Offsetting Assets and Liabilities - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Securities loaned
Gross Amounts of Recognized Liabilities		$ 272,580
Gross Amounts Offset in the Statement of Financial Condition		0
Net Amounts of Liabilities Presented in the Statement of Financial Condition		272,580
Financial Instruments Collateral		(267,053)
Cash Collateral Pledged		0
Net Amount		5,527
Derivatives
Cash Collateral Pledged	$ (1,600)	(4,200)
Securities loaned
Securities loaned
Gross Amounts of Recognized Liabilities	118,713
Gross Amounts Offset in the Statement of Financial Condition	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	118,713
Financial Instruments Collateral	(115,811)
Cash Collateral Pledged	0
Net Amount	2,902
Derivatives
Derivatives
Gross Amounts of Recognized Liabilities	10,722	13,712
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	10,722	13,712
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(1,636)	(4,158)
Net Amount	$ 9,086	$ 9,554