Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 449,632	$ 527,435
Restricted cash	13,656	12,175
Marketable securities	43,286	24,292
Receivables:
Trade, net of allowance for doubtful accounts	215,191	215,768
Other Receivables	57,621	48,181
Inventories	20,896	27,615
Deferred income taxes	116	116
Prepaid expenses and other	11,431	6,701
Total current assets	811,829	862,283
Property and Equipment:
Property, Plant and Equipment, Gross	2,166,509	2,199,183
Accumulated depreciation	889,993	866,330
Property, Plant and Equipment, Other, Net in Service	1,276,516	1,332,853
Construction in progress	284,362	143,482
Net property and equipment	1,560,878	1,476,335
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	444,826	440,853
Construction Reserve Funds & Title XI Reserve Funds	321,278	261,739
Goodwill	62,904	17,985
Intangible Assets, Net	34,306	12,423
Other Assets	55,049	44,615
Total assets	3,291,070	3,116,233
Current Liabilities:
Current portion of long-term debt	50,785	45,323
Accounts payable and accrued expenses	90,704	85,477
Other current liabilities	139,999	123,619
Total current liabilities	281,488	254,419
Long-Term Debt	831,163	834,118
Deferred Income Taxes	459,039	457,827
Deferred Gains and Other Liabilities	185,950	144,441
Total liabilities	1,757,640	1,690,805
SEACOR Holdings Inc. stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding	0	0
Common stock, $.01 par value, 60,000,000 shares authorized; 37,458,240 and 37,219,201 shares issued in 2014 and 2013, respectively	375	372
Additional paid-in capital	1,485,342	1,394,621
Retained earnings	1,155,309	1,095,270
Shares held in Treasury of 17,,314,425 and 16,837,113 in 2014 and 2013, respectively, at cost	1,213,267	1,088,219
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,891)	(1,192)
Stockholders' equity attributable to parent, total	1,425,868	1,400,852
Noncontrolling interests in subsidiaries	107,562	24,576
Total equity	1,533,430	1,425,428
Liabilities and stockholders' equity, total	$ 3,291,070	$ 3,116,233