Commitments and Contingencies - Additional Information (Details) ¥ in Billions		2 Months Ended	12 Months Ended
	Oct. 30, 2020 USD ($)	May 03, 2019 USD ($)	Dec. 31, 2020 USD ($) contract	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Feb. 29, 2020 USD ($)	Jul. 26, 2019 USD ($)	Apr. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 JPY (¥)	Jun. 24, 2016 USD ($)
Other Commitments [Line Items]
Unfunded Commitments for Capital Contributions			$ 11,975,000
Short-Term Borrowings			0	$ 30,000,000	$ 30,000,000
Contractual Obligations Related To Tax Receivable Agreements			86,751,000
Payment To Counterparties To Tax Receivable Agreement Within One Year Or Less			9,891,000
Payment To Counterparties To Tax Receivable Agreement One To Three Years			20,586,000
Payment To Counterparties To Tax Receivable Agreement Three To Five Years			19,572,000
Payment To Counterparties To Tax Receivable Agreement After Five Years			36,702,000
Cash Paid For Contingent Consideration			81,000	2,008,000
Business Combination, Contingent Consideration, Liability			274,000
Asset Acquisition, Contingent Consideration, Liability				4,463,000
Asset Acquisition Contingent Consideration Arrangements Change In Amounts Of Contingent Consideration Liability				400,000	$ 3,971,000
Derivative Asset, Notional Amount						$ 38,908,000		$ 14,815,000
Derivative, Gain (Loss) on Derivative, Net			$ (3,998,000)	$ 59,000
Number of Foreign Currency Derivatives Held | contract			0
Foreign Exchange Forward [Member]
Other Commitments [Line Items]
Derivative Asset, Notional Amount									$ 35,598,000	¥ 3.8
Secured Line of Credit [Member] | PNC Bank [Member]
Other Commitments [Line Items]
Maximum Borrowing Capacity											$ 30,000,000
Amount Outstanding During Period		$ 30,000,000
Secured Line of Credit [Member] | PNC Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]
Other Commitments [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Unsecured Line of Credit [Member] | PNC Bank [Member]
Other Commitments [Line Items]
Maximum Borrowing Capacity	$ 30,000,000						$ 20,000,000
Short-Term Borrowings			$ 0
Unsecured Line of Credit [Member] | PNC Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]
Other Commitments [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.80%