes, Noncurrent

'

'

233,500,000

233,500,000

'

'

'

'

'

'

'

'

'

'

Long-term Debt

834,118,000

655,309,000

'

'

'

'

'

'

'

'

85,217,000

90,733,000

80,563,000

64,007,000

Long-term Debt, Gross

979,280,000

738,240,000

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months

45,323,000

21,920,000

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Unamortized Discount

($99,839,000)

($61,011,000)

($1,041,777)

'

($47,770,257)

'

'

($40,442,031)

'

'

($9,265,586)

'

($728,339)

'

LongTerm_Debt_Schedule_Of_Long

Long-Term Debt (Schedule Of Long-Term Debt Maturities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Long-term Debt, Unclassified [Abstract]	'	'
2014	$45,323	$21,920
2015	18,791	'
2016	13,711	'
2017	14,119	'
2018	14,404	'
Years subsequent to 2018	872,932	'
Long-term Debt, Gross	$979,280	$738,240

Common_Stock_Details

Common Stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Repurchase Program [Line Items]	'	'	'
Treasury stock, shares acquired	'	1,377,798	843,400
Treasury Stock, Value, Acquired, Cost Method	'	$119,600,000	$71,300,000
Repurchase program, remaining authorized repurchase amount	100,000,000	'	'
Common Stock, Dividends, Per Share, Cash Paid	$0	$5	$0
Special Cash Dividend	0	100,385,000	0
Outstanding common shares receiving dividends	'	20,076,762	'
Restricted Stock [Member]	'	'	'
Stock Repurchase Program [Line Items]	'	'	'
Outstanding common shares receiving dividends	'	171,562	'
Dividends, Cash	'	$900,000	'

Savings_Plans_And_Multiemploye1

Savings Plans And Multiemployer Pension Plans (Details)

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2010

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Seacor Savings Plan [Member]

Seacor Savings Plan [Member]

Seacor Savings Plan [Member]

SEACOR Deferred Compensation Plan [Member]

SEACOR Deferred Compensation Plan [Member]

MNOPF [member]

MNOPF [member]

MNRPF [Member]

MNRPF [Member]

MNRPF [Member]

MNRPF [Member]

MNRPF [Member]

MNRPF [Member]

MNRPF [Member]

AMOPP [Member]

AMOPP [Member]

AMOPP [Member]

SPP [Member]

SPP [Member]

SPP [Member]

Defined Contribution Pension [Member]

Defined Contribution Pension [Member]

Defined Contribution Pension [Member]

Deferred Bonus [Member]

Restricted Stock [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

USD ($)

GBP (£)

USD ($)

GBP (£)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

SEACOR Deferred Compensation Plan [Member]

SEACOR Deferred Compensation Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum plan contribution as a percentage of total contribution

50.00%

'

'

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

100.00%

Maximum Employee Contribution Rate Attracting and Employer Match

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Savings plan costs

$2.20

$3.30

$3.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred compensation obligation

'

'

'

0.6

0.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pension and other postretirement benefit expense

'

'

'

'

'

2.7

16.7

0.4

'

'

'

'

'

'

'

'

'

'

'

'

0.5

0.4

0.3

'

'

Pension and other postretirement benefit plans, total funding deficit

'

'

'

'

'

'

'

'

359.3

217

'

'

281

175

'

'

'

'

'

'

'

'

'

'

'

Pension and Other Postretirement Benefit Plans, Allocated Share of Funding Deficit

'

'

'

'

'

'

'

'

'

'

0.3

0.2

1

0.6

'

'

'

'

'

'

'

'

'

'

'

Pension and Other Postretirement Benefit Contributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.9

0.9

0.9

1.5

1.3

0.6

'

'

'

'

'

Pension and other postretirement benefit plans, withdrawal liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$45.60

'

'

'

'

'

'

'

'

'

'

Share_Based_Compensation_Narra

Share Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Common stock authorized for grant under the Share Incentive Plans	5,650,000	'	'
Exercise price per share of options granted, percentage, minimum	100.00%	'	'
Additional compensation expense	$14.50	$33.30	$21.90
Unrecognized compensation costs	27.4	'	'
Compensation costs expected to be recognized in 2013	10	'	'
Compensation costs expected to be recognized in 2014	8.3	'	'
Weighted average values of grants	$43.74	$58.22	$56.57
Weighted average expected volatility	30.47%	31.00%	30.70%
Weighted average discount rates	1.53%	0.81%	1.65%
Expected lives	'5 years 11 months 16 days	'5 years 10 months 28 days	'5 years 8 months 23 days
Total grant date fair value of restricted stock and restricted stock units vested	3.7	38.1	1.6
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	3.3	12.2	'
Aggregate intrinsic value of exercised stock options	10.5	7	6.8
Weighted average remaining contractual term for total outstanding stock options	'5 years 11 months 19 days	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term	'4 years 6 months 11 days	'	'
Aggregate intrinsic value of options outstanding	49.3	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$33.80	'	'
Common Stock, Dividends, Per Share, Cash Paid	$0	$5	$0
Employee Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Common stock authorized for grant under the Share Incentive Plans	600,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date	85.00%	'	'
Common stock made available for purchase under the Employee Stock Purchase Plans, offering period, months	'6	'	'
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	302,370	180,930	'
Restricted Stock [Member] | Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Restricted stock and restricted stock units vesting period, minimum	'1 year	'	'
Restricted Stock [Member] | Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Restricted stock and restricted stock units vesting period, minimum	'5 years	'	'
Employee Stock Option [Member] | Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Restricted stock and restricted stock units vesting period, minimum	'1 year	'	'
Employee Stock Option [Member] | Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Restricted stock and restricted stock units vesting period, minimum	'5 years	'	'

