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Stock Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized stock option compensation cost $ 1,700   $ 1,700  
Stock compensation expense 1,200 $ 900 2,100 $ 1,759
Stock compensation expense, stock option 100 200 300 400
Stock compensation expense, Performance based and restricted share $ 1,100 $ 700 $ 1,800 $ 1,400
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average recognition period     1 year 9 months 18 days  
Fair value of time-based restricted stock     $ 1,400  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average recognition period [1]     1 year 10 months 24 days  
Total fair value of performance-based awards, vested     $ 600  
Number of shares range percentage     150.00%  
Performance Shares | Amended and Restated Long Term Incentive Plan Two Thousand        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant 152,342   152,342  
[1] Represents the target number of shares to be issued for each performance-based award.