Annual report pursuant to Section 13 and 15(d)

Consolidated Statements Of Income (Loss)

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Consolidated Statements Of Income (Loss) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Consolidated Statements Of Income (Loss) [Abstract]                      
Revenues $ 261,899 $ 245,371 $ 252,922 $ 210,855 $ 186,956 $ 169,575 $ 179,667 $ 169,585 $ 971,047 $ 705,783 $ 610,996
Operating costs and expenses:                      
Lease operating expenses                 219,206 169,670 203,922
Production taxes                 4,275 1,194 1,544
Gathering and transportation                 16,920 16,484 13,619
Depreciation, depletion and amortization                 299,015 268,415 308,076
Asset retirement obligation accretion                 29,771 25,685 34,461
Impairment of oil and natural gas properties                       218,871
General and administrative expenses                 74,296 53,290 42,990
Derivative (gain) loss                 (1,896) 4,256 7,372
Total costs and expenses                 641,587 538,994 830,855
Operating income (loss) 80,936 95,333 115,643 37,548 34,053 36,847 40,178 55,711 329,460 166,789 (219,859)
Interest expense:                      
Incurred                 52,393 43,101 46,749
Capitalized                 (9,877) (5,395) (6,662)
Loss on extinguishment of debt                 22,694   2,926
Interest income                 84 710 842
Income (loss) before income tax expense (benefit)                 264,334 129,793 (262,030)
Income tax expense (benefit)                 91,517 11,901 (74,111)
Net income (loss) $ 46,065 $ 52,928 $ 55,175 $ 18,649 $ 20,519 $ 27,188 $ 27,870 $ 42,315 $ 172,817 $ 117,892 $ (187,919)
Basic and diluted earnings (loss) per common share $ 0.61 [1] $ 0.70 [1] $ 0.73 [1] $ 0.25 [1] $ 0.27 [1] $ 0.36 [1] $ 0.37 [1] $ 0.57 [1] $ 2.29 $ 1.58 $ (2.51)
Weighted average common shares outstanding 74,033       73,685       74,033 73,685 74,852
[1] The sum of the individual quarterly earnings per share may not agree with year-to-date earnings per share because each quarterly calculation is based on the income for that quarter and the weighted average number of shares outstanding during that quarter.