Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.1
Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of restricted stock unit awards that vested during the period 330  
Fair value of restricted shares that vested during the period $ 5.6 $ 1.2
Compensation expense recognized during the period 4.2 4.2
Income tax benefit (cost) related to restricted stock awards $ 0.8 $ (0.1)
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 100 10
Fair value of restricted shares that vested during the period $ 1.7 $ 0.3
Accumulated dividends paid upon vesting of restricted stock unit awards 0.3 0.1
Compensation expense recognized during the period 0.9 0.5
Income tax benefit (cost) related to restricted stock awards $ 0.3 $ (0.1)