Derivative Instruments and Fair Value Accounting Not Designated (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
TILC Warehouse Back to Back Swap Agreements - Open
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset	[1]	$ 7.8
Derivative Liability	[1]	0.0
TILC Warehouse Back to Back Swap Agreements - Open | Location, Statement of Income, Balance [Axis]: us-gaap:OtherOperatingIncomeExpenseNet
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	[1]	(2.5)	$ 2.9
TILC Back to Back Swap Agreements - Open
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset	[1]	0.0
Derivative Liability	[1]	7.8
TILC Back to Back Swap Agreements - Open | Location, Statement of Income, Balance [Axis]: us-gaap:OtherOperatingIncomeExpenseNet
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	[1]	$ 2.5	$ (2.9)

[1] Comprised of back-to-back interest rate caps entered into with the same counterparty in connection with our risk management objectives.