Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) 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	$ 31,364	$ 28,362	$ 51,738	$ 62,011
Average number of common shares outstanding (in shares)	33,561	29,719	31,815	29,723
Effect of dilutive stock options and restricted stock (in shares)	144	185	148	181
Average number of common shares outstanding used to calculate diluted earnings per share (in shares)	33,705	29,904	31,963	29,904
Options excluded from diluted earnings per share because of their antidilutive effect (in shares)	0	0	0	0