Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 267,156	$ 256,638
Restricted cash	2,436	2,249
Marketable securities	62,606	76,137
Receivables:
Trade, net of allowance for doubtful accounts of $2,400 and $2,989 in 2017 and 2016, respectively	83,287	108,641
Other Receivables	38,176	35,482
Inventories	3,952	2,582
Prepaid expenses and other	6,741	3,707
Discontinued operations	0	277,365
Total current assets	464,354	762,801
Property and Equipment:
Property, Plant and Equipment, Gross	1,483,434	1,178,556
Accumulated depreciation	487,049	444,559
Property, Plant and Equipment, Other, Net in Service	996,385	733,997
Construction in progress	22,769	246,010
Net property and equipment	1,019,154	980,007
Investments, at Equity, and Advances to 50% or Less Owned Companies	175,387	175,461
Construction Reserve Funds	51,846	75,753
Goodwill	32,773	32,758
Intangible Assets, Net	30,655	20,078
Other Assets	8,796	17,189
Discontinued Operations	0	798,274
Total assets	1,782,965	2,862,321
Current Liabilities:
Current portion of long-term debt	119,840	163,202
Accounts payable and accrued expenses	31,518	59,563
Other current liabilities	70,762	62,164
Discontinued operations	0	85,020
Total current liabilities	222,120	369,949
Long-Term Debt	619,712	631,084
Exchange Option Liability on Subsidiary Convertible Senior Notes	0	19,436
Deferred Income Taxes	165,093	157,441
Deferred Gains and Other Liabilities	81,238	98,098
Discontinued Operations	0	390,045
Total liabilities	1,088,163	1,666,053
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; 38,473,585 and 37,939,032 shares issued in 2017 and 2016, respectively	385	379
Additional paid-in capital	1,557,086	1,518,635
Retained earnings	377,700	910,723
Shares held in treasury of 20,614,250 and 20,538,327 in 2017 and 2016, respectively, at cost	1,363,558	1,357,331
Accumulated other comprehensive loss, net of tax	(266)	(11,514)
Stockholders' equity attributable to parent, total	571,347	1,060,892
Noncontrolling interests in subsidiaries	123,455	135,376
Total equity	694,802	1,196,268
Liabilities and stockholders' equity, total	$ 1,782,965	$ 2,862,321

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.