Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 18,512	$ 23,473	$ 27,410	$ 245,979
Accounts receivable, net of allowance for doubtful accounts of $1,195 in 2015 and 2016	59,462	79,404
Accrued revenue	196,490	128,242
Derivative instruments	417,605	1,009,030
Other current assets	3,402	8,087
Total current assets	695,471	1,248,236
Natural gas properties, at cost (successful efforts method):
Unproved properties	2,449,995	1,996,081
Proved properties	9,180,705	8,211,106
Water handling and treatment systems	681,062	565,616
Gathering systems and facilities	1,656,676	1,502,396
Other property and equipment	45,571	46,415
Property and equipment, gross	14,014,009	12,321,614
Less accumulated depletion, depreciation, and amortization	(2,176,793)	(1,589,372)
Property and equipment, net	11,837,216	10,732,242
Derivative instruments	2,015,090	2,108,450
Other assets	81,476	26,565
Total assets	14,629,253	14,115,493
Current liabilities:
Accounts payable	172,293	364,160
Accrued liabilities	245,174	194,076
Revenue distributions payable	172,202	129,949
Derivative instruments	3,110
Other current liabilities	19,125	19,085
Total current liabilities	611,904	707,270
Long-term liabilities:
Long-term debt	4,759,904	4,668,782
Deferred income tax liability	1,215,240	1,370,686
Derivative instruments	40
Other liabilities	61,883	82,077
Total liabilities	6,648,971	6,828,815
Equity:
Common stock, $0.01 par value; authorized - 1,000,000 shares; issued and outstanding 277,036 shares and 307,188 shares, respectively	3,072	2,770
Additional paid-in capital	5,131,909	4,122,811
Accumulated earnings	1,445,767	1,808,811
Total stockholders' equity	6,580,748	5,934,392
Noncontrolling interest in consolidated subsidiary	1,399,534	1,352,286
Total equity	7,980,282	7,286,678
Total liabilities and equity	$ 14,629,253	$ 14,115,493