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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 16, 2019	Apr. 17, 2019	Nov. 09, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance (in shares)				2,526,858	146,516	11,815,748
Common stock awards reserved (in shares)					145,202
Compensation expense	$ 58.7	$ 39.0	$ 22.3
Unrecognized compensation expense	$ 56.5
Unrecognized compensation expense, period of recognition	1 year 8 months 12 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of performance shares granted (in dollars per share)	$ 165.28	$ 129.40	$ 134.65
Weighted average grant date fair value (in dollars per share)	$ 129.58	124.83
Granted (in shares)	168,763
Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Restricted Stock Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of performance shares granted (in dollars per share)	$ 188.11	147.53	$ 124.48
Weighted average grant date fair value (in dollars per share)	$ 156.56	143.48
Granted (in shares)	175,546
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of performance shares granted (in dollars per share)	$ 35.33
Weighted average grant date fair value (in dollars per share)	$ 32.65	$ 30.32
Granted (in shares)	94,256		0

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