Stockholders' Equity - Shares of Common Stock Issued Under Employee Stock Purchase Plan (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of shares available, beginning balance (in shares)			152,344
Shares issued during period (in shares)	13,792	14,313	19,895
Number of shares available, ending balance (in shares)	104,344
Weighted average per share price of shares issued (in dollars per share)	$ 186.20	$ 152.10	$ 103.84