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Derivatives - Fair Values of Derivatives Reported on Consolidated Statements of Financial Condition (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |  |
Derivative Assets, Fair Value |  | $ 14,783 | $ 2,057
Derivative Assets, Notional |  | 325,129 | 273,947
Derivative Liabilities, Fair Value |  | 327,390 | 383,352
Derivative Liabilities, Notional |  | 479,122 | 571,234
Derivative Assets, Fair Value, Total |  | 14,554 | 922
Derivative Liabilities, Fair Value, Amounts not netted, Cash collateral | [1] |  | (2,476)
Derivative Liabilities, Fair Value, Amounts not netted, Securities collateral | [1] |  | (391)
Derivative Liabilities, Fair Value, Total |  | 327,160 | 369,378
Total Return Swaps and Other [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Assets, Fair Value |  | 13,427 | 1,052
Derivative Assets, Notional |  | 155,026 | 20,888
Derivative Liabilities, Fair Value |  | 72 | 13,709
Derivative Liabilities, Notional |  | 1,398 | 83,706
Derivative Assets, Fair Value, Counterparty and cash collateral netting |  | (72) | (1,052)
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting |  | (72) | (11,024)
Forward Foreign Currency Exchange Rate Contracts [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Assets, Fair Value |  | 1,356 | 1,005
Derivative Assets, Notional |  | 170,103 | 253,059
Derivative Liabilities, Fair Value |  | 921 | 761
Derivative Liabilities, Notional |  | 128,098 | 174,550
Derivative Assets, Fair Value, Counterparty and cash collateral netting |  | (157) | (83)
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting |  | (158) | (83)
LGAC Warrants [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Liabilities, Fair Value |  | 115 | 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 |  | 326,282 | 358,877
Derivative Liabilities, Notional |  | 338,126 | 301,478
Net derivatives in "other assets" and "other liabilities" [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Assets, Fair Value, Counterparty and cash collateral netting |  | 14,554 | 922
Derivative Liabilities, Fair Value, Counterparty and cash collateral netting |  | $ 327,160 | $ 372,245
[1] | Amounts are subject to master netting arrangements but do not meet the criteria for netting on the consolidated statements of financial condition under U.S. GAAP. For some counterparties, the collateral amounts of securities and cash collateral pledged may exceed the derivative assets and derivative liabilities balances. Where this is the case, the total amount reported is limited to the net derivative assets and net derivative liabilities balances with that counterparty.

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- Definition Amount of counterparty and cash collateral netting offset against gross derivative asset. + References No definition available. + Details
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- Definition Derivative fair value of derivative liability amount offset against counterparty and cash collateral netting. + References No definition available. + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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