Share_Based_Compensation_Share

Share Based Compensation (Share Based Compensation Plans) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted stock awards granted	148,300	134,600	183,500	'
Restricted stock awards forfeited	-18,000	-2,120	-4,100	'
Director stock awards granted	2,500	4,000	4,000	'
Shares released from Deferred Compensation Plan	-1,692	0	-63	'
Stock Option, Outstanding as of December 31,	1,281,821	1,272,192	1,130,356	1,481,280
Total Options, Granted, Number of Shares	529,912	173,700	290,960	'
Stock Options, Exercised, Number of Shares	-328,077	-149,781	-146,169	'
Stock Options, Forfeited, Number of Shares	-800	0	-1,920	'
Stock Options, Expired, Number of Shares	-1,576	-14,290	-1,035	'
Stock Issued During Period, Shares, Employee Stock Purchase Plans	31,586	39,980	47,376	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	508,495	1,200,417	538,287	'
Era Group [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Total Options, Granted, Number of Shares	318,012	'	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted Stock, Outstanding Beginning of Period	0	1,130	531	'
Restricted Stock Unit, Granted	0	0	650	'
Restricted Stock Unit, Converted to shares and issued to Deferred Compensation Plan	0	1,130	51	'
Restricted Stock, Outstanding End of Period	0	0	1,130	'

Share_Based_Compensation_Sched

Share Based Compensation (Schedule Of Share-based Compensation, Restricted Stock And Restricted Stock Units Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Restricted Stock, Outstanding End of Period	302,370	180,930	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	148,300	'	'
Vested Number of Shares	-8,860	'	'
Forfeited Number of Shares	-18,000	'	'
Weighted Average Grant Price Nonvested	$92.85	'	$70.61
Granted Weighted Average Grant Price	'	$68.23	'
Vested Weighted Average Grant Price	$72.79	'	'
Forfeited Weighted Average Grant Price	$81.78	'	'
Era Group [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Vested Number of Shares	-4,940	'	'

Share_Based_Compensation_Sched1

Share Based Compensation (Schedule Of Share-based Compensation, Stock Options, Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Option, Outstanding as of December 31,	1,281,821	1,272,192	1,130,356	1,481,280
Stock Options, Granted, Number of Shares	529,912	'	'	'
Total Options, Vested, Number of Shares	0	'	'	'
Stock Options, Exercised, Number of Shares	-328,077	-149,781	-146,169	'
Stock Options, Forfeited, Number of Shares	-800	0	-1,920	'
Stock Options, Expired, Number of Shares	-1,576	-14,290	-1,035	'
Stock Options Weighted Average Exercise Price Outstanding	$68.96	'	'	$57.95
Stock Options, Granted, Weighted Average Exercise Price	$63.19	'	'	'
Total Options, Vested, Weighted Average Exercise Price	$0	'	'	'
Stock Options, Exercised, Weighted Average Exercise Price	$51.17	'	'	'
Stock Options, Forfeited in Period, Weighted Average Exercise Price	$72.84	'	'	'
Total Options, Expired, Weighted Average Exercise Price	$72.04	'	'	'
Nonvested Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Option, Outstanding as of December 31,	533,660	'	'	651,606
Stock Options, Granted, Number of Shares	354,254	'	'	'
Total Options, Vested, Number of Shares	-235,508	'	'	'
Stock Options, Exercised, Number of Shares	0	'	'	'
Stock Options, Forfeited, Number of Shares	-800	'	'	'
Stock Options, Expired, Number of Shares	0	'	'	'
Stock Options Weighted Average Exercise Price Outstanding	$27.72	'	'	$23.36
Stock Options, Granted, Weighted Average Exercise Price	$26.12	'	'	'
Total Options, Vested, Weighted Average Exercise Price	$21.61	'	'	'
Stock Options, Exercised, Weighted Average Exercise Price	$0	'	'	'
Stock Options, Forfeited in Period, Weighted Average Exercise Price	$23.22	'	'	'
Total Options, Expired, Weighted Average Exercise Price	$0	'	'	'
Vested Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Option, Outstanding as of December 31,	748,161	'	'	829,674
Stock Options, Granted, Number of Shares	175,658	'	'	'
Total Options, Vested, Number of Shares	-235,508	'	'	'
Stock Options, Exercised, Number of Shares	-328,077	'	'	'
Stock Options, Forfeited, Number of Shares	0	'	'	'
Stock Options, Expired, Number of Shares	-1,576	'	'	'
Stock Options Weighted Average Exercise Price Outstanding	$63.36	'	'	$50.42
Stock Options, Granted, Weighted Average Exercise Price	$45.64	'	'	'
Total Options, Vested, Weighted Average Exercise Price	$56.62	'	'	'
Stock Options, Exercised, Weighted Average Exercise Price	$51.17	'	'	'
Stock Options, Forfeited in Period, Weighted Average Exercise Price	$0	'	'	'
Total Options, Expired, Weighted Average Exercise Price	$72.04	'	'	'
Era Group [Member] | Nonvested Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Options, Granted, Number of Shares	142,354	'	'	'
Era Group [Member] | Vested Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Options, Granted, Number of Shares	175,658	'	'	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]	'	'	'
Related party transaction, amounts	$0.90	$0.80	$1.10
Management fees	0.2	0.1	0.1
Document Period End Date	31-Dec-13	'	'
Payables to related parties	0.6	0.4	'
Related Party Transaction, Revenues from Transactions with Related Party	6.6	44.8	'
Due from Related Parties, Current	1.8	4.7	'
Maximum [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Related Party Transaction, Revenues from Transactions with Related Party	5	'	'
Era Group [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Related Party Transaction, Revenues from Transactions with Related Party	$5	'	'

Commitments_And_Contingencies_1

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

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2010

Dec. 31, 2010

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2010

Dec. 31, 2010

Offshore Support Vessels [Member]

Inland River Dry Cargo Barges [Member]

Inland River Liquid Tank Barges [Member]

Inland River Towboats [Member]

U.S.-flag Product Tankers [Member]

Azimuth Drive Harbor Tugs [Member]

Other Machinery and Equipment [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Abood Litigation [Member]

HEPACO Litigation [Member]

