Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Related Party Transactions - Transactions with Cantor Commercial Real Estate, L.P. (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
	Aug. 16, 2019	Jul. 22, 2019	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party
Related Party Transaction
Mortgage servicing right recognized			$ 0.5	$ 0.6	$ 1.7	$ 2.1
Barry M. Gosin \| Third Party Bank And Cantor Commercial Real Estate LP
Related Party Transaction
Ownership interest of loans receivable (in percentage)		19.00%
Amount of loan purchased by third-party (in percentage)	80.00%
Amount of loan retained by third-party (in percentage)	20.00%
Interest rate on loans receivable (in percentage)	4.38%
Barry M. Gosin \| Real Estate Loan \| Third Party Bank And Cantor Commercial Real Estate LP
Related Party Transaction
Commercial real estate loan		$ 146.6