v3.26.3
Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Other assets $ 417,943 $ 265,868
Other liabilities 447,021 246,159
Fair Value Hedging [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset Notional 700,000 700,000
Derivatives Not Designated as Hedging Instruments [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 31,674 161
Liability Derivatives 31,674 161
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets    
Derivatives, Fair Value [Line Items]    
Derivative Asset Notional 272,258 318,385
Asset Derivatives 31,674 161
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability Notional 272,258 318,385
Liability Derivatives 31,674 161
Designated as Hedging Instrument [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 23,862 0
Designated as Hedging Instrument [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities    
Derivatives, Fair Value [Line Items]    
Liability Derivatives 56 11,269
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets | Fair Value Hedging [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset Notional 700,000 0
Asset Derivatives 23,774 0
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets | Cash Flow Hedging [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset Notional 150,000 0
Asset Derivatives 88 0
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities | Fair Value Hedging [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liability Notional 0 700,000
Liability Derivatives 0 8,650
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities | Cash Flow Hedging [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liability Notional 150,000 300,000
Liability Derivatives $ 56 $ 2,619