Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 23,473	$ 245,979	$ 17,487	$ 18,989
Accounts receivable, net of allowance for doubtful accounts of $1,251 in 2014 and $1,195 in 2015	79,404	116,203
Accrued revenue	128,242	191,558
Derivative instruments	1,009,030	692,554
Other current assets	8,087	5,866
Total current assets	1,248,236	1,252,160
Natural gas properties, at cost (successful efforts method):
Unproved properties	1,996,081	2,060,936
Proved properties	8,211,106	6,515,221
Water handling systems	565,616	421,012
Gathering systems and facilities	1,502,396	1,197,239
Other property and equipment	46,415	37,687
Property and equipment, gross	12,321,614	10,232,095
Less accumulated depletion, depreciation, and amortization	(1,589,372)	(879,643)
Property and equipment, net	10,732,242	9,352,452
Derivative instruments	2,108,450	899,997
Other assets	66,296	68,886
Total assets	14,155,224	11,573,495
Current liabilities:
Accounts payable	364,160	531,564
Accrued liabilities	194,076	168,614
Revenue distributions payable	129,949	182,352
Other current liabilities	19,085	12,202
Total current liabilities	707,270	894,732
Long-term liabilities:
Long-term debt	4,708,513	4,362,550
Deferred income tax liability	1,370,686	794,796
Other liabilities	82,077	47,587
Total liabilities	6,868,546	6,099,665
Stockholders' Equity:
Common stock, $0.01 par value; authorized - 1,000,000,000 shares; issued and outstanding 262,071,642 shares and 277,035,558 shares, respectively	2,770	2,621
Additional paid-in capital	4,122,811	3,513,725
Accumulated earnings	1,808,811	867,447
Total stockholders' equity	5,934,392	4,383,793
Noncontrolling interest in consolidated subsidiary	1,352,286	1,090,037
Total equity	7,286,678	5,473,830	$ 3,598,660	$ 1,673,737
Total liabilities and equity	$ 14,155,224	$ 11,573,495