Quarterly report pursuant to Section 13 or 15(d)

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

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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Basic:        
Net Income $ 7,586 $ 3,276 $ 15,431 $ 10,342
Less: Distributed and undistributed income (unvested restricted stock) 79 29 157 92
Net income attributable to common shareholders 7,507 3,247 15,274 10,250
Denominator for basic earnings per share-weighted-average shares 14,506 14,462 14,501 14,458
Basic earnings per share-common shareholders $ 0.52 $ 0.23 $ 1.05 $ 0.72
Diluted:        
Net Income 7,586 3,276 15,431 10,342
Less: Distributed and undistributed income (unvested restricted stock) 79 29 157 92
Net income attributable to common shareholders $ 7,507 $ 3,247 $ 15,274 $ 10,250
Denominator for basic earnings per share-weighted-average shares 14,506 14,462 14,501 14,458
Effect of dilutive securities:        
Employee stock options   6   5
Denominator for dilutive earnings per share-weighted-average shares 14,506 14,468 14,501 14,463
Diluted earnings per share-common shareholders $ 0.52 $ 0.23 $ 1.05 $ 0.72