Wunstell Action [Member]

Master Complaints [Member]

Multi-district Litigation [Member]

Darnell Alexander [Member]

Darnell Alexander [Member]

Abney Litigation [Member]

Prejean [Member]

FLSA Actions [Member]

equipment

equipment

equipment

equipment

equipment

equipment

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

Double Hull Product Tankers [Member]

Double Hull Product Tankers [Member]

claim

plaintiff

plaintiff

claim

claim

claim

claim

claim

equipment

Commitments and Contingencies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded unconditional purchase obligation

$547,000,000

'

'

$112,700,000

$40,200,000

$4,700,000

$4,700,000

$374,100,000

'

$10,600,000

$94,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total unfunded capital commitments

547,000,000

'

'

112,700,000

40,200,000

4,700,000

4,700,000

374,100,000

'

10,600,000

94,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded Unconditional Purchase Obligation, Maximum Quantity

'

'

'

16

80

6

5

3

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year

304,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded Unconditional Purchase Obligation, Due within Two Years

232,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecorded Unconditional Purchase Obligation, Due within Three Years

9,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss Contingency, New Claims Filed, Number

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

174

'

2

1

10

410

117

668

330

3

Loss Contingency, Damages Sought, Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,291,178.92

'

'

'

'

'

'

'

'

Number of equipment leases

'

'

'

22

10

'

'

2

9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale Leaseback Transaction, Lease Terms

'

'

'84

'

'

'

'

'

'

'

'

'

'60

'48

'105

'120

'96

'121

'

'

'

'

'

'

'

'

'

'

Total rental expense for operating leases

$70,900,000

$57,900,000

$44,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments_And_Contingencies_2

Commitments And Contingencies (Future Minimum Payments Under Operating Leases) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Future Minimum Lease Payments [Line Items]	'
Total Minimum Payments, 2014	$43,940
Total Minimum Payments, 2015	41,282
Total Minimum Payments, 2016	36,888
Total Minimum Payments, 2017	34,933
Total Minimum Payments, 2018	33,743
Total Minimum Payments, Years subsequent to 2018	102,920
Non-cancellable Subleases, 2014	-17,345
Non-cancellable Subleases, 2015	-17,345
Non-cancellable Subleases, 2016	-17,392
Non-cancellable Subleases, 2017	-17,345
Non-cancellable Subleases, 2018	-17,345
Non-cancellable Subleases, Years subsequent to 2018	-76,127
Net Minimum Payments, 2014	26,595
Net Minimum Payments, 2015	23,937
Net Minimum Payments, 2016	19,496
Net Minimum Payments, 2017	17,588
Net Minimum Payments, 2018	16,398
Net Minimum Payments, Years subsequent to 2018	$26,793

