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Earnings Per Common Share - Summary of Reconciliation of Earnings (Loss) Per Common Share (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
Basic Earnings (Loss) per Common Share:        
Net income (loss) $ (1,985) $ (795) $ (6,651) $ 778
Distributed earnings to common shares   754 1,553 2,260
Distributed earnings to participating securities   46 101 142
Total distributed earnings   800 1,654 2,402
Undistributed loss allocable to common shares (1,985) (1,595) (8,305) (1,624)
Undistributed earnings allocable to participating securities            
Total undistributed loss (1,985) (1,595) (8,305) (1,624)
Earnings (loss) to common shares-basic (1,985) (841) (6,752) 636
Weighted average common shares outstanding-basic 7,176 6,860 7,097 6,850
Basic earnings (loss) per common share $ (0.28) $ (0.12) $ (0.95) $ 0.09
Diluted Earnings (Loss) per Common Share:        
Earnings (loss) to common shares-basic (1,985) (841) (6,752) 636
Undistributed earnings allocated to participating securities            
Undistributed earnings reallocated to participating securities            
Earnings (loss) to common shares-diluted $ (1,985) $ (841) $ (6,752) $ 636
Weighted average common shares outstanding-basic 7,176 6,860 7,097 6,850
Dilutive effect of stock options       230
Weighted average common shares outstanding-dilutive 7,176 6,860 7,097 7,080
Diluted earnings (loss) per common share $ (0.28) $ (0.12) $ (0.95) $ 0.09