Income Taxes - Details of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Gross [Abstract]
Depreciation And Amortization	$ 24,179	$ 37,912
Compensation and Benefits	90,787	85,567
Deferred Tax Assets, Operating Lease	80,446	58,497
Other	21,478	20,617
Total Deferred Tax Assets	353,262	343,858
Deferred Tax Liabilities, Gross [Abstract]
Deferred Tax Liability, Operating Lease	63,460	46,682
Goodwill, Intangible Assets and Other	12,873	19,012
Total Deferred Tax Liabilities	76,333	65,694
Net Deferred Tax Assets Before Valuation Allowance	276,929	278,164
Valuation Allowance	(19,067)	(9,573)
Net Deferred Tax Assets	257,862	268,591
Tax Receivable Agreement [Member]
Deferred Tax Assets, Gross [Abstract]
Step up in tax basis due to the exchange of LP Units for Class A Shares	90,157	99,979
Without Tax Receivable Agreement [Member]
Deferred Tax Assets, Gross [Abstract]
Step up in tax basis due to the exchange of LP Units for Class A Shares	$ 46,215	$ 41,286