Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 29,117	$ 27,407	$ 45,046	$ 50,582
Less: earnings allocated to participating securities	357	317	510	531
Net income allocated to common shareholders	$ 28,760	$ 27,090	$ 44,536	$ 50,051
Weighted average number of common shares outstanding - basic (in shares)	64,828	50,636	64,397	50,606
Share-based plans (in shares)	161	222	218	215
Weighted average number of common shares outstanding - diluted (in shares)	64,989	50,858	64,615	50,821
Basic earnings per share (in usd per share)	$ 0.44	$ 0.53	$ 0.69	$ 0.99
Diluted earnings per share (in usd per share)	$ 0.44	$ 0.53	$ 0.69	$ 0.98