v3.26.1
Derivative Financial Instruments - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Contract
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Contract
Designated as Hedging Instrument [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Total excluded components of earnings recognition $ 123 $ 130  
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Total notional amount 1,560,000   $ 1,630,000
Interest and fees on LHFS and LHFI reclassified as a reduction over twelve months 2,500    
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Total notional amount $ 1,560,000   $ 1,630,000
Derivatives not Designated as Hedging Instruments [Member] | Beneficiary [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Number of risk participation agreements | Contract 10   10
Aggregate notional amount of credit risk participation agreements $ 118,700   $ 113,700
Derivatives not Designated as Hedging Instruments [Member] | Guarantor [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Number of risk participation agreements | Contract 26   27
Aggregate notional amount of credit risk participation agreements $ 324,600   $ 267,900
Derivatives not Designated as Hedging Instruments [Member] | Mortgage Servicing Rights Hedge [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Total notional amount 338,000   345,500
Net (negative) positive ineffectiveness on MSR fair value (96) $ (581,000)  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Total notional amount 1,996,000   1,991,000
Termination value of derivatives 688   117
Collateral Posted 1,300   2,200
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet obligations 197,000   152,000
Valuation adjustment 1,600   (287)
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Lock Commitments [Member]      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet obligations 110,900   74,500
Valuation adjustment $ 887   $ 998