Mortgage Servicing Advances (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Servicing advances	$ 143.2	$ 119.0
Mortgage servicing rights, delinquency rate	0.70%	0.80%
Line of Credit [Member] | Asset Pledged as Collateral
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Servicing advances	$ 79.7	$ 67.8