Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 278,155	$ 564,017
Accounts receivable, net of allowance for doubtful accounts of $30,592 and $28,242 at September 30, 2016 and December 31, 2015, respectively	271,323	428,514
Prepaid expenses	37,477	42,298
Inventory and other current assets	151,084	165,062
Assets of Disposal Group, Including Discontinued Operation, Current	62,247	95,234
Total current assets	800,286	1,295,125
Property, plant and equipment, net of accumulated depreciation and depletion of $2,395,301 and $2,278,856 at September 30, 2016 and December 31, 2015, respectively	1,753,713	2,123,291
Goodwill	806,087	1,140,101
Notes receivable	55,782	52,382
Intangible and other long-term assets, net of accumulated amortization of $67,036 and $83,520 at September 30, 2016 and December 31, 2015, respectively	227,952	303,345
Total assets	3,643,820	4,914,244
Current liabilities:
Accounts payable	81,641	114,475
Accrued expenses	242,376	271,246
Income taxes payable	2,919	9,185
Current portion of decommissioning liabilities	22,770	19,052
Current maturities of long-term debt		29,957
Total current liabilities	352,786	448,576
Disposal Group, Including Discontinued Operation, Liabilities	3,080	4,661
Deferred income taxes	200,664	383,069
Decommissioning liabilities	99,485	98,890
Long-term debt, net	1,283,581	1,588,263
Other long-term liabilities	193,571	184,634
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 - 151,719,236 as of September 30, 2016 Authorized - 250,000,000, Issued and Outstanding - 150,861,500 at December 31, 2015	152	151
Additional Paid in Capital	2,682,188	2,664,517
Accumulated other comprehensive loss, net	(72,310)	(45,694)
Retained earnings	(1,096,297)	(408,162)
Total stockholders' equity	1,513,733	2,210,812
Total liabilities and stockholders' equity	$ 3,643,820	$ 4,914,244