Quarterly report pursuant to Section 13 or 15(d)

Net Income Per Share (Details)

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Net Income Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Net Income Per Share        
Net income (loss) $ 6,370 $ (2,256) $ 20,884 $ 9,980
Basic weighted average shares outstanding 15,628 15,562 15,603 15,544
Basic net income per common share:        
Net income (loss) per common share (in dollars per share) $ 0.41 $ (0.14) $ 1.34 $ 0.64
Diluted weighted average shares outstanding        
Basic weighted average shares outstanding 15,628 15,562 15,603 15,544
Weighted average stock grants outstanding 343   314 130
Diluted weighted average shares outstanding 15,971 15,562 15,917 15,674
Diluted net income per common share:        
Net income (loss) per common share (in dollars per share) $ 0.40 $ (0.14) $ 1.31 $ 0.64
Potentially dilutive shares excluded from diluted per share amounts:        
Stock options (in shares) 96   96 661
Potentially anti-dilutive shares excluded from diluted per share amounts:        
Stock options (in shares) 167 1,379 249 202