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Derivatives - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Derivatives - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Derivatives
Termination value of derivatives in net liability position	$ 0.0		$ 0.0
Interest rate lock commitments notional value
Derivatives
Notional amount	22.9		22.9		$ 16.7
Forward contract notional value
Derivatives
Notional amount	31.5		31.5		34.0
Not designated as hedging instrument \| Interest rate swap
Derivatives
Notional amount	957.5		957.5		777.7
Derivative fee income from non-designated hedges	0.5	$ 0.0	1.1	$ 0.2
Cash flow hedges \| Designated as hedging instrument
Derivatives
Notional amount	50.0		50.0
Reclassification of accumulated other comprehensive loss during the next 12 months			0.3
Fair value hedges \| Designated as hedging instrument \| Interest rate swap
Derivatives
Notional amount	$ 405.2		$ 405.2		$ 365.2