Major_Customers_And_Segment_In2

Major Customers And Segment Information (Operating Results, Capital Expenditures And Assets By Reportable Segments) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	$327,861,000	$336,784,000	$315,563,000	$267,064,000	$362,368,000	$338,855,000	$309,225,000	$297,849,000	$1,247,272,000	$1,308,297,000	$1,032,497,000
Administrative and general	'	'	'	'	'	'	'	'	141,348,000	166,743,000	131,772,000
Depreciation and amortization	'	'	'	'	'	'	'	'	134,518,000	131,667,000	106,873,000
Total costs and expenses	'	'	'	'	'	'	'	'	1,184,737,000	1,275,879,000	984,198,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	37,507,000	23,987,000	18,839,000
Operating Income (Loss)	30,307,000	51,508,000	19,254,000	-1,027,000	9,332,000	20,058,000	-1,499,000	28,514,000	100,042,000	56,405,000	67,138,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	-8,323,000	-2,812,000	-30,055,000
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-3,351,000	1,631,000	540,000
Other, net	'	'	'	'	'	'	'	'	586,000	7,148,000	1,018,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	7,264,000	-5,764,000	9,908,000
Income Before Income Tax Expense (Benefit) and Equity in Earnings of 50% or Less Owned Companies	'	'	'	'	'	'	'	'	67,632,000	54,572,000	3,769,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	195,901,000	239,350,000	165,264,000
Property, Plant and Equipment, Gross	2,199,183,000	'	'	'	2,238,383,000	'	'	'	2,199,183,000	2,238,383,000	'
Accumulated depreciation	866,330,000	'	'	'	763,803,000	'	'	'	866,330,000	763,803,000	'
Property, Plant and Equipment, Net In Service	1,332,853,000	'	'	'	1,474,580,000	'	'	'	1,332,853,000	1,474,580,000	'
Construction in Progress, Gross	143,482,000	'	'	'	110,296,000	'	'	'	143,482,000	110,296,000	'
Net property and equipment	1,476,335,000	'	'	'	1,584,876,000	'	'	'	1,476,335,000	1,584,876,000	1,440,657,000
Equity Method Investments	440,853,000	'	'	'	272,535,000	'	'	'	440,853,000	272,535,000	'
Inventory, Net	27,615,000	'	'	'	25,787,000	'	'	'	27,615,000	25,787,000	'
Goodwill	17,985,000	'	'	'	17,978,000	'	'	'	17,985,000	17,978,000	'
Intangible Assets, Net	12,423,000	'	'	'	15,305,000	'	'	'	12,423,000	15,305,000	'
Total Assets	3,116,233,000	'	'	'	3,700,794,000	'	'	'	3,116,233,000	3,700,794,000	3,928,134,000
Offshore Marine Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	567,148,000	519,707,000	376,692,000
Inland River Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	212,726,000	224,409,000	187,657,000
Shipping Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	194,184,000	179,928,000	161,307,000
Ethanol and Industrial Alcohol [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	193,682,000	188,650,000	0
Sales Revenue, Goods, Net	'	'	'	'	'	'	'	'	189,500,000	184,900,000	'
Cost of Goods Sold	'	'	'	'	'	'	'	'	180,500,000	185,100,000	'
Inventory, Raw Materials	1,800,000	'	'	'	2,400,000	'	'	'	1,800,000	2,400,000	'
Inventory, Work in Process	1,800,000	'	'	'	1,800,000	'	'	'	1,800,000	1,800,000	'
Other Segments [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	79,532,000	195,603,000	306,841,000
Corporate And Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	0	0
Operating Segments [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	1,247,272,000	1,308,297,000	1,032,497,000
Operating Expenses	'	'	'	'	'	'	'	'	908,871,000	977,469,000	745,553,000
Administrative and general	'	'	'	'	'	'	'	'	141,348,000	166,743,000	131,772,000
Depreciation and amortization	'	'	'	'	'	'	'	'	134,518,000	131,667,000	106,873,000
Total costs and expenses	'	'	'	'	'	'	'	'	1,184,737,000	1,275,879,000	984,198,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	37,507,000	23,987,000	18,839,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	100,042,000	56,405,000	67,138,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	-8,323,000	-2,812,000	-30,055,000
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-3,351,000	1,631,000	540,000
Other, net	'	'	'	'	'	'	'	'	586,000	7,148,000	1,018,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	7,264,000	-5,764,000	9,908,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	195,901,000	239,350,000	165,264,000
Property, Plant and Equipment, Gross	2,199,183,000	'	'	'	2,238,383,000	'	'	'	2,199,183,000	2,238,383,000	1,986,731,000
Accumulated depreciation	866,330,000	'	'	'	763,803,000	'	'	'	866,330,000	763,803,000	665,553,000
Property, Plant and Equipment, Net In Service	1,332,853,000	'	'	'	1,474,580,000	'	'	'	1,332,853,000	1,474,580,000	1,321,178,000
Construction in Progress, Gross	143,482,000	'	'	'	110,296,000	'	'	'	143,482,000	110,296,000	119,479,000
Net property and equipment	1,476,335,000	'	'	'	1,584,876,000	'	'	'	1,476,335,000	1,584,876,000	1,440,657,000
Equity Method Investments	440,853,000	'	'	'	272,535,000	'	'	'	440,853,000	272,535,000	199,490,000
Inventory, Net	27,615,000	'	'	'	25,787,000	'	'	'	27,615,000	25,787,000	12,958,000
Goodwill	17,985,000	'	'	'	17,978,000	'	'	'	17,985,000	17,978,000	56,702,000
Intangible Assets, Net	12,423,000	'	'	'	15,305,000	'	'	'	12,423,000	15,305,000	21,528,000
Other current and long-term assets, excluding cash and near cash assets	315,381,000	'	'	'	341,650,000	'	'	'	315,381,000	341,650,000	378,198,000
Operating Segments [Member] | Offshore Marine Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	567,263,000	519,817,000	376,788,000
Operating Expenses	'	'	'	'	'	'	'	'	382,045,000	349,680,000	269,203,000
Administrative and general	'	'	'	'	'	'	'	'	60,279,000	59,253,000	47,201,000
Depreciation and amortization	'	'	'	'	'	'	'	'	65,424,000	61,542,000	48,477,000
Total costs and expenses	'	'	'	'	'	'	'	'	507,748,000	470,475,000	364,881,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	28,664,000	14,876,000	14,661,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	88,179,000	64,218,000	26,568,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	83,000	-243,000	0
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-2,209,000	1,077,000	-3,102,000
Other, net	'	'	'	'	'	'	'	'	3,000	2,000	278,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	13,522,000	5,214,000	9,189,000
