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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	37,023	37,527	37,207	37,641
Dilutive effect of stock options and full value awards	86	81	81	55
Diluted weighted average shares outstanding	37,109	37,608	37,288	37,696
Basic earnings per share	$ 1.84	$ 1.9	$ 4.15	$ 5.55
Diluted earnings per share	$ 1.84	$ 1.9	$ 4.14	$ 5.55