Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands |
Feb. 05, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|---|
| Commitment And Contingencies [Line Items] | |||
| Investment commitments | $ 754,000 | ||
| Derivative maximum risk of loss for credit protection | 17,000 | $ 17,000 | |
| Parties settlement | $ 9,650 | ||
| Amount of securities on loan subject to indemnification | 286,000,000 | ||
| Collateral for indemnified securities | 304,000,000 | ||
| Other Liabilities [Member] | |||
| Commitment And Contingencies [Line Items] | |||
| Contingent consideration at fair value | $ 64,000 |