Summary of Stock Option Activity (Detail) - Stock Option Awards $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Options outstanding, shares
Beginning Balance | shares	1,167
Granted | shares	304
Exercised | shares	(2)
Forfeited/Expired | shares	(3)
Ending Balance | shares	1,466
Exercisable as of March 31, 2022 | shares	698
Expected to vest as of March 31, 2022 | shares	768
Total | shares	1,466
Weighted Average Exercise Price Per Share
Beginning Balance | $ / shares	$ 268.74
Granted | $ / shares	404.60
Exercised | $ / shares	129.23
Forfeited/Expired | $ / shares	445.94
Ending Balance | $ / shares	296.80
Exercisable as of March 31, 2022 | $ / shares	184.99
Expected to vest as of March 31, 2022 | $ / shares	398.27
Total | $ / shares	$ 296.80
Aggregate Intrinsic Value
Exercised | $	$ 678
Exercisable as of March 31, 2022 | $	223,826
Expected to vest as of March 31, 2022 | $	108,378
Total | $	$ 332,204
Weighted Average Remaining Contractual Term (Years)
Exercisable as of March 31, 2022	4 years
Expected to vest as of March 31, 2022	8 years 10 months 24 days
Total	6 years 7 months 6 days