Derivatives and Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivative Assets (included in other assets on the consolidated balance sheets):
Derivative Asset, Notional Amount	$ 1,399.9	$ 1,420.5
Derivative Asset, Estimated Fair Value	35.3	44.9
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):
Derivative Liabilities, Notional Amount	2,086.4	2,107.0
Derivative Liabilities, Estimated Fair Value	107.3	133.8
Not Designated as Hedging Instrument | Interest rate swap contracts
Derivative Assets (included in other assets on the consolidated balance sheets):
Derivative Asset, Notional Amount	1,390.7	1,415.4
Derivative Asset, Estimated Fair Value	35.2	44.9
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):
Derivative Liabilities, Notional Amount	1,390.7	1,415.4
Derivative Liabilities, Estimated Fair Value	105.7	130.0
Not Designated as Hedging Instrument | Interest rate lock commitments
Derivative Assets (included in other assets on the consolidated balance sheets):
Derivative Asset, Notional Amount	9.2	2.7
Derivative Asset, Estimated Fair Value	0.1	0.0
Not Designated as Hedging Instrument | Forward loan sales contracts
Derivative Assets (included in other assets on the consolidated balance sheets):
Derivative Asset, Notional Amount	0.0	2.4
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):
Derivative Liabilities, Notional Amount	6.7	0.0
Derivative Liabilities, Estimated Fair Value	0.0	0.0
Designated as Hedging Instrument [Member] | Interest rate swap contracts
Derivative Assets (included in other assets on the consolidated balance sheets):
Derivative Asset, Notional Amount	0.0	0.0
Derivative Asset, Estimated Fair Value	0.0	0.0
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):
Derivative Liabilities, Notional Amount	300.0	300.0
Derivative Liabilities, Estimated Fair Value	$ 1.0	$ 2.8