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Stock Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 10, 2015
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Amount of limitation on deductibility under Section 162(m) of Internal Revenue Code (in dollars) $ 1,000,000        
Total intrinsic value of stock options exercised       $ 600,000 $ 900,000
Unrecognized stock option compensation cost   $ 3,900,000   3,900,000  
Stock compensation expense   800,000 $ 713,000 1,523,000 1,439,000
Stock compensation expense, stock option   600,000 623,000.0 1,200,000 1,300,000
Stock compensation expense, Performance based and restricted share   200,000 $ 90,000.0 $ 300,000 $ 168,000.0
Stock compensation expense, stock awards granted in 2015   $ 53,000      
Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Increase shares available for grant under the plan 650,000        
Shares available for awards   636,560   636,560  
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average recognition period       2 years 3 months 18 days  
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average recognition period       3 years  
Total fair value of restricted stock vested       $ 350,000  
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average recognition period       2 years 6 months  
Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares range percentage   150.00%