Segment Profit (Loss)	'	'	'	'	'	'	'	'	99,578,000	70,268,000	32,933,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	111,517,000	168,778,000	88,248,000
Property, Plant and Equipment, Gross	1,139,639,000	'	'	'	1,158,169,000	'	'	'	1,139,639,000	1,158,169,000	943,108,000
Accumulated depreciation	471,590,000	'	'	'	422,564,000	'	'	'	471,590,000	422,564,000	372,213,000
Property, Plant and Equipment, Net In Service	668,049,000	'	'	'	735,605,000	'	'	'	668,049,000	735,605,000	570,895,000
Construction in Progress, Gross	102,452,000	'	'	'	66,088,000	'	'	'	102,452,000	66,088,000	83,924,000
Net property and equipment	770,501,000	'	'	'	801,693,000	'	'	'	770,501,000	801,693,000	654,819,000
Equity Method Investments	99,160,000	'	'	'	66,805,000	'	'	'	99,160,000	66,805,000	68,330,000
Inventory, Net	6,315,000	'	'	'	6,779,000	'	'	'	6,315,000	6,779,000	6,449,000
Goodwill	13,367,000	'	'	'	13,367,000	'	'	'	13,367,000	13,367,000	13,367,000
Intangible Assets, Net	3,650,000	'	'	'	4,086,000	'	'	'	3,650,000	4,086,000	5,971,000
Other current and long-term assets, excluding cash and near cash assets	149,239,000	'	'	'	139,757,000	'	'	'	149,239,000	139,757,000	125,472,000
Total Assets	1,042,232,000	'	'	'	1,032,487,000	'	'	'	1,042,232,000	1,032,487,000	874,408,000
Operating Segments [Member] | Inland River Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	215,613,000	226,561,000	187,657,000
Operating Expenses	'	'	'	'	'	'	'	'	152,527,000	158,596,000	119,499,000
Administrative and general	'	'	'	'	'	'	'	'	15,410,000	15,924,000	11,339,000
Depreciation and amortization	'	'	'	'	'	'	'	'	28,461,000	28,270,000	23,494,000
Total costs and expenses	'	'	'	'	'	'	'	'	196,398,000	202,790,000	154,332,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	6,555,000	7,666,000	2,964,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	25,770,000	31,437,000	36,289,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	0	0	0
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-167,000	84,000	0
Other, net	'	'	'	'	'	'	'	'	0	-1,000	4,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	-7,626,000	-3,310,000	4,136,000
Segment Profit (Loss)	'	'	'	'	'	'	'	'	17,977,000	28,210,000	40,429,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	37,360,000	28,818,000	44,693,000
Property, Plant and Equipment, Gross	481,421,000	'	'	'	491,653,000	'	'	'	481,421,000	491,653,000	474,618,000
Accumulated depreciation	147,698,000	'	'	'	127,112,000	'	'	'	147,698,000	127,112,000	104,768,000
Property, Plant and Equipment, Net In Service	333,723,000	'	'	'	364,541,000	'	'	'	333,723,000	364,541,000	369,850,000
Construction in Progress, Gross	28,855,000	'	'	'	11,122,000	'	'	'	28,855,000	11,122,000	13,442,000
Net property and equipment	362,578,000	'	'	'	375,663,000	'	'	'	362,578,000	375,663,000	383,292,000
Equity Method Investments	55,411,000	'	'	'	53,844,000	'	'	'	55,411,000	53,844,000	50,183,000
Inventory, Net	2,279,000	'	'	'	2,623,000	'	'	'	2,279,000	2,623,000	2,422,000
Goodwill	2,766,000	'	'	'	2,759,000	'	'	'	2,766,000	2,759,000	4,345,000
Intangible Assets, Net	7,568,000	'	'	'	9,214,000	'	'	'	7,568,000	9,214,000	7,324,000
Other current and long-term assets, excluding cash and near cash assets	69,267,000	'	'	'	75,661,000	'	'	'	69,267,000	75,661,000	72,565,000
Total Assets	499,869,000	'	'	'	519,764,000	'	'	'	499,869,000	519,764,000	520,131,000
Operating Segments [Member] | Shipping Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	194,184,000	180,036,000	161,307,000
Operating Expenses	'	'	'	'	'	'	'	'	117,283,000	112,125,000	90,708,000
Administrative and general	'	'	'	'	'	'	'	'	22,073,000	22,553,000	18,301,000
Depreciation and amortization	'	'	'	'	'	'	'	'	31,299,000	30,635,000	30,214,000
Total costs and expenses	'	'	'	'	'	'	'	'	170,655,000	165,313,000	139,223,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	240,000	3,128,000	1,355,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	23,769,000	17,851,000	23,439,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	0	0	0
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-14,000	6,000	-30,000
Other, net	'	'	'	'	'	'	'	'	760,000	7,452,000	307,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	-2,945,000	-4,148,000	-74,000
Segment Profit (Loss)	'	'	'	'	'	'	'	'	21,570,000	21,161,000	23,642,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	43,713,000	31,235,000	24,308,000
Property, Plant and Equipment, Gross	498,951,000	'	'	'	506,054,000	'	'	'	498,951,000	506,054,000	524,398,000
Accumulated depreciation	223,667,000	'	'	'	198,943,000	'	'	'	223,667,000	198,943,000	175,978,000
Property, Plant and Equipment, Net In Service	275,284,000	'	'	'	307,111,000	'	'	'	275,284,000	307,111,000	348,420,000
Construction in Progress, Gross	11,324,000	'	'	'	29,972,000	'	'	'	11,324,000	29,972,000	18,055,000
Net property and equipment	286,608,000	'	'	'	337,083,000	'	'	'	286,608,000	337,083,000	366,475,000
Equity Method Investments	197,145,000	'	'	'	67,023,000	'	'	'	197,145,000	67,023,000	12,284,000
Inventory, Net	1,329,000	'	'	'	1,728,000	'	'	'	1,329,000	1,728,000	1,671,000
Goodwill	1,852,000	'	'	'	1,852,000	'	'	'	1,852,000	1,852,000	1,852,000
Intangible Assets, Net	859,000	'	'	'	1,410,000	'	'	'	859,000	1,410,000	1,945,000
Other current and long-term assets, excluding cash and near cash assets	15,097,000	'	'	'	14,183,000	'	'	'	15,097,000	14,183,000	14,131,000
Total Assets	502,890,000	'	'	'	423,279,000	'	'	'	502,890,000	423,279,000	398,358,000
Operating Segments [Member] | Ethanol and Industrial Alcohol [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	193,682,000	188,650,000	0
Operating Expenses	'	'	'	'	'	'	'	'	184,649,000	183,442,000	0
Administrative and general	'	'	'	'	'	'	'	'	2,031,000	1,920,000	256,000
Depreciation and amortization	'	'	'	'	'	'	'	'	5,797,000	5,757,000	0
Total costs and expenses	'	'	'	'	'	'	'	'	192,477,000	191,119,000	256,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	0	0	0
Operating Income (Loss)	'	'	'	'	'	'	'	'	1,205,000	-2,469,000	-256,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	-2,078,000	-856,000	0
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	0	0	0
