Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 31,610	$ 23,473	$ 245,979	$ 17,487
Accounts receivable, net of allowance for doubtful accounts of $1,195 in 2015 and 2016	29,682	79,404
Accrued revenue	261,960	128,242
Derivative instruments	73,022	1,009,030
Other current assets	6,313	8,087
Total current assets	402,587	1,248,236
Natural gas properties, at cost (successful efforts method):
Unproved properties	2,331,173	1,996,081
Proved properties	9,549,671	8,211,106
Water handling and treatment systems	744,682	565,616
Gathering systems and facilities	1,723,768	1,502,396
Other property and equipment	41,231	46,415
Property and equipment, gross	14,390,525	12,321,614
Less accumulated depletion, depreciation, and amortization	(2,363,778)	(1,589,372)
Property and equipment, net	12,026,747	10,732,242
Derivative instruments	1,731,063	2,108,450
Other assets	95,153	26,565
Total assets	14,255,550	14,115,493
Current liabilities:
Accounts payable	38,627	69,911
Accrued liabilities	393,803	488,325
Revenue distributions payable	163,989	129,949
Derivative instruments	203,635
Other current liabilities	17,334	19,085
Total current liabilities	817,388	707,270
Long-term liabilities:
Long-term debt	4,703,973	4,668,782
Deferred income tax liability	950,217	1,370,686
Derivative instruments	234
Other liabilities	55,160	82,077
Total liabilities	6,526,972	6,828,815
Equity:
Common stock, $0.01 par value; authorized - 1,000,000 shares; issued and outstanding 277,036 shares and 314,877 shares, respectively	3,149	2,770
Additional paid-in capital	5,299,481	4,122,811
Accumulated earnings	959,995	1,808,811
Total stockholders' equity	6,262,625	5,934,392
Noncontrolling interest in consolidated subsidiary	1,465,953	1,352,286
Total equity	7,728,578	7,286,678	$ 5,473,830	$ 3,598,660
Total liabilities and equity	$ 14,255,550	$ 14,115,493