CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 17,433	$ 2,195
Accounts receivable: oil and gas sales	32,263	3,014
Due from affiliate	3,734	0
Due from general partner	0	715
Derivative instruments	32,683	9,887
Prepaid and other current assets	249	1,283
Total current assets	86,362	17,094
Noncurrent assets:
Oil and gas properties, using the full cost method of accounting	975,182	892,649
Gas processing equipment	865	109
Less accumulated depreciation, depletion, amortization	(80,484)	(2,130)
Total property and equipment, net	895,563	890,628
Derivative instruments	70,570	26,415
Deferred taxes	290	1,100
Deferred financing costs, net of amortization	4,279	3,478
Total noncurrent assets	970,702	921,621
Total assets	1,057,064	938,715
Current liabilities:
Due to affiliates	0	442
Current portion of asset retirement obligations	348	4,166
Derivative instruments	9,569	10,886
Accrued and other liabilities	50,027	8,021
Total current liabilities	59,944	23,515
Noncurrent liabilities:
Long-term debt	500,000	452,000
Derivative instruments	16,906	46,801
Asset retirement obligations	65,353	39,248
Deferred taxes	20	0
Total noncurrent liabilities	582,279	538,049
Commitments and contingencies (See Note 8)
Partners' capital:
Predecessor's capital	0	179,546
Class C converible preferred unitholders (16,666,667 and zero units issued and outstanding as of December 31, 2011 and 2010)	358,138	0
General partner (35,729 units issued and outstanding as of December 31, 2011 and 2010)	546	708
Total partners' capital	414,841	377,151
Total liabilities and partners' capital	1,057,064	938,715
Limited Partners-Public Common [Member]
Partners' capital:
Limited partners	241,306	276,723
Total partners' capital	241,306	276,723
Limited Partners-Affiliated - Common [Member]
Partners' capital:
Limited partners	(113,414)	(48,898)
Total partners' capital	(113,414)	(48,898)
Limited Partners-Affiliated - Subordinated [Member]
Partners' capital:
Limited partners	(71,735)	(30,928)
Total partners' capital	$ (71,735)	$ (30,928)