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Derivatives - Fair Values of Derivatives Reported on Condensed Consolidated Statements of Financial Condition (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Derivatives Fair Value [Line Items] |  |
Derivative Assets, Fair Value | $ 20,849 | $ 2,057
Derivative Assets, Notional | 347,859 | 273,947
Derivative Liabilities, Fair Value | 349,461 | 383,352
Derivative Liabilities, Notional | 554,063 | 571,234
Derivative Assets, Fair Value, Counterparty and cash collateral netting | 19,098 | 922
Derivative Assets, Fair Value, Total | 19,098 | 922
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting | 349,211 | 372,245
Derivative Liabilities, Fair Value, Amounts not netted, Cash collateral |  | (2,476)
Derivative Liabilities, Fair Value, Total | 349,211 | 369,378
Derivative Liabilities, Fair Value, Amounts not netted, Securities collateral |  | (391)
Forward Foreign Currency Exchange Rate Contracts [Member] |  |
Derivatives Fair Value [Line Items] |  |
Derivative Assets, Fair Value | 2,337 | 1,005
Derivative Assets, Notional | 200,572 | 253,059
Derivative Liabilities, Fair Value | 690 | 761
Derivative Liabilities, Notional | 172,454 | 174,550
Derivative Assets, Fair Value, Counterparty and cash collateral netting | (21) | (83)
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting | (21) | (83)
Total Return Swaps and Other [Member] |  |
Derivatives Fair Value [Line Items] |  |
Derivative Assets, Fair Value | 18,512 | 1,052
Derivative Assets, Notional | 147,287 | 20,888
Derivative Liabilities, Fair Value | 229 | 13,709
Derivative Liabilities, Notional | 3,372 | 83,706
Derivative Assets, Fair Value, Counterparty and cash collateral netting | (1,730) | (1,052)
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting | (229) | (11,024)
LGAC Warrants [Member] |  |
Derivatives Fair Value [Line Items] |  |
Derivative Liabilities, Fair Value | 2,875 | 10,005
Derivative Liabilities, Notional | 11,500 | 11,500
LFI and Other Similar Deferred Compensation Arrangements [Member] |  |
Derivatives Fair Value [Line Items] |  |
Derivative Liabilities, Fair Value | 345,667 | 358,877
Derivative Liabilities, Notional | 366,737 | 301,478
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting | 345,667 | 358,877
Total in "other assets" and "other liabilities" [Member] |  |
Derivatives Fair Value [Line Items] |  |
Derivative Assets, Fair Value, Counterparty and cash collateral netting | 19,098 | 922
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting | $ 349,211 | $ 372,245

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