Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 252,221	$ 272,624
Accounts receivable, net of allowance for doubtful accounts of $11,891 and $12,156 at March 31, 2020 and December 31, 2019, respectively	310,902	332,047
Income taxes receivable	29,914	740
Prepaid expenses	38,902	49,132
Inventory and other current assets	125,718	117,629
Assets held for sale	121,080	216,197
Total current assets	878,737	988,369
Property, plant and equipment, net of accumulated depreciation and depletion of $2,193,111 and $2,214,116 at March 31, 2020 and December 31, 2019, respectively	620,017	664,949
Operating lease right-of-use assets	76,533	80,906
Goodwill	136,155	137,695
Notes receivable	69,245	68,092
Restricted cash	2,773	2,764
Intangible and other long-term assets, net of accumulated amortization of $23,459 and $23,199 at March 31, 2020 and December 31, 2019, respectively	47,431	50,455
Total assets	1,830,891	1,993,230
Current liabilities:
Accounts payable	73,144	92,966
Accrued expenses	164,883	182,934
Current portion of decommissioning liabilities	3,677	3,649
Liabilities held for sale	8,226	44,938
Total current liabilities	249,930	324,487
Long-term debt, net	1,284,008	1,286,629
Decommissioning liabilities	134,031	132,632
Operating lease liabilities	57,948	62,354
Deferred income taxes	7,129	3,247
Other long-term liabilities	129,955	134,308
Stockholders’ equity (deficit):
Preferred stock of $0.01 par value. Authorized - 5,000,000 shares; none issued
Common stock of $0.001 par value, Authorized - 25,000,000, Issued - 15,798,428, Outstanding - 14,826,016 at March 31, 2020, Authorized - 25,000,000, Issued - 15,689,463, Outstanding - 14,717,051 at December 31, 2019	16	16
Additional paid-in capital	2,755,178	2,752,859
Treasury stock at cost, 972,412 shares at March 31, 2020 and December 31, 2019, respectively	(4,290)	(4,290)
Accumulated other comprehensive loss, net	(76,465)	(71,927)
Accumulated deficit	(2,706,549)	(2,627,085)
Total stockholders’ equity (deficit)	(32,110)	49,573
Total liabilities and stockholders’ equity (deficit)	$ 1,830,891	$ 1,993,230