Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 157,439	$ 52,095
Accounts receivable, net	104,553	112,821
Accounts receivable - related party	6,642	9,815
Current assets held for sale	0	1,882
Fair value of derivative instruments	0	23,981
Deferred income taxes	4,201	0
Prepaids and other current assets	6,926	8,111
Total current assets	279,761	208,705
Oil and gas properties using the full cost method of accounting
Proved oil and gas properties, net	1,408,484	1,152,548
Unproved properties, not being amortized	377,437	323,688
Other property and equipment, net	8,294	11,438
TOTAL PROPERTY AND EQUIPMENT, NET	1,794,215	1,487,674
LONG-TERM ASSETS HELD FOR SALE	0	132,626
DEFERRED FINANCING COSTS, NET	22,899	23,914
FAIR VALUE OF DERIVATIVE INSTRUMENTS	9,284	5,180
DEFERRED INCOME TAXES	0	21,272
OTHER ASSETS	4,601	4,625
TOTAL ASSETS	2,110,760	1,883,996
CURRENT LIABILITIES
Accounts payable, trade	54,371	44,775
Accounts payable - related party	2,775	0
Revenue and royalties payable	80,198	82,300
Accrued drilling costs	85,452	60,729
Accrued interest	17,430	18,012
Other accrued liabilities	41,759	28,445
Advances for joint operations	19,967	8,069
Fair value of derivative instruments	9,947	0
Deferred income taxes	0	7,925
Current liabilities associated with assets held for sale	0	48,663
Current liabilities of discontinued operations	10,936	0
Total current liabilities	322,835	298,918
LONG-TERM DEBT, NET OF DEBT DISCOUNT	900,247	967,808
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE	0	23,547
LONG-TERM LIABILITIES OF DISCONTINUED OPERATIONS	17,336	0
ASSET RETIREMENT OBLIGATIONS	6,576	4,489
DEFERRED INCOME TAXES	16,856	0
OTHER LIABILITIES	5,306	4,218
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY
Common stock, $0.01 par value (90,000 shares authorized, 45,469 and 40,165 shares issued and outstanding at December 31, 2013 and 2012, respectively)	455	402
Additional paid-in capital	879,948	667,096
Accumulated deficit	(38,799)	(82,482)
Total shareholders’ equity	841,604	585,016
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 2,110,760	$ 1,883,996