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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	37,491	37,479	37,485	37,464
Dilutive effect of stock options and restricted stock	83	88	118	202
Diluted weighted average shares outstanding	37,574	37,567	37,603	37,666
Basic earnings per share	$ 1.47	$ 1.58	$ 5.03	$ 5.1
Diluted earnings per share	$ 1.46	$ 1.58	$ 5.01	$ 5.07