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Stock-Based Compensation - Employee Stock Purchase Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total proceeds (in thousands)	$ 8,861,000	$ 7,227,000	$ 4,922,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	148,864	186,855	188,390
Weighted average purchase price (in dollars per share)	$ 59.52	$ 38.68	$ 26.13
Total proceeds (in thousands)	$ 8,861,000	$ 7,227,000	$ 4,922,000
Unrecognized compensation expense	$ 129,438
Unrecognized compensation expense, period for recognition (years)	14 days

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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