Offsetting Assets and Liabilities - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Securities Loaned [Abstract]
Gross Amounts of Recognized Liabilities	$ 272,580	$ 23,911
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	272,580	23,911
Financial Instruments Collateral	(267,053)	(23,373)
Cash Collateral Pledged		0
Net Amount	5,527	538
Derivative Liability [Abstract]
Cash Collateral Pledged	(4,200)	(5,600)
Derivatives
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	13,712	16,923
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	13,712	16,923
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(4,158)	(5,572)
Net Amount	9,554	11,351
Exchange-traded options | Short exchange-traded options(1)
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	0	2,774
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	0	2,774
Financial Instruments Collateral	0	0
Cash Collateral Pledged	0	0
Net Amount	$ 0	$ 2,774