Assets Purchased under Resale Agreements and Sold under Repurchase Agreements - Resale Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Gross resale agreements	$ 760.0	$ 1,330.0
Loans purchased under agreements to resell	$ 32.2	$ 1,020.0
Securities Purchased under Agreements to Resell, Average Yield	2.12%	1.53%	1.94%
Loans Purchased Under Resale Agreements
Offsetting Assets [Line Items]
Weighted average yield (as a percent)	2.16%	1.53%	2.27%