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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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share [Abstract]        
Income from continuing operations $ 5,858 $ 2,734 $ 7,829 $ 19,257
Loss from discontinued operations (837) (1,718) (11,720) (3,174)
Net income (loss) $ 5,021 $ 1,016 $ (3,891) $ 16,083
Basic weighted-average common shares outstanding 9,519 9,449 9,513 9,443
Effect of potentially dilutive common shares 97 68 82 55
Diluted weighted-average common shares outstanding 9,616 9,517 9,595 9,498
Earnings (loss) per basic common share        
Continuing operations $ 0.62 $ 0.29 $ 0.82 $ 2.04
Discontinued operations $ (0.09) $ (0.18) $ (1.23) $ (0.34)
Total $ 0.53 $ 0.11 $ (0.41) $ 1.70
Earnings (loss) per diluted common share        
Continuing operations $ 0.61 $ 0.29 $ 0.82 $ 2.03
Discontinued operations $ (0.09) $ (0.18) $ (1.23) $ (0.34)
Total $ 0.52 $ 0.11 $ (0.41) $ 1.69
Antidilutive shares not included in diluted common share calculation 65 93 65 97