Share-Based Compensation - Summary of Share-based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Option awards	$ 13,800	$ 21,800	$ 23,400
Other share-based awards	40,900	48,000	28,500
Total share-based compensation before tax	54,700	69,800	51,900
Tax benefit	13,100	16,600	12,300
Total share-based compensation expense included in net income	$ 41,600	$ 53,200	$ 39,600