v3.26.1
Derivative Instruments and Hedge Activities - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Jun. 30, 2023
May 30, 2023
Mar. 31, 2023
Derivative [Line Items]                
Derivative notional amount $ 1,635,312   $ 1,635,312   $ 1,703,495      
Other Assets 22,623   22,623   27,530      
Interest recorded 3,273 $ 1,396 5,931 $ 3,231        
Net unrealized gain 8,100   8,100          
Amortized cost basis of the closed portfolios of available-for-sale securities used in the hedging relationship 1,743,352   1,743,352   1,516,376      
Cumulative basis adjustments (1,500)   (1,500)   98      
Fair value of derivatives net liability position 11,400   11,400          
Offsetting derivative positions 1,198   1,198   4,856      
Interest Rate Swap                
Derivative [Line Items]                
Interest recorded 2,400 3,500 5,300 7,200        
Other Interest Rate Derivatives                
Derivative [Line Items]                
Derivative notional amount 1,013,279   1,013,279          
Other Assets $ 11,312   $ 11,312          
Weighted average pay rates 5.42%   5.42%          
Derivative Weighted Average Receive Rate 6.05%   6.05%          
Derivative maturity date, start year     2026-07          
Derivative maturity date, end year     2036-04          
Derivative instruments transaction fees $ 565 $ 1,100 $ 835 $ 1,600        
Other Derivatives                
Derivative [Line Items]                
Derivative notional amount 8,900   8,900   9,000      
Notional amount of nonderivative instruments     13,100   6,500      
Cash Flow Hedging                
Derivative [Line Items]                
Derivative notional amount 500,000   500,000          
Other Assets $ 9,819   $ 9,819          
Weighted average pay rates 5.97%   5.97%          
Derivative Weighted Average Receive Rate 1.15%   1.15%          
Cash Flow Hedging | Other Interest Rate Derivatives                
Derivative [Line Items]                
Derivative notional amount $ 300,000   $ 300,000          
Cash Flow Hedging | Fixed Interest Rate Swap                
Derivative [Line Items]                
Derivative notional amount $ 200,000   $ 200,000          
Weighted average pay rates 3.63%   3.63%          
Derivative Weighted Average Receive Rate 6.40%   6.40%          
Fair Value Hedges                
Derivative [Line Items]                
Derivative notional amount $ 100,000   $ 100,000          
Other Assets 1,480   1,480          
Amortized cost basis of the closed portfolios of available-for-sale securities used in the hedging relationship 513,900   513,900   552,500      
Fair Value Hedges | Fixed Interest Rate Swap                
Derivative [Line Items]                
Derivative notional amount 100,000   100,000          
Designated as Hedging Instrument | Cash Flow Hedging                
Derivative [Line Items]                
Terminated swaps           $ 50,000 $ 50,000  
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap                
Derivative [Line Items]                
Derivative notional amount 500,000   500,000   650,000      
Other Assets 9,819   9,819   14,053      
Terminated swaps               $ 100,000
Remaining balance in accumulated other comprehensive income 4,200   4,200          
Remaining unamortized balance 1,600   1,600   2,000      
Designated as Hedging Instrument | Cash Flow Hedging | Fixed Interest Rate Swap                
Derivative [Line Items]                
Derivative notional amount $ 200,000   $ 200,000          
Investment, Type [Extensible Enumeration] us-gaap:AdjustableRateLoansMember   us-gaap:AdjustableRateLoansMember          
Designated as Hedging Instrument | Cash Flow Hedging | Fixed Interest Rate Swap | Deposits And Other Borrowings                
Derivative [Line Items]                
Derivative notional amount $ 300,000   $ 300,000          
Designated as Hedging Instrument | Fair Value Hedges | Interest Rate Swap                
Derivative [Line Items]                
Derivative notional amount 100,000   100,000   100,000      
Other Assets 1,480   1,480   0      
Derivatives Not Designated As Hedging Instruments | Other Interest Rate Derivatives                
Derivative [Line Items]                
Derivative notional amount 1,013,279   1,013,279   938,004      
Other Assets $ 11,312   $ 11,312   $ 13,470