Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of restricted stock unit awards that vested during the period 307,107  
Fair value of restricted shares that vested during the period $ 8,700 $ 7,630
Compensation expense recognized during the period 5,403 4,869
Income tax benefit recognized upon vesting of restricted stock awards $ 2,620 $ 1,473
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 117,500 88,074
Fair value of restricted shares that vested during the period $ 3,634 $ 3,550
Accumulated dividends paid upon vesting of restricted stock unit awards 563 375
Compensation expense recognized during the period 3,029 1,777
Income tax benefit recognized upon vesting of restricted stock awards $ 526 $ 170