CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 15,373	$ 599
Accounts receivable		34,584	60,239
Short-term derivative instruments		69,464	272,320
Prepaid expenses and other current assets		13,163	7,028
Total current assets		132,584	340,186
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		3,115,012	3,616,325
Support equipment and facilities		199,093	205,876
Other		15,344	2,671
Accumulated depreciation, depletion and impairment		(1,749,747)	(1,878,549)
Property and equipment, net		1,579,702	1,946,323
Long-term derivative instruments		102,630	461,810
Restricted investments		156,234	152,631
Other long-term assets		2,104	5,053
Total assets		1,973,254	2,906,003
Current liabilities:
Accounts payable		4,353	8,792
Accounts payable - affiliates		0	3,339
Revenues payable		21,285	25,504
Accrued liabilities (see Note 3)		65,235	52,923
Short-term derivative instruments		0	2,850
Current portion of long-term debt (see Note 9)	[1]	1,622,904	0
Total current liabilities		1,713,777	93,408
Long-term debt (see Note 9)		0	2,000,579
Asset retirement obligations		154,913	162,989
Long-term derivative instruments		0	1,441
Deferred tax liabilities		2,280	2,094
Other long-term liabilities		2,795	0
Total liabilities		1,873,765	2,260,511
Commitments and contingencies (see Note 14)
Partners' equity:
General partner (86,797 units outstanding at December 31, 2015)		0	848
Total partners' equity		99,489	645,492
Total liabilities and equity		1,973,254	2,906,003
Limited Partners Common Units [Member]
Partners' equity:
Limited partners units		99,489	644,644
Total partners' equity		$ 99,489	$ 644,644

[1] Due to an existing and anticipated financial covenant violations, the Partnership’s revolving credit facility and senior notes were classified as current at December 31, 2016.