Derivatives - Fair Values of Derivatives Reported on Condensed Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 3,533	$ 14,783
Derivative assets, amounts not netted: cash collateral	0	0
Derivative assets, amounts not netted: securities collateral	0	0
Derivative assets, fair value, total	2,789	14,554
Derivative assets, notional amount	288,113	325,129
Derivative liabilities, fair value	379,557	327,390
Derivative liabilities, amounts not netted: cash collateral	(243)	0
Derivative liabilities, amounts not netted: securities collateral	0	0
Derivative liabilities, fair value, total	368,430	327,160
Derivative liabilities, notional	640,734	479,122
Forward foreign currency exchange rate contracts
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	3,400	1,356
Derivative assets fair value counterparty and cash collateral netting	(604)	(157)
Derivative assets, notional amount	283,635	170,103
Derivative liabilities, fair value	1,847	921
Derivative liabilities, fair value, counterparty and cash collateral netting	(603)	(158)
Derivative liabilities, notional	170,704	128,098
Total return swaps and other
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	133	13,427
Derivative assets fair value counterparty and cash collateral netting	(140)	(72)
Derivative assets, notional amount	4,478	155,026
Derivative liabilities, fair value	12,290	72
Derivative liabilities, fair value, counterparty and cash collateral netting	(10,281)	(72)
Derivative liabilities, notional	117,139	1,398
LGAC Warrants
Derivatives, Fair Value [Line Items]
Derivative assets, fair value		0
Derivative assets, notional amount		0
Derivative liabilities, fair value		115
Derivative liabilities, notional		11,500
LFI and other similar deferred compensation arrangements
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0	0
Derivative assets, notional amount	0	0
Derivative liabilities, fair value	365,420	326,282
Derivative liabilities, notional	352,891	338,126
Net derivatives in "other assets" and "other liabilities"
Derivatives, Fair Value [Line Items]
Derivative assets, net derivatives	2,789	14,554
Derivative liabilities, net derivatives	$ 368,673	$ 327,160