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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Basic:        
Net income $ 4,310 $ 4,279 $ 7,845 $ 7,066
Less: Distributed and undistributed income (unvested restricted stock) 44 38 80 61
Net income attributable to common shareholders 4,266 4,241 7,765 7,005
Denominator for basic earnings per share-weighted-average shares 14,500 14,457 14,498 14,456
Basic earnings per share-common shareholders $ 0.30 $ 0.30 $ 0.54 $ 0.49
Diluted:        
Net income 4,310 4,279 7,845 7,066
Less: Distributed and undistributed income (unvested restricted stock) 44 38 80 61
Net income attributable to common shareholders $ 4,266 $ 4,241 $ 7,765 $ 7,005
Denominator for basic earnings per share-weighted-average shares 14,500 14,457 14,498 14,456
Effect of dilutive securities:        
Employee stock options   3   3
Denominator for dilutive earnings per share-weighted-average shares 14,500 14,460 14,498 14,459
Diluted earnings per share-common shareholders $ 0.30 $ 0.30 $ 0.54 $ 0.49