Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets
Cash and equivalents	$ 105	$ 349
Accounts receivable - trade, net	6,151	9,123
Other receivables	200	1,267
Inventory	1,568	1,788
Other	3,884	7,492
Derivative financial instruments	34,234	42,803
Total	46,142	62,822
Oil and natural gas properties, full cost method of accounting, net	118,897	124,068
Pipeline assets, net	58,069	59,088
Other property and equipment, net	15,673	14,726
Other, net	1,051	3,497
Equity investment	10,471	12,994
Derivative financial instruments	17,360	29,516
Total assets	267,663	306,711
Current liabilities
Accounts payable	3,978	6,286
Revenue payable	3,529	4,972
Accrued expenses and other	5,571	8,700
Litigation reserve	4,415	3,081
Current portion of long-term debt	167,355	3,000
Derivative financial instruments	5,424	5,223
Total	190,272	31,262
Derivative financial instruments	2,999	4,611
Long-term debt		190,000
Asset retirement obligations	12,130	11,733
Other	348	4,559
Total liabilities	205,749	242,165
Commitments and contingencies
Stockholders' equity
Common stock, $0.01 par value; 40,000,000 authorized shares; 9,935,337 and 12,409,042 issued and outstanding, respectively	124	99
Additional paid-in capital	382,870	378,093
Accumulated deficit	(381,545)	(370,384)
Total equity	1,451	7,810
Total liabilities and equity	267,663	306,711
Series A Preferred Stock
Stockholders' equity
Series A Cumulative Redeemable Preferred Stock, $0.01 par value; issued and outstanding - 6,000 shares	60,463	56,736
Series B Preferred Stock
Stockholders' equity
Preferred stock, $0.01 par value; 5,000,000 authorized shares; 215,662 and 236,231 Series B Voting Preferred Stock issued and outstanding, respectively	$ 2	$ 2