Earnings Per Share - Summary of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 147,060	$ 172,107
Denominator for basic earnings per share (in shares)	84,902	85,941
Dilutive securities (in shares)	3,303	3,303
Denominator for diluted earnings per share (in shares)	88,205	89,244
Basic earnings per share (in dollars per share)	$ 1.73	$ 2.00
Diluted earnings per share (in dollars per share)	$ 1.67	$ 1.93