Other, net	'	'	'	'	'	'	'	'	0	0	0
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	0	6,154,000	-1,815,000
Segment Profit (Loss)	'	'	'	'	'	'	'	'	-873,000	2,829,000	-2,071,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	1,115,000	96,000	0
Property, Plant and Equipment, Gross	44,166,000	'	'	'	43,789,000	'	'	'	44,166,000	43,789,000	0
Accumulated depreciation	11,390,000	'	'	'	5,679,000	'	'	'	11,390,000	5,679,000	0
Property, Plant and Equipment, Net In Service	32,776,000	'	'	'	38,110,000	'	'	'	32,776,000	38,110,000	0
Construction in Progress, Gross	738,000	'	'	'	0	'	'	'	738,000	0	0
Net property and equipment	33,514,000	'	'	'	38,110,000	'	'	'	33,514,000	38,110,000	0
Equity Method Investments	0	'	'	'	0	'	'	'	0	0	11,790,000
Inventory, Net	16,172,000	'	'	'	11,770,000	'	'	'	16,172,000	11,770,000	0
Goodwill	0	'	'	'	0	'	'	'	0	0	0
Intangible Assets, Net	7,000	'	'	'	93,000	'	'	'	7,000	93,000	0
Other current and long-term assets, excluding cash and near cash assets	5,409,000	'	'	'	6,533,000	'	'	'	5,409,000	6,533,000	8,000
Total Assets	55,102,000	'	'	'	56,506,000	'	'	'	55,102,000	56,506,000	11,798,000
Operating Segments [Member] | Other Segments [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	79,532,000	195,731,000	306,867,000
Operating Expenses	'	'	'	'	'	'	'	'	75,254,000	175,957,000	266,168,000
Administrative and general	'	'	'	'	'	'	'	'	6,296,000	23,824,000	19,370,000
Depreciation and amortization	'	'	'	'	'	'	'	'	378,000	2,874,000	2,830,000
Total costs and expenses	'	'	'	'	'	'	'	'	81,928,000	202,655,000	288,368,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	1,907,000	-1,527,000	3,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	-489,000	-8,451,000	18,502,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	210,000	910,000	-980,000
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-342,000	2,000	277,000
Other, net	'	'	'	'	'	'	'	'	12,000	0	950,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	4,313,000	-9,674,000	-1,528,000
Segment Profit (Loss)	'	'	'	'	'	'	'	'	3,704,000	-17,213,000	17,221,000
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	385,000	6,576,000	4,972,000
Property, Plant and Equipment, Gross	3,967,000	'	'	'	8,276,000	'	'	'	3,967,000	8,276,000	18,610,000
Accumulated depreciation	662,000	'	'	'	398,000	'	'	'	662,000	398,000	3,002,000
Property, Plant and Equipment, Net In Service	3,305,000	'	'	'	7,878,000	'	'	'	3,305,000	7,878,000	15,608,000
Construction in Progress, Gross	113,000	'	'	'	3,040,000	'	'	'	113,000	3,040,000	314,000
Net property and equipment	3,418,000	'	'	'	10,918,000	'	'	'	3,418,000	10,918,000	15,922,000
Equity Method Investments	89,137,000	'	'	'	84,863,000	'	'	'	89,137,000	84,863,000	56,903,000
Inventory, Net	1,520,000	'	'	'	2,887,000	'	'	'	1,520,000	2,887,000	2,416,000
Goodwill	0	'	'	'	0	'	'	'	0	0	37,138,000
Intangible Assets, Net	339,000	'	'	'	502,000	'	'	'	339,000	502,000	6,288,000
Other current and long-term assets, excluding cash and near cash assets	47,584,000	'	'	'	72,123,000	'	'	'	47,584,000	72,123,000	137,008,000
Total Assets	141,998,000	'	'	'	171,293,000	'	'	'	141,998,000	171,293,000	255,675,000
Operating Segments [Member] | Corporate And Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	-3,002,000	-2,498,000	-122,000
Operating Expenses	'	'	'	'	'	'	'	'	-2,887,000	-2,331,000	-25,000
Administrative and general	'	'	'	'	'	'	'	'	35,259,000	43,269,000	35,305,000
Depreciation and amortization	'	'	'	'	'	'	'	'	3,159,000	2,589,000	1,858,000
Total costs and expenses	'	'	'	'	'	'	'	'	35,531,000	43,527,000	37,138,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	141,000	-156,000	-144,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	-38,392,000	-46,181,000	-37,404,000
Derivative gains (losses), net	'	'	'	'	'	'	'	'	-6,538,000	-2,623,000	-29,075,000
Foreign currency gains (losses), net	'	'	'	'	'	'	'	'	-619,000	462,000	3,395,000
Other, net	'	'	'	'	'	'	'	'	-189,000	-305,000	-521,000
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	0	0	0
Payments to Acquire Property, Plant, and Equipment	'	'	'	'	'	'	'	'	1,811,000	3,847,000	3,043,000
Property, Plant and Equipment, Gross	31,039,000	'	'	'	30,442,000	'	'	'	31,039,000	30,442,000	25,997,000
Accumulated depreciation	11,323,000	'	'	'	9,107,000	'	'	'	11,323,000	9,107,000	9,592,000
Property, Plant and Equipment, Net In Service	19,716,000	'	'	'	21,335,000	'	'	'	19,716,000	21,335,000	16,405,000
Construction in Progress, Gross	0	'	'	'	74,000	'	'	'	0	74,000	3,744,000
Net property and equipment	19,716,000	'	'	'	21,409,000	'	'	'	19,716,000	21,409,000	20,149,000
Equity Method Investments	0	'	'	'	0	'	'	'	0	0	0
Inventory, Net	0	'	'	'	0	'	'	'	0	0	0
Goodwill	0	'	'	'	0	'	'	'	0	0	0
Intangible Assets, Net	0	'	'	'	0	'	'	'	0	0	0
Other current and long-term assets, excluding cash and near cash assets	28,785,000	'	'	'	33,393,000	'	'	'	28,785,000	33,393,000	29,014,000
Intersegment Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | Offshore Marine Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	-115,000	110,000	96,000
Intersegment Eliminations [Member] | Inland River Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	-2,887,000	2,152,000	0
Intersegment Eliminations [Member] | Shipping Services [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	108,000	0
Intersegment Eliminations [Member] | Ethanol and Industrial Alcohol [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | Other Segments [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	128,000	26,000
Intersegment Eliminations [Member] | Corporate And Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	3,002,000	-2,498,000	-122,000
Segment Reconciling Items [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Other Income (Expense) not included in Segment Profit	'	'	'	'	'	'	'	'	21,322,000	7,800,000	34,872,000
Less Equity Earnings included in Segment Profit	'	'	'	'	'	'	'	'	-7,264,000	5,764,000	-9,908,000
Cash and near cash assets	825,641,000	'	'	'	493,786,000	'	'	'	825,641,000	493,786,000	729,635,000
Assets of Disposal Group, Including Discontinued Operation	'	'	'	'	$948,877,000	'	'	'	'	$948,877,000	$1,088,966,000

