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Earnings per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Numerator:        
Income from continuing operations $ 3,397 $ 5,847 $ 7,657 $ 10,263
Income from discontinued operations 0 401 0 429
Net income $ 3,397 $ 6,248 $ 7,657 $ 10,692
Denominator:        
Weighted average shares of common stock outstanding 11,811 12,069 11,817 12,085
Effect of dilutive common stock equivalents 73 90 74 91
Weighted average shares of common stock outstanding 11,884 12,159 11,891 12,176
Basic earnings per share        
Earnings per share from continuing operations $ 0.29 $ 0.48 $ 0.65 $ 0.85
Earnings per share from discontinued operations 0 0.03 0 0.03
Earnings per share 0.29 0.51 0.65 0.88
Diluted earnings per share        
Earnings per share from continuing operations 0.29 0.48 0.64 0.84
Earnings per share from discontinued operations 0 0.03 0 0.04
Earnings per share $ 0.29 $ 0.51 $ 0.64 $ 0.88