Assets Purchased under Resale Agreements and Sold under Repurchase Agreements - Resale Agreements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Offsetting Assets [Line Items]
Gross resale agreements	$ 635.0		$ 760.0
Average yield	2.50%	1.63%
Loans purchased under agreements to resell	$ 19.3		$ 32.2
Loans Purchased Under Resale Agreements
Offsetting Assets [Line Items]
Weighted-average yields	7.12%	1.60%