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Related Parties - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 26, 2015 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |  |  |  |
Fees receivable |  | $ 582,960 |  | $ 582,960 |  | $ 669,464
Payments under tax receivable agreement |  |  |  | 20,961 | $ 10,215 |
LTBP Trust [Member] |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount of cash savings in income or franchise tax that would be realized as a result of increases in tax basis and certain other tax benefits related to the amended and restated tax receivable agreement | 45.00% |  |  |  |  |
Cash tax saving that may arise from tax basis increases attributable to payments under the amended and restated tax receivable agreement | 85.00% |  |  |  |  |
Cumulative liability relating to obligations under Amended and Restated Tax Receivable Agreement |  | 192,473 |  | 192,473 |  | 213,434
Payments under tax receivable agreement |  |  |  | $ 20,961 |  |
Amended and Restated Tax Receivable Agreement [Member] |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Tax agreement termination year |  |  |  | 2033 |  |
Sponsored Funds [Member] |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Revenue |  | $ 134,342 | $ 186,446 | $ 298,713 | $ 360,124 |
Type of Revenue [Extensible List] |  | Asset Management Fees [Member] | Asset Management Fees [Member] | Asset Management Fees [Member] | Asset Management Fees [Member] |
Fees receivable |  | $ 110,061 |  | $ 110,061 |  | $ 96,740

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