Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 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 260,278  
Fair value of restricted shares that vested during the period $ 8,029 $ 5,745
Compensation expense recognized during the period 2,691 2,433
Income tax benefit recognized upon vesting of restricted stock awards $ 2,418 $ 1,002
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 112,070 88,074
Fair value of restricted shares that vested during the period $ 3,554 $ 3,550
Accumulated dividends paid upon vesting of restricted stock unit awards 544 375
Compensation expense recognized during the period 1,420 537
Income tax benefit recognized upon vesting of restricted stock awards $ 821 $ 170