Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 19,805	$ 15,929
Less: earnings allocated to participating securities	196	164
Net income allocated to common shareholders	$ 19,609	$ 15,765
Weighted average number of common shares outstanding - basic (in shares)	64,966	63,961
Share-based plans (in shares)	262	277
Weighted average number of common shares outstanding - diluted (in shares)	65,228	64,238
Basic earnings per share (in usd per share)	$ 0.30	$ 0.25
Diluted earnings per share (in usd per share)	$ 0.30	$ 0.25