Earnings Per Share - Summary of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 262,171	$ 217,952	$ 196,247	$ 184,239	$ 480,123	$ 380,486
Denominator for basic earnings per share (in shares)	76,769		83,141		77,250	83,307
Dilutive securities (in shares)	1,470		2,154		1,512	2,221
Denominator for diluted earnings per share (in shares)	78,239		85,295		78,762	85,528
Basic earnings per share (in dollars per share)	$ 3.42		$ 2.36		$ 6.22	$ 4.57
Diluted earnings per share (in dollars per share)	$ 3.35		$ 2.30		$ 6.10	$ 4.45