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Earnings per Share (Earnings per Share) (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Numerator:        
Income from continuing operations $ 6,065 $ 5,402 $ 13,722 $ 15,665
Income from discontinued operations   104   533
Net income $ 6,065 $ 5,506 $ 13,722 $ 16,198
Denominator:        
Weighted average shares of common stock outstanding 11,848 11,923 11,839 12,028
Effect of dilutive common stock equivalents 100 97 86 94
Weighted average shares of common stock outstanding 11,948 12,020 11,925 12,122
Basic earnings per share        
Earnings per share from continuing operations $ 0.51 $ 0.45 $ 1.16 $ 1.30
Earnings per share from discontinued operations   0.01   0.05
Earnings per share 0.51 0.46 1.16 1.35
Diluted earnings per share        
Earnings per share from continuing operations 0.51 0.45 1.15 1.29
Earnings per share from discontinued operations   0.01   0.05
Earnings per share $ 0.51 $ 0.46 $ 1.15 $ 1.34