Income Taxes - Narrative - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset Partnership Outside Basis	$ 26,800		$ 16,600
Liability under tax receivable agreement	$ 311,342	$ 278,865
Percent of tax benefits realized that the company must make payments to holders for	85.00%
Named Executive Officers and Members of the Board of Directors
Operating Loss Carryforwards [Line Items]
Liability under tax receivable agreement	$ 61,800	$ 56,800