Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 35,833	$ 20,374
Average number of common shares outstanding (in shares)	33,296	30,050
Effect of dilutive stock options and restricted stock (in shares)	142	152
Average number of common shares outstanding used to calculate diluted earnings per share (in shares)	33,438	30,202
Options excluded from diluted earnings per share because of their antidilutive effect (in shares)	0	0