XML 69 R59.htm IDEA: XBRL DOCUMENT v3.21.2
Share-based Compensation - Summary of RSA Activity (Detail) - Restricted Stock [Member] - $ / shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Non-vested units at January 1, 2021     266  
Granted     175  
Vested     (72)  
Forfeited     (14)  
Non-vested units at September 30, 2021 355   355  
Weighted Average Grant Date Fair Value, Non-vested units at January 1, 2020     $ 19.34  
Weighted Average Grant Date Fair Value, Granted $ 53.61 $ 17.65 33.19 $ 18.79
Weighted Average Grant Date Fair Value, Vested     17.15  
Weighted Average Grant Date Fair Value, Forfeited     23.60  
Weighted Average Grant Date Fair Value Non-vested units at September 30, 2020 $ 26.44   $ 26.44