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Condensed Consolidated Balance Sheet (Unaudited) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
ASSETS    
Cash and cash equivalents $ 125,440 $ 213,447
Restricted cash 986,210 0
Short-term investments 0 25,891
Accounts receivable — oil and gas revenues 155,068 110,341
Accounts receivable — joint interest partners 120,058 99,194
Inventory 18,358 20,707
Prepaid expenses 7,440 1,770
Advances to joint interest partners 1,170 1,985
Derivative instruments 374 19,016
Deferred income taxes 8,683 0
Other current assets 473 335
Total current assets 1,423,274 492,686
Property, plant and equipment    
Oil and gas properties (successful efforts method) 3,044,515 2,348,128
Other property and equipment 157,926 49,732
Less: accumulated depreciation, depletion, amortization and impairment (589,173) (391,260)
Total property, plant and equipment, net 2,613,268 2,006,600
Derivative instruments 3,405 4,981
Deferred costs and other assets 43,436 24,527
Total assets 4,083,383 2,528,794
LIABILITIES AND STOCKHOLDERS’ EQUITY    
Accounts payable 39,468 12,491
Advances from joint interest partners 13,211 21,176
Revenues and production taxes payable 133,083 71,553
Accrued liabilities 198,493 189,863
Accrued interest payable 22,873 30,096
Derivative instruments 17,060 1,048
Deferred income taxes 0 4,558
Total current liabilities 424,188 330,785
Long-term debt 2,360,000 1,200,000
Asset retirement obligations 26,999 22,956
Derivative instruments 852 380
Deferred income taxes 293,156 177,671
Other liabilities 2,310 1,997
Total liabilities 3,107,505 1,733,789
Commitments and contingencies (Note 13)      
Stockholders’ equity    
Common stock, $0.01 par value; 300,000,000 shares authorized; 93,854,867 issued and 93,690,494 outstanding at September 30, 2013; 93,432,712 issued and 93,303,298 outstanding at December 31, 2012 926 925
Treasury stock, at cost; 164,373 and 129,414 shares at September 30, 2013 and December 31, 2012, respectively (5,220) (3,796)
Additional paid-in-capital 666,770 657,943
Retained earnings 313,402 139,933
Total stockholders’ equity 975,878 795,005
Total liabilities and stockholders’ equity $ 4,083,383 $ 2,528,794