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Derivatives and Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Derivative Assets (included in other assets on the consolidated balance sheets):    
Derivative Asset, Notional Amount $ 1,295.0 $ 1,420.5
Derivative Asset, Estimated Fair Value 26.9 44.9
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):    
Derivative Liabilities, Notional Amount 1,381.0 2,107.0
Derivative Liabilities, Estimated Fair Value 81.0 133.8
Not Designated as Hedging Instrument | Interest rate swap contracts    
Derivative Assets (included in other assets on the consolidated balance sheets):    
Derivative Asset, Notional Amount 1,294.6 1,415.4
Derivative Asset, Estimated Fair Value 26.9 44.9
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):    
Derivative Liabilities, Notional Amount 1,294.6 1,415.4
Derivative Liabilities, Estimated Fair Value 81.0 130.0
Not Designated as Hedging Instrument | Interest rate lock commitments    
Derivative Assets (included in other assets on the consolidated balance sheets):    
Derivative Asset, Notional Amount 0.1 2.7
Derivative Asset, Estimated Fair Value 0.0 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 0.3 2.4
Designated as Hedging Instrument [Member] | Interest rate swap contracts    
Derivative Liabilities (included in accounts payable and accrued expenses on the consolidated balance sheets):    
Derivative Liabilities, Notional Amount 0.0 300.0
Derivative Liabilities, Estimated Fair Value $ 0.0 $ 2.8