Commitments and Contingencies (Details) $ in Millions	Sep. 30, 2023 USD ($)
Commitments | Commercial and Residential Lending Segment
Property, Plant and Equipment [Line Items]
Value of loans with future funding commitments	$ 1,800.0
Value of loans with future funding commitments expected to fund	1,400.0
Commitments | Infrastructure Lending Segment
Property, Plant and Equipment [Line Items]
Value of loans with future funding commitments	167.3
Revolvers and Letters of Credit | Infrastructure Lending Segment
Property, Plant and Equipment [Line Items]
Value of loans with future funding commitments	121.1
Outstanding	8.5
Delayed Draw Term Loans | Infrastructure Lending Segment
Property, Plant and Equipment [Line Items]
Value of loans with future funding commitments	$ 46.2