Share-Based Compensation - Unrecognized Compensation Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Unrecognized Share Based Compensation Expense [Line Items]
Unrecognized Expense	$ 139,818
Stock options
Unrecognized Share Based Compensation Expense [Line Items]
Unrecognized Expense	$ 12,059
Average Expected Recognition Period - in Years	2 years 3 months 3 days
Restricted stock units and awards
Unrecognized Share Based Compensation Expense [Line Items]
Unrecognized Expense	$ 127,759
Average Expected Recognition Period - in Years	2 years 7 months 24 days