Assets Purchased under Resale Agreements and Sold under Repurchase Agreements - Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets, Resale Agreements
Gross Amounts of Recognized Assets	$ 892,986	$ 2,353,503
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented on the Consolidated Balance Sheet	892,986	2,353,503
Assets Purchased under Agreements to Resell Gross Amounts Not Offset [Abstract]
Collateral Received	(810,574)	(2,327,687)
Net Amount	82,412	25,816
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	611,785	300,000
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	611,785	300,000
Assets Sold under Agreements to Repurchase Gross Amounts Not Offset [Abstract]
Collateral Pledged	(606,766)	(300,000)
Net Amount	$ 5,019	$ 0