Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 5,728	$ 52,095
Accounts receivable, net	114,901	112,821
Accounts receivable - related party	5,930	9,815
Current assets held for sale	0	1,882
Assets of discontinued operations	0	0
Fair value of derivative instruments	0	23,981
Prepaids and other current assets	5,397	8,111
Total current assets	137,165	208,705
Oil and gas properties using the full cost method of accounting
Proved oil and gas properties, net	1,495,981	1,152,548
Unproved properties, not being amortized	395,291	323,688
Other property and equipment, net	9,800	11,438
TOTAL PROPERTY AND EQUIPMENT, NET	1,901,072	1,487,674
LONG-TERM ASSETS HELD FOR SALE	0	132,626
DEFERRED FINANCING COSTS, NET	21,728	23,914
FAIR VALUE OF DERIVATIVE INSTRUMENTS	7,410	5,180
DEFERRED INCOME TAXES	0	21,272
OTHER ASSETS	4,620	4,625
TOTAL ASSETS	2,071,995	1,883,996
CURRENT LIABILITIES
Accounts payable, trade	77,876	44,775
Revenue and royalties payable	103,250	82,300
Accrued drilling costs	57,161	60,729
Accrued interest	24,847	18,012
Other accrued liabilities	45,732	28,445
Advances for joint operations	34,528	8,069
Deferred income taxes	0	7,925
Current liabilities associated with assets held for sale	0	48,663
Liabilities of discontinued operations	10,670	0
Total current liabilities	354,064	298,918
LONG-TERM DEBT, NET OF DEBT DISCOUNT	987,074	967,808
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE	0	23,547
LIABILITIES OF DISCONTINUED OPERATIONS	17,742	0
ASSET RETIREMENT OBLIGATIONS	6,341	4,489
DEFERRED INCOME TAXES	32,796	0
OTHER LIABILITIES	5,900	4,218
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY
Common stock, $0.01 par value (90,000 shares authorized, 40,879 and 40,165 shares issued and outstanding as of September 30, 2013 and December 31, 2012, respectively)	409	402
Additional paid-in capital	682,479	667,096
Accumulated deficit	(14,810)	(82,482)
Total shareholders’ equity	668,078	585,016
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 2,071,995	$ 1,883,996