Major_Customers_And_Segment_In3

Major Customers And Segment Information (Revenues Attributed By Geographical Region) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	$327,861	$336,784	$315,563	$267,064	$362,368	$338,855	$309,225	$297,849	$1,247,272	$1,308,297	$1,032,497
UNITED STATES	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	845,056	823,693	517,120
Foreign Operation [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Percentage of Operating Revenues	'	'	'	'	'	'	'	'	32.25%	37.04%	49.92%
Middle East [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	51,930	49,941	46,724
Africa Primarily West Africa [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	79,991	75,484	75,497
Asia [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	26,203	21,039	15,973
Europe Primarily North Sea [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	101,834	107,766	79,210
Other Countries [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	388	437
Mexico Central And South America [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	$142,258	$229,986	$297,536

Major_Customers_And_Segment_In4

Major Customers And Segment Information (Property And Equipment Based Upon The Assets' Physical Location) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	$1,476,335	$1,584,876	$1,440,657
Middle East [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	61,134	99,863	70,431
Asia [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	21,485	25,305	25,542
Africa Primarily West Africa [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	73,137	77,860	89,166
UNITED STATES	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	1,094,370	1,158,038	986,404
Mexico Central And South America [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	132,496	126,179	172,398
Europe Primarily North Sea [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net property and equipment	$93,713	$97,631	$96,716

Discountinued_Operations_Disco2

Discountinued Operations Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$0	$0	$0	($0.51)	$0.48	$0.31	$0.23	$0.73	($0.50)	$1.73	$1.48
Era Group [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Liability for Uncertain Tax Positions, Current	$10.10	'	'	'	'	'	'	'	$10.10	'	'
SES Business [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Proceeds from Divestiture of Businesses	'	'	'	'	'	'	'	'	'	99.9	'
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	'	'	'	'	'	'	'	'	1	18.6	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	'	'	'	'	'	'	'	'	'	$0.90	'
Goodwill, Other Changes	'	'	'	'	'	'	'	'	'	8	'
SEI [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Proceeds from Divestiture of Businesses	'	'	'	'	'	'	'	'	'	15.1	'
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	'	'	'	'	'	'	'	'	$0.10	$7.10	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	'	'	'	'	'	'	'	'	'	$0.34	'

Discountinued_Operations_Disco3

Discountinued Operations Discontinued Operations (Summarized Selected Operating Results) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	$327,861	$336,784	$315,563	$267,064	$362,368	$338,855	$309,225	$297,849	$1,247,272	$1,308,297	$1,032,497
Administrative and general	'	'	'	'	'	'	'	'	141,348	166,743	131,772
Depreciation and amortization	'	'	'	'	'	'	'	'	134,518	131,667	106,873
Total costs and expenses	'	'	'	'	'	'	'	'	1,184,737	1,275,879	984,198
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	37,507	23,987	18,839
Operating Income (Loss)	30,307	51,508	19,254	-1,027	9,332	20,058	-1,499	28,514	100,042	56,405	67,138
Nonoperating Income (Expense)	'	'	'	'	'	'	'	'	-32,410	-1,833	-63,369
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	26,747	24,181	3,310
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	7,264	-5,764	9,908
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	9,120	30,769	19,296	-21,361	-2,717	15,504	11,299	36,373	37,824	60,459	42,150
SES Business [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	22,387	131,346
Operating Expenses	'	'	'	'	'	'	'	'	0	18,234	90,267
Administrative and general	'	'	'	'	'	'	'	'	0	4,624	20,674
Depreciation and amortization	'	'	'	'	'	'	'	'	0	1,428	7,332
Total costs and expenses	'	'	'	'	'	'	'	'	0	24,286	118,273
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	0	-71	-61
Operating Income (Loss)	'	'	'	'	'	'	'	'	0	-1,970	13,012
Nonoperating Income (Expense)	'	'	'	'	'	'	'	'	-1,537	24,971	203
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	-538	6,342	5,659
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	0	301	-49
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	'	'	'	'	'	'	'	'	-999	16,960	7,507
SEI [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	515,468	731,164
Operating Expenses	'	'	'	'	'	'	'	'	0	503,294	720,791
Administrative and general	'	'	'	'	'	'	'	'	0	5,579	3,290
Depreciation and amortization	'	'	'	'	'	'	'	'	0	-3	7
Total costs and expenses	'	'	'	'	'	'	'	'	0	508,870	724,088
Operating Income (Loss)	'	'	'	'	'	'	'	'	0	6,598	7,076
Nonoperating Income (Expense)	'	'	'	'	'	'	'	'	-143	8,083	-5,335
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	-50	4,856	913
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	'	'	'	'	'	'	'	'	-93	9,825	828
Era Group [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	22,892	272,921	258,148
Operating Expenses	'	'	'	'	'	'	'	'	14,076	167,195	162,707
Administrative and general	'	'	'	'	'	'	'	'	2,653	34,785	31,893
Depreciation and amortization	'	'	'	'	'	'	'	'	3,875	42,502	42,612
Total costs and expenses	'	'	'	'	'	'	'	'	20,604	244,482	237,212
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	548	3,612	15,172
Operating Income (Loss)	'	'	'	'	'	'	'	'	2,836	32,051	36,108
Nonoperating Income (Expense)	'	'	'	'	'	'	'	'	-1,316	-9,478	-1,439
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	10,818	7,998	11,303
Income (Loss) from Equity Method Investments	'	'	'	'	'	'	'	'	65	-5,528	82
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	'	'	'	'	'	'	'	'	-9,233	9,047	23,448
Consolidation, Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	0	-109,941	-11,213
Operating Expenses	'	'	'	'	'	'	'	'	0	-109,938	-11,131
Administrative and general	'	'	'	'	'	'	'	'	0	-3	-82
Total costs and expenses	'	'	'	'	'	'	'	'	0	-109,941	-11,213
Operating Income (Loss)	'	'	'	'	'	'	'	'	$0	$0	$0

