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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 11,440 $ 11,226
Accounts receivable, net 218,302 204,335
Inventory 17,942 10,648
Prepaid expenses 10,610 7,623
Derivative instruments 31,851 362
Other current assets 62 4,355
Total current assets 290,207 238,549
Property, plant and equipment    
Oil and gas properties (successful efforts method) 7,488,075 7,296,568
Other property and equipment 695,592 618,790
Less: accumulated depreciation, depletion, amortization and impairment (2,252,653) (1,995,791)
Total property, plant and equipment, net 5,931,014 5,919,567
Derivative instruments 11,834 0
Long-term inventory 8,762 0
Other assets 19,904 20,516
Total assets 6,261,721 6,178,632
Current liabilities    
Accounts payable 12,257 4,645
Revenues and production taxes payable 143,715 139,737
Accrued liabilities 139,766 119,173
Accrued interest payable 39,128 39,004
Derivative instruments 0 60,469
Advances from joint interest partners 5,816 7,597
Other current liabilities 0 10,490
Total current liabilities 340,682 381,115
Long-term debt 2,359,683 2,297,214
Deferred income taxes 527,181 513,529
Asset retirement obligations 51,059 48,985
Derivative instruments 0 11,714
Other liabilities 5,506 2,918
Total liabilities 3,284,111 3,255,475
Commitments and contingencies
Stockholders’ equity    
Common stock, $0.01 par value: 450,000,000 shares authorized; 238,642,598 shares issued and 237,410,395 shares outstanding at June 30, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 2,345 2,331
Treasury stock, at cost: 1,232,203 and 856,892 shares at June 30, 2017 and December 31, 2016, respectively (21,401) (15,950)
Additional paid-in capital 2,362,084 2,345,271
Retained earnings 634,582 591,505
Total stockholders’ equity 2,977,610 2,923,157
Total liabilities and stockholders’ equity $ 6,261,721 $ 6,178,632