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Related Parties - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Oct. 26, 2015 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |  |
Fees receivable |  | $ 491,861 | $ 669,464 |
Provision (benefit) pursuant to tax receivable agreement |  | $ (1,209) | 2,199 | $ (439)
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 |  | $ 592,985 | $ 708,900 | $ 564,686
Type of Revenue [Extensible List] |  | Asset Management Fees [Member] | Asset Management Fees [Member] | Asset Management Fees [Member]
Fees receivable |  |  | $ 57,283 | $ 96,740
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% |  |  |
Provision (benefit) pursuant to tax receivable agreement |  | $ (1,209) | 2,199 | $ (439)
Cumulative liability relating to obligations under Amended and Restated Tax Receivable Agreement |  | $ 191,189 | $ 213,434 |

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