Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 76,815	$ 144,221
Restricted cash and restricted cash equivalents	1,221	2,991
Marketable securities	6,038	30,316
Receivables:
Trade, net of allowance for doubtful accounts of $2,961 and $3,481 in 2019 and 2018, respectively	199,013	171,828
Trade receivables, allowance for doubtful accounts	2,961	3,481
Other	43,449	38,881
Inventories	5,224	4,530
Prepaid expenses and other	6,130	5,382
Total current assets	337,890	398,149
Property and Equipment:
Historical cost	1,424,907	1,407,329
Accumulated depreciation	(607,727)	(560,819)
Net property and equipment	817,180	846,510
Operating Lease Right-of-Use Assets	153,464
Investments, at Equity, and Advances to 50% or Less Owned Companies	154,968	156,886
Construction Reserve Funds	3,908	3,908
Goodwill	32,668	32,708
Intangible Assets, Net	21,884	24,551
Other Assets	8,284	8,312
Total Assets	1,530,246	1,471,024
Current Liabilities:
Current portion of long-term debt	76,426	8,497
Current portion of long-term operating lease liabilities	36,422
Accounts payable and accrued expenses	54,921	59,607
Other current liabilities	67,603	55,659
Total current liabilities	235,372	123,763
Long-Term Debt	241,408	346,128
Long-Term Operating Lease Liabilities	116,866
Deferred Income Taxes	103,489	94,420
Deferred Gains and Other Liabilities	20,463	52,871
Total liabilities	717,598	617,182
SEACOR Holdings Inc. stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized; none issued nor outstanding	$ 0	0
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000
Common stock, $0.01 par value, 60,000,000 shares authorized; 40,818,495 and 39,001,924 shares issued in 2019 and 2018, respectively	$ 408	$ 390
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	60,000,000
Common stock, shares issued (in shares)	40,818,495	39,001,924
Additional paid-in capital	$ 1,659,428	$ 1,596,642
Retained earnings	519,023	474,809
Shares held in treasury of 20,639,277 and 20,671,627 in 2019 and 2018, respectively, at cost	$ (1,365,594)	$ (1,366,773)
Treasury stock, shares held in treasury (in shares)	20,639,277	20,671,627
Accumulated other comprehensive loss, net of tax	$ (1,400)	$ (914)
Stockholders' equity attributable to parent, total	811,865	704,154
Noncontrolling interests in subsidiaries	783	149,688
Total equity	812,648	853,842
Liabilities and stockholders' equity, total	$ 1,530,246	$ 1,471,024