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Stock Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total intrinsic value of stock options exercised     $ 900,000 $ 600,000
Unrecognized stock option compensation cost $ 2,200,000   2,200,000  
Stock compensation expense 500,000 $ 800,000 1,290,000 1,523,000
Stock compensation expense, stock option 200,000 600,000 700,000 1,200,000
Stock compensation expense, Performance based and restricted share $ 300,000 $ 200,000 600,000 300,000
Stock compensation expense, stock awards granted     $ 32,000 $ 53,000
Amended and Restated Long Term Incentive Plan Two Thousand        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant 403,279   403,279  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average recognition period     2 years  
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average recognition period     3 years 1 month 6 days  
Total fair value of restricted stock vested     $ 658,300  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average recognition period [1]     2 years 1 month 6 days  
Performance Shares | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares range percentage     150.00%  
[1] Represents the target number of shares to be issued for each performance-based award.