Assets Purchased under Resale Agreements and Sold under Repurchase Agreements - Resale Agreements (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Offsetting Assets [Line Items]
Gross resale agreements	$ 635,000,000		$ 635,000,000		$ 760,000,000
Average yield	2.42%	1.96%	2.46%	1.79%
Loans purchased under agreements to resell	$ 0		$ 0		$ 32,200,000
Loans Purchased Under Resale Agreements
Offsetting Assets [Line Items]
Weighted-average yields	7.75%	2.47%	7.27%	1.91%