Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets

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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 20,335 $ 15,800
Receivables:    
Oil and natural gas sales 93,937 96,752
Joint interest and other 27,588 27,984
Income tax 3,155 3,120
Total receivables 124,680 127,856
Prepaid expenses and other assets 27,015 29,946
Total current assets 172,030 173,602
Property and equipment - at cost:    
Oil and natural gas properties and equipment (full cost method, of which $118,125 at March 31, 2014 and $116,612 at December 31, 2013 were excluded from amortization) 7,443,733 7,339,097
Furniture, fixtures and other 21,633 21,431
Total property and equipment 7,465,366 7,360,528
Less accumulated depreciation, depletion and amortization 5,202,966 5,084,704
Net property and equipment 2,262,400 2,275,824
Restricted deposits for asset retirement obligations 39,961 37,421
Other assets 20,213 20,455
Total assets 2,494,604 2,507,302
Current liabilities:    
Accounts payable 115,344 145,212
Undistributed oil and natural gas proceeds 38,312 42,107
Asset retirement obligations 68,679 77,785
Accrued liabilities 43,698 28,000
Total current liabilities 266,033 293,104
Long-term debt, less current maturities 1,193,847 1,205,421
Asset retirement obligations, less current portion 285,720 276,637
Deferred income taxes 188,183 178,142
Other liabilities 13,497 13,388
Commitments and contingencies      
Shareholders' equity:    
Preferred stock, $0.00001 par value; 20,000,000 shares authorized; 0 issued at March 31, 2014 and December 31, 2013      
Common stock, $0.00001 par value; 118,330,000 shares authorized; 78,503,419 issued and 75,634,246 outstanding at March 31, 2014; 78,460,872 issued and 75,591,699 outstanding at December 31, 2013 1 1
Additional paid-in capital 406,752 403,564
Retained earnings 164,738 161,212
Treasury stock, at cost (24,167) (24,167)
Total shareholders' equity 547,324 540,610
Total liabilities and shareholders' equity $ 2,494,604 $ 2,507,302