Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 4,572	$ 4,836
Accounts receivable, net	42,888	38,081
Other receivables	2,697	6,338
Prepaid expenses and other current assets	3,725	2,292
Derivative financial instruments	25,787	10,436
TOTAL CURRENT ASSETS	79,669	61,983
PROPERTY AND EQUIPMENT
Oil and natural gas properties, successful efforts method, net	555,357	442,880
Other property and equipment, net	16,029	13,384
TOTAL PROPERTY AND EQUIPMENT, NET	571,386	456,264
OTHER ASSETS
Investment in Partnership - cost	9,000	9,000
Deferred financing costs, net	12,898	13,552
Derivative financial instruments	24,106	14,165
Advances to operators	4,088	2,699
Deposits	1,896	576
TOTAL OTHER ASSETS	51,988	39,992
TOTAL ASSETS	703,043	558,239
CURRENT LIABILITIES
Accounts payable and accrued liabilities	79,318	87,255
Current portion, asset retirement obligations	3,418	1,617
Derivative financial instruments	1,959	3,092
TOTAL CURRENT LIABILITIES	84,695	91,964
LONG-TERM LIABILITIES
Asset retirement obligations	43,275	41,096
Long-term debt	471,971	371,276
Notes payable to founder	20,606	19,709
Derivative financial instruments	0	2,296
Other long-term liabilities	5,052	7,240
TOTAL LONG-TERM LIABILITIES	540,904	441,617
TOTAL LIABILITIES	625,599	533,581
COMMITMENTS AND CONTINGENCIES (NOTE 10)
PARTNERS' CAPITAL	77,444	24,658
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ 703,043	$ 558,239