Quarterly report pursuant to Section 13 or 15(d)

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

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Earnings Per Share - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Basic:        
Net income (loss) $ 3,276 $ (10,372) $ 10,342 $ 3,999
Less: Distributed loss/distributed and undistributed income (unvested restricted stock) 29   92 34
Net income (loss) attributable to common shareholders 3,247 (10,372) 10,250 3,965
Denominator for basic earnings (loss) per share-weighted-average shares 14,462 14,408 14,458 14,393
Basic earnings (loss) per share - common shareholders $ 0.23 $ (0.72) $ 0.72 $ 0.28
Diluted:        
Net income (loss) 3,276 (10,372) 10,342 3,999
Less: Distributed loss/distributed and undistributed income (unvested restricted stock) 29   92 34
Net income (loss) attributable to common shareholders $ 3,247 $ (10,372) $ 10,250 $ 3,965
Denominator for basic earnings (loss) per share-weighted-average shares 14,462 14,408 14,458 14,393
Effect of dilutive securities:        
Employee stock options 6   5 24
Denominator for dilutive earnings per share-weighted-average shares 14,468 14,408 14,463 14,417
Diluted earnings (loss) per share - common shareholders $ 0.23 $ (0.72) $ 0.72 $ 0.28