XML 187 R119.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation (Restricted Stock Awards) - Additional Information (Detail) - Restricted Stock [Member] - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Recognized compensation expenses   $ 2,336   $ 1,722 $ 4,241 $ 3,280  
Total unrecognized compensation expense, Nonvested restricted stock arrangements granted   $ 24,919     $ 24,919   $ 13,666
Recognition of remaining compensation expense over a weighted-average period         3 years 2 months 12 days    
Number of cancelled shares 141,600 1,160 141,600