Quarterly report pursuant to Section 13 or 15(d)

Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail)

v3.21.2
Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of restricted stock unit awards that vested during the period 115,712  
Fair value of restricted shares that vested during the period $ 2,491 $ 8,944
Compensation expense recognized during the period 13,757 8,235
Income tax benefit (cost) related to restricted stock awards $ (105) $ 2,678
Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of restricted stock unit awards that vested during the period 15,230 120,293
Fair value of restricted shares that vested during the period $ 314 $ 3,669
Accumulated dividends paid upon vesting of restricted stock unit awards 62 576
Compensation expense recognized during the period 2,832 4,624
Income tax benefit (cost) related to restricted stock awards $ (467) $ 215