Earnings Per Share - Basic and Diluted Weighted Average Shares Outstanding Used to Compute Earnings Per Share (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share Basic And Diluted [Abstract]
Basic weighted average shares outstanding	37,508	37,359	37,083
Dilutive effect of stock options and restricted stock	589	785	873
Diluted weighted average shares outstanding	38,097	38,144	37,956
Basic earnings per share	$ 6.88	$ 8.01	$ 5.53
Diluted earnings per share	$ 6.77	$ 7.85	$ 5.40