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Derivative Financial Instruments - Summary of Location and Fair Value of Derivative Instruments (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Instrument
Dec. 31, 2024
USD ($)
Instrument
Derivatives not designated as hedging instruments, fair value    
Derivative Asset, Fair Value $ 37,634 $ 65,762
Derivative Liability, Fair Value $ 38,726 $ 57,068
Interest Rate Swap Agreements on Loans with Commercial Loan Customers | Not Designated as Hedging Instrument    
Derivatives not designated as hedging instruments, fair value    
Derivative Asset, Number of Instruments | Instrument 49 20
Derivative Asset, Notional Amount $ 580,438 $ 232,488
Derivative Asset, Weighted Average Maturity 3 years 10 months 13 days 4 years 6 months 18 days
Derivative Asset, Fair Value $ 10,157 $ 2,015
Derivative Liability, Number of Instruments Held | Instrument 65 86
Derivative Liability, Notional Amount $ 558,756 $ 789,877
Derivative Liability, Weighted Average Maturity 5 years 14 days 5 years 5 months 8 days
Derivative Liability, Fair Value $ 35,534 $ 56,559
Interest Rate Swap Agreements on Loans with Third-party Counter Parties | Not Designated as Hedging Instrument    
Derivatives not designated as hedging instruments, fair value    
Derivative Asset, Number of Instruments | Instrument 114 106
Derivative Asset, Notional Amount $ 1,139,194 $ 1,022,365
Derivative Asset, Weighted Average Maturity 4 years 5 months 8 days 5 years 2 months 26 days
Derivative Asset, Fair Value $ 25,377 $ 54,544
Interest Rate Swap Related to AFS Securities | Designated as Hedging Instrument    
Derivatives not designated as hedging instruments, fair value    
Derivative Asset, Number of Instruments | Instrument 11 11
Derivative Asset, Notional Amount $ 12,500 $ 12,500
Derivative Asset, Weighted Average Maturity 6 years 6 months 10 days 7 years 3 months 10 days
Derivative Asset, Fair Value $ 757 $ 1,014
Interest Rate Swap Related to Wholesale Funding | Designated as Hedging Instrument    
Derivatives not designated as hedging instruments, fair value    
Derivative Asset, Number of Instruments | Instrument 4 36
Derivative Asset, Notional Amount $ 48,400 $ 384,655
Derivative Asset, Weighted Average Maturity 2 years 4 months 13 days 3 years 11 months 12 days
Derivative Asset, Fair Value $ 1,343 $ 8,189
Derivative Liability, Number of Instruments Held | Instrument 44 10
Derivative Liability, Notional Amount $ 448,755 $ 100,000
Derivative Liability, Weighted Average Maturity 3 years 3 months 21 days 1 year 6 months 18 days
Derivative Liability, Fair Value $ 3,192 $ 509