Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 496,473	$ 530,009
Marketable securities	110,894	138,200
Receivables:
Trade, net of allowance for doubtful accounts of $2,764 and $2,483 in 2016 and 2015, respectively	130,731	159,076
Other Receivables	31,440	27,217
Inventories	18,431	24,768
Prepaid expenses and other	9,615	8,627
Total current assets	797,584	887,897
Property and Equipment:
Property, Plant and Equipment, Gross	2,015,205	2,123,201
Accumulated depreciation	986,048	994,181
Property, Plant and Equipment, Other, Net in Service	1,029,157	1,129,020
Construction in progress	484,472	454,605
Held for sale equipment	86,332	0
Net property and equipment	1,599,961	1,583,625
Investments, at Equity, and Advances to 50% or Less Owned Companies	334,370	331,103
Construction Reserve Funds	255,350	255,408
Goodwill	52,376	52,340
Intangible Assets, Net	25,750	26,392
Other Assets	46,496	48,654
Total assets	3,111,887	3,185,419
Current Liabilities:
Current portion of long-term debt	35,688	35,531
Accounts payable and accrued expenses	50,660	71,952
Other current liabilities	107,811	92,677
Total current liabilities	194,159	200,160
Long-Term Debt	1,018,331	1,034,859
Exchange Option Liability on Subsidiary Convertible Senior Notes	5,747	5,611
Deferred Income Taxes	374,476	389,988
Deferred Gains and Other Liabilities	153,051	163,862
Total liabilities	1,745,764	1,794,480
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; 37,845,556 and 37,684,829 shares issued in 2016 and 2015, respectively	379	377
Additional paid-in capital	1,508,981	1,505,942
Retained earnings	1,099,434	1,126,620
Shares held in Treasury of 20,550,746 and 20,529,929 in 2016 and 2015, respectively, at cost	1,357,809	1,356,499
Accumulated Other Comprehensive Loss, Net of Tax	(7,764)	(5,620)
Stockholders' equity attributable to parent, total	1,243,221	1,270,820
Noncontrolling interests in subsidiaries	122,902	120,119
Total equity	1,366,123	1,390,939
Liabilities and stockholders' equity, total	$ 3,111,887	$ 3,185,419