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Consolidated Balance Sheet (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
ASSETS    
Cash and cash equivalents $ 470,872 $ 143,520
Short-term investments 19,994   
Accounts receivable - oil and gas revenues 52,164 25,909
Accounts receivable - joint interest partners 67,268 28,596
Inventory 3,543 1,323
Prepaid expenses 2,140 490
Advances to joint interest partners 3,935 3,595
Deferred income taxes 3,233 2,470
Other current assets 491  
Total current assets 623,640 205,903
Property, plant and equipment    
Oil and gas properties (successful efforts method) 1,235,357 580,968
Other property and equipment 20,859 1,970
Less: accumulated depreciation, depletion, amortization and impairment (176,261) (99,255)
Total property, plant and equipment, net 1,079,955 483,683
Derivative instruments 4,362  
Deferred costs and other assets 19,425 2,266
Total assets 1,727,382 691,852
LIABILITIES AND STOCKHOLDERS' EQUITY    
Accounts payable 12,207 8,198
Advances from joint interest partners 9,064 3,101
Revenues and production taxes payable 19,468 6,180
Accrued liabilities 119,692 58,239
Accrued interest payable 15,774 2
Derivative instruments 5,907 6,543
Other current liabilities 472  
Total current liabilities 182,584 82,263
Long-term debt 800,000   
Asset retirement obligations 13,075 7,640
Derivative instruments 3,505 3,943
Deferred income taxes 92,983 45,432
Other liabilities 997 780
Total liabilities 1,093,144 140,058
Commitments and contingencies (Note 14)      
Stockholders' equity    
Common stock, $0.01 par value; 300,000,000 shares authorized; 92,483,393 issued and 92,460,914 outstanding at December 31, 2011 and 92,240,345 shares issued and outstanding at December 31, 2010 921 920
Treasury stock, at cost; 22,479 shares (602)  
Additional paid-in-capital 647,374 643,719
Retained deficit (13,455) (92,845)
Total stockholders' equity 634,238 551,794
Total liabilities and stockholders' equity $ 1,727,382 $ 691,852