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Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Line Items]        
Weighted average shares for diluted earnings per share   25,704,931    
Shares excluded from calculation of diluted earnings per share 300,000 512,500 300,000 512,500
Restricted Stock Diluted        
Earnings Per Share [Line Items]        
Non-vested restricted stock and options   138,261    
Stock Options Diluted        
Earnings Per Share [Line Items]        
Non-vested restricted stock and options   102,676