v3.26.1
Business Combinations, Asset Acquisitions, Transaction between Entities under Common Control, and Joint Venture Formation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Feb. 01, 2026
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Business Combination [Line Items]          
Goodwill   $ 263,424 $ 159,595 $ 159,595 $ 159,595
Loan balance   9,667,260   8,051,242  
Business Combination, Pro Forma Information, Pro Forma Revenue   132,582 121,250    
Business Combination, Pro Forma Information, Pro Forma Income (Loss) from Continuing Operations, after Tax   $ 56,100 $ 47,681    
Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Basic   $ 3.11 $ 2.63    
Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Diluted   $ 3.09 $ 2.61    
First Citizens Acquisition          
Business Combination [Line Items