CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flow from operating activities:
Net loss	$ (4,759,811)	$ (451,809)	$ (691,337)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	805,757	1,073,902	829,311
Impairment of long-lived assets	5,813,954	2,303,749	828,317
Unit-based compensation expenses	56,136	53,284	42,703
(Gain) loss on extinguishment of debt	(719,259)	0	5,304
Amortization and write-off of deferred financing fees	34,743	50,926	21,507
(Gains) losses on sale of assets and other, net	(189,161)	(261,571)	37,232
Deferred income taxes	4,538	3,943	(2,541)
Derivatives activities:
Total gains	(1,063,082)	(1,206,179)	(177,857)
Cash settlements	1,199,410	95,514	248,862
Cash settlements on canceled derivatives	4,679	12,281	0
Changes in assets and liabilities:
Decrease in accounts receivable – trade, net	267,241	5,064	89,188
(Increase) decrease in other assets	9,582	(17,824)	16,179
Increase (decrease) in accounts payable and accrued expenses	(156,394)	99,029	(76,993)
Decrease in other liabilities	(58,876)	(48,419)	(3,663)
Net cash provided by operating activities	1,249,457	1,711,890	1,166,212
Cash flow from investing activities:
Acquisition of oil and natural gas properties and joint-venture funding, net of cash acquired	0	(2,479,252)	(279,213)
Development of oil and natural gas properties	(608,889)	(1,569,877)	(1,078,025)
Purchases of other property and equipment	(66,708)	(74,540)	(92,352)
Proceeds from sale of properties and equipment and other	368,295	2,203,565	196,273
Net cash used in investing activities	(307,302)	(1,920,104)	(1,253,317)
Cash flow from financing activities:
Proceeds from sale of units	233,427	0	0
Proceeds from borrowings	1,445,000	5,940,024	2,230,000
Repayments of debt	(2,183,879)	(4,811,124)	(1,404,898)
Distributions to unitholders	(323,878)	(962,048)	(682,241)
Financing fees and offering costs	(28,055)	(69,694)	(16,033)
Excess tax benefit from unit-based compensation		766	160
Excess tax benefit from unit-based compensation	(9,467)
Other	(74,944)	59,928	11,045
Net cash provided by (used in) financing activities	(941,796)	157,852	138,033
Net increase (decrease) in cash and cash equivalents	359	(50,362)	50,928
Cash and cash equivalents:
Beginning	1,809	52,171	1,243
Ending	$ 2,168	$ 1,809	$ 52,171