Repurchases of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Shares repurchased in the open market (in shares)	502	277
Shares acquired through employee surrender for statutory tax withholding (in shares)	21	28
Total shares repurchased (in shares)	523	305
Cost of shares repurchased in the open market	$ 262,783	$ 139,213
Cost of shares for employee surrenders	10,338	14,983
Total cost of shares	$ 273,121	$ 154,196
Average cost per share - open market repurchases (in USD per share)	$ 523.04	$ 501.62
Average cost per share - employee surrenders (in USD per share)	505.53	544.08
Average cost per share - total (in USD per share)	$ 522.36	$ 505.45