XML 66 R56.htm IDEA: XBRL DOCUMENT v3.19.1
Stock Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized stock option compensation cost $ 900  
Stock compensation expense 907 $ 838
Stock compensation expense, stock option 0 200
Stock compensation expense, Performance based and restricted share $ 0 $ 600
Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average recognition period 1 year 6 months  
Total fair value of performance-based awards, vested $ 300  
Stock compensation expense $ 100  
Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average recognition period 2 years 3 months 18 days  
Total fair value of performance-based awards, vested $ 0  
Stock compensation expense $ 800  
Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares available for grant 0  
Weighted-average recognition period [1] 1 year 6 months  
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 952,329  
[1] Represents the target number of shares to be issued for each performance-based award.