Weighted Average Shares - Calculation of Weighted Average Shares (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	176,463	173,489	171,194
Effect of dilutive stock options	3,453	3,103	4,075
Diluted weighted-average common and common-equivalent shares outstanding	179,916	176,592	175,269