Repurchases of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Equity [Abstract]
Shares repurchased in the open market (in shares)	809	341	1,311	618
Shares acquired through employee surrender for statutory tax withholding (in shares)	0	0	21	28
Total shares repurchased (in shares)	809	341	1,332	646
Cost of shares repurchased in the open market	$ 313,455	$ 188,409	$ 576,238	$ 327,622
Cost of shares for employee surrenders	52	3	10,390	14,986
Total cost of shares	$ 313,507	$ 188,412	$ 586,628	$ 342,608
Average cost per share - open market repurchases (in USD per share)	$ 387.78	$ 552.08	$ 439.63	$ 529.45
Average cost per share - employee surrenders (in USD per share)	369.63	550.59	504.60	544.08
Average cost per share - total (in USD per share)	$ 387.78	$ 552.08	$ 440.63	$ 530.07