CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues and other:
Oil, natural gas and natural gas liquids sales	$ 1,726,271	$ 3,610,539	$ 2,073,240
Gains on oil and natural gas derivatives	1,056,189	1,206,179	177,857
Marketing revenues	74,129	135,260	54,171
Other revenues	26,745	31,325	26,387
Total revenues	2,883,334	4,983,303	2,331,655
Expenses:
Lease operating expenses	617,764	805,164	372,523
Transportation expenses	219,721	207,331	128,440
Marketing expenses	57,144	117,465	37,892
General and administrative expenses	296,887	293,073	236,271
Exploration costs	9,473	125,037	5,251
Depreciation, depletion and amortization	805,757	1,073,902	829,311
Impairment of long-lived assets	5,813,954	2,303,749	828,317
Taxes, other than income taxes	181,895	267,403	138,631
(Gains) losses on sale of assets and other, net	(197,409)	(366,500)	13,637
Total expenses	7,805,186	4,826,624	2,590,273
Other income and (expenses):
Interest expense, net of amounts capitalized	(546,453)	(587,838)	(421,137)
Gain (loss) on extinguishment of debt	719,259	0	(5,304)
Other, net	(17,226)	(16,213)	(8,477)
Total other income and (expenses)	155,580	(604,051)	(434,918)
Loss before income taxes	(4,766,272)	(447,372)	(693,536)
Income tax expense (benefit)	(6,461)	4,437	(2,199)
Net loss	$ (4,759,811)	$ (451,809)	$ (691,337)
Net loss per unit:
Basic (in usd per unit)	$ (13.87)	$ (1.40)	$ (2.94)
Diluted (in usd per unit)	$ (13.87)	$ (1.40)	$ (2.94)
Weighted average units outstanding:
Basic (in units)	343,323	328,918	237,544
Diluted (in units)	343,323	328,918	237,544
Distributions declared per unit (in usd per unit)	$ 0.938	$ 2.90	$ 2.90