Quarterly report pursuant to Section 13 or 15(d)

Computation of Basic and Diluted Earnings (Loss) Per Share (Detail)

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Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Basic:        
Net Income (loss) $ 7,592 $ 1,835 $ 14,371 $ (5,129)
Less: Net income attributable to participating securities (unvested restricted stock) 70 19 132  
Net income (loss) attributable to common shareholders 7,522 1,816 14,239 (5,129)
Denominator for basic earnings (loss) per share-weighted-average shares 14,388 14,348 14,385 14,346
Basic earnings (loss) per share-common shareholders $ 0.52 $ 0.13 $ 0.99 $ (0.36)
Diluted:        
Net Income (loss) 7,592 1,835 14,371 (5,129)
Less: Net income attributable to participating securities (unvested restricted stock) 70 19 132  
Net income (loss) attributable to common shareholders $ 7,522 $ 1,816 $ 14,239 $ (5,129)
Denominator for basic earnings (loss) per share-weighted-average shares 14,388 14,348 14,385 14,346
Effect of dilutive securities:        
Employee stock options 21 31 24  
Denominator for dilutive earnings (loss) per share-weighted-average shares 14,409 14,379 14,409 14,346
Diluted earnings (loss) per share-common shareholders $ 0.52 $ 0.13 $ 0.99 $ (0.36)