Offsetting Assets and Liabilities - Offsetting Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Securities Borrowed [Abstract]
Gross Amounts of Recognized Assets	$ 97,865	$ 19,899
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	97,865	19,899
Financial Instruments Collateral	(93,012)	(18,327)
Cash Collateral Received	0	0
Net Amount	4,853	1,572
Derivative Asset [Abstract]
Cash Collateral Received	(7,800)	(2,900)
Derivatives
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	22,082	15,422
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	22,082	15,422
Financial Instruments Collateral	0	0
Cash Collateral Received	(7,782)	(2,872)
Net Amount	14,300	12,550
Exchange-traded options | Long
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	445	1,893
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	445	1,893
Financial Instruments Collateral	0	0
Cash Collateral Received	0	0
Net Amount	$ 445	$ 1,893