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Earnings per Share - Earnings per Basic and Diluted Weighted Average Common Share Outstanding for Continuing and Discontinued Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Abstract]          
Income from continuing operations $ 3,182 $ (1,211) $ 5,547 $ 1,971 $ 16,523
Income (loss) from discontinued operations 10 (10,893) 14 (10,883) (1,456)
Net income (loss) $ 3,192 $ (12,104) $ 5,561 $ (8,912) $ 15,067
Basic weighted-average common shares outstanding 9,513   9,443 9,510 9,440
Effect of potentially dilutive common shares 92   38 86 34
Diluted weighted-average common shares outstanding 9,605   9,481 9,596 9,474
Earnings (loss) per basic common share          
Continuing operations $ 0.34   $ 0.59 $ 0.21 $ 1.75
Discontinued operations       $ (1.15) $ (0.15)
Total $ 0.34 $ (1.27) $ 0.59 $ (0.94) $ 1.60
Earnings (loss) per diluted common share          
Continuing operations $ 0.33   $ 0.59 $ 0.21 $ 1.74
Discontinued operations       $ (1.14) $ (0.15)
Total $ 0.33 $ (1.27) $ 0.59 $ (0.93) $ 1.59
Antidilutive shares not included in diluted common share calculation 66   95 66 124