Earnings Per Share - Basic and Diluted Weighted Average Shares Outstanding Used to Compute Earnings Per Share (Detail) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	37,479	37,529	37,464	37,502
Dilutive effect of stock options and restricted stock	88	555	202	612
Diluted weighted average shares outstanding	37,567	38,084	37,666	38,114
Basic earnings per share	$ 1.58	$ 1.54	$ 5.10	$ 5.49
Diluted earnings per share	$ 1.58	$ 1.52	$ 5.07	$ 5.40