Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 151,766	$ 187,591
Accounts receivable, net of allowance for doubtful accounts of $29,034 and $29,740 at March 31, 2017 and December 31, 2016, respectively	329,770	297,164
Income taxes receivable	121,309	101,578
Prepaid expenses	42,976	37,288
Inventory and other current assets	139,631	130,772
Assets held for sale	27,411	27,158
Total current assets	812,863	781,551
Property, plant and equipment, net of accumulated depreciation and depletion of $2,537,156 and $2,454,339 at March 31, 2017 and December 31, 2016, respectively	1,513,282	1,605,365
Goodwill	804,436	803,917
Notes receivable	57,423	56,650
Intangible and other long-term assets, net of accumulated amortization of $73,228 and $69,588 at March 31, 2017 and December 31, 2016, respectively	190,707	222,772
Total assets	3,378,711	3,470,255
Current liabilities:
Accounts payable	102,221	94,831
Accrued expenses	236,978	218,192
Income taxes payable		694
Current portion of decommissioning liabilities	22,188	22,164
Liabilities held for sale	7,401	8,653
Total current liabilities	368,788	344,534
Deferred income taxes	213,855	243,611
Decommissioning liabilities	103,186	101,513
Long-term debt, net	1,286,210	1,284,600
Other long-term liabilities	193,974	192,077
Stockholders' equity:
Preferred stock of $0.01 par value. Authorized, 5,000,000 shares; none issued
Common stock of $0.001 par value. Authorized-250,000,000, Issued and Outstanding - 152,831,563 at March 31, 2017, Authorized-250,000,000, Issued and Outstanding - 151,861,661 at December 31, 2016	153	152
Additional Paid in Capital	2,690,265	2,691,553
Accumulated other comprehensive loss, net	(78,524)	(80,248)
Retained deficit	(1,399,196)	(1,307,537)
Total stockholders' equity	1,212,698	1,303,920
Total liabilities and stockholders' equity	$ 3,378,711	$ 3,470,255