Supplemental_Information_For_S2

Supplemental Information For Statements Of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]	'	'	'
Income taxes paid	$4,285	$24,378	$8,398
Income taxes refunded	2,739	11,317	2,499
Interest paid, excluding capitalized interest	32,388	46,457	39,559
Company financed purchase of noncontrolling interests	0	48,064	0
Company financed sale of vessels	10,263	48,848	11,889
Contribution of assets to business ventures	0	15,123	12,361
Stock Issued During Period, Value, Acquisitions	0	585	0
Contribution of assets from noncontrolling interest	$0	$0	$124

Quarterly_Financial_Informatio2

Quarterly Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Revenues	$327,861,000	$336,784,000	$315,563,000	$267,064,000	$362,368,000	$338,855,000	$309,225,000	$297,849,000	$1,247,272,000	$1,308,297,000	$1,032,497,000
Operating Income (Loss)	30,307,000	51,508,000	19,254,000	-1,027,000	9,332,000	20,058,000	-1,499,000	28,514,000	100,042,000	56,405,000	67,138,000
Income (Loss) from Continuing Operations	9,120,000	30,769,000	19,296,000	-11,036,000	-12,295,000	9,239,000	6,495,000	21,188,000	48,149,000	24,627,000	10,367,000
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0	0	10,225,000	-9,618,000	-6,265,000	-4,804,000	-15,185,000	10,225,000	'	-31,783,000
Income (Loss) from Discontinued Operations, Net of Tax	'	'	'	-10,325,000	9,578,000	'	'	'	-10,325,000	35,832,000	31,783,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	9,120,000	30,769,000	19,296,000	-21,361,000	-2,717,000	15,504,000	11,299,000	36,373,000	37,824,000	60,459,000	42,150,000
Net Income attributable to SEACOR Holdings Inc.	-8,396,000	-30,291,000	-19,271,000	20,988,000	'	-16,102,000	-11,249,000	-36,488,000	-36,970,000	-61,215,000	-41,056,000
Income (Loss) from Continuing Operations Attributable to Parent	-8,396,000	-30,291,000	-19,271,000	10,763,000	12,242,000	-9,837,000	-6,445,000	-21,303,000	'	'	-9,273,000
Income (Loss) from Continuing Operations, Per Basic Share	$0.42	$1.52	$0.97	($0.55)	($0.61)	$0.48	$0.31	$1.04	$2.37	$1.24	$0.44
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$0	$0	$0	($0.51)	$0.48	$0.31	$0.24	$0.74	($0.51)	$1.76	$1.50
Basic Earnings Per Common Share of SEACOR Holdings Inc.	$0.42	$1.52	$0.97	($1.06)	($0.13)	$0.79	$0.55	$1.78	$1.86	$3	$1.94
Income (Loss) from Continuing Operations, Per Diluted Share	($0.41)	($1.36)	($0.91)	$0.55	$0.61	($0.47)	($0.31)	($1.02)	($2.32)	($1.22)	($0.43)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$0	$0	$0	$0.51	($0.48)	($0.31)	($0.23)	($0.73)	$0.50	($1.73)	($1.48)
Diluted Earnings Per Common Share of SEACOR Holdings Inc.	($0.41)	($1.36)	($0.91)	$1.06	$0.13	($0.78)	($0.54)	($1.75)	($1.82)	($2.95)	($1.91)
Era Group [Member]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	'	'	'	'	'	22,892,000	272,921,000	258,148,000
Operating Income (Loss)	'	'	'	'	'	'	'	'	2,836,000	32,051,000	36,108,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	'	'	'	'	'	'	'	'	-9,233,000	9,047,000	23,448,000
Liability for Uncertain Tax Positions, Current	10,100,000	'	'	'	'	'	'	'	10,100,000	'	'
Scenario, Previously Reported [Member]	'	'	'	'	'	'	'	'	'	'	'
Operating Revenues	'	'	'	267,064,000	'	'	'	'	'	'	'
Operating Income (Loss)	'	'	'	-1,027,000	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations	'	'	'	-11,036,000	'	'	'	'	'	'	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	'	'	'	111,000	'	'	'	'	'	'	'
Income (Loss) from Discontinued Operations, Net of Tax	'	'	'	-211,000	'	'	'	'	'	'	'
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	'	'	'	-10,874,000	'	'	'	'	'	'	'
Net Income attributable to SEACOR Holdings Inc.	'	'	'	10,874,000	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations Attributable to Parent	'	'	'	$10,763,000	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations, Per Basic Share	'	'	'	($0.55)	'	'	'	'	'	'	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	'	'	'	$0	'	'	'	'	'	'	'
Basic Earnings Per Common Share of SEACOR Holdings Inc.	'	'	'	($0.55)	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations, Per Diluted Share	'	'	'	$0.55	'	'	'	'	'	'	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	'	'	'	$0	'	'	'	'	'	'	'
Diluted Earnings Per Common Share of SEACOR Holdings Inc.	'	'	'	$0.55	'	'	'	'	'	'	'

Valuation_And_Qualifying_Accou1

Valuation And Qualifying Accounts (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'	'
Bad debt expense (income)	'	'	$170,000	$1,311,000	($56,000)
Valuation Allowances and Reserves, Reserves of Businesses Acquired	0	271,000	'	'	0
Allowance For Doubtful Accounts [Member]	'	'	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'	'
Balance Beginning of Year	1,201,000	2,355,000	1,201,000	2,355,000	4,196,000
Deductions	'	'	-209,000	-2,736,000	-1,785,000
Balance End of Year	'	'	1,162,000	1,201,000	2,355,000
Inventory Valuation Reserve [Member]	'	'	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'	'
Balance Beginning of Year	1,327,000	0	1,327,000	0	'
Valuation Allowances and Reserves, Charged to Cost and Expense	'	'	-406,000	971,000	'
Deductions	'	'	0	0	'
Balance End of Year	'	'	921,000	1,327,000	'
Valuation Allowances and Reserves, Reserves of Businesses Acquired	$0	$356,000	'	'	'