Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 98,015	$ 77,222
Restricted cash and restricted cash equivalents	1,119	1,222
Marketable securities	7,597	7,936
Receivables:
Trade, net of allowance for doubtful accounts of $1,380 and $2,871 in 2020 and 2019, respectively	196,076	194,022
Trade receivables, allowance for doubtful accounts	1,380	2,871
Other	67,862	38,881
Inventories	3,871	5,255
Prepaid expenses and other	6,364	6,971
Total current assets	380,904	331,509
Property and Equipment:
Historical cost	1,442,442	1,442,382
Accumulated depreciation	(663,277)	(624,024)
Net property and equipment	779,165	818,358
Operating Lease Right-of-Use Assets	124,855	144,539
Investments, at Equity, and Advances to 50% or Less Owned Companies	152,744	157,108
Goodwill	32,616	32,701
Intangible Assets, Net	21,041	20,996
Other Assets	8,404	7,761
Total Assets	1,499,729	1,512,972
Current Liabilities:
Current portion of long-term debt	10,845	58,854
Current portion of long-term operating lease liabilities	37,124	36,011
Current portion of other long-term financial liabilities	1,479	0
Accounts payable and accrued expenses	58,640	57,595
Other current liabilities	77,429	57,501
Total current liabilities	185,517	209,961
Long-Term Debt	238,005	255,612
Long-Term Operating Lease Liabilities	87,579	108,295
Other Long-Term Financial Liabilities	31,701	0
Deferred Income Taxes	109,664	105,661
Deferred Gains and Other Liabilities	18,910	20,929
Total liabilities	671,376	700,458
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; 41,012,817 and 40,819,892 shares issued in 2020 and 2019, respectively	$ 410	$ 408
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)	41,012,817	40,819,892
Additional paid-in capital	$ 1,666,218	$ 1,661,002
Retained earnings	529,647	517,106
Shares held in treasury of 20,640,307 and 20,643,724 in 2020 and 2019, respectively, at cost	$ (1,365,921)	$ (1,365,792)
Treasury stock, shares held in treasury (in shares)	20,640,307	20,643,724
Accumulated other comprehensive loss, net of tax	$ (2,779)	$ (998)
Stockholders' equity attributable to parent, total	827,575	811,726
Noncontrolling interests in subsidiaries	778	788
Total equity	828,353	812,514
Liabilities and stockholders' equity, total	$ 1,499,729	$ 1,512,972