Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 28,746	$ 22,289	$ 73,792	$ 72,871
Less: earnings allocated to participating securities	339	303	847	839
Net income allocated to common shareholders	$ 28,407	$ 21,986	$ 72,945	$ 72,032
Weighted average number of common shares outstanding - basic (in shares)	64,842	50,637	64,547	50,616
Share-based plans (in shares)	219	238	208	220
Weighted average number of common shares outstanding - diluted (in shares)	65,061	50,875	64,755	50,836
Basic earnings per share (in usd per share)	$ 0.44	$ 0.43	$ 1.13	$ 1.42
Diluted earnings per share (in usd per share)	$ 0.44	$ 0.43	$ 1.13	$ 1.42