Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Derivative [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	$ 0.3	$ (4.4)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(1.0)	(3.5)
Derivative Notional Amount Terminated	300.0		$ 550.0
Gain (Loss) on Hedging Activity			$ 0.2
Derivative Instruments and Hedges, Noncurrent	300.0
Not Designated as Hedging Instrument
Derivative [Line Items]
Amount of net fee income recognized in other noninterest income	0.0	0.0
Amount of net gains recognized in mortgage banking revenues	0.0	0.0
Interest Rate Swap
Derivative [Line Items]
Derivative Instruments and Hedges, Assets	850.0
Interest Rate Swap | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	(1.0)	$ 17.4
Interest Rate Collars
Derivative [Line Items]
Derivative Instruments and Hedges, Assets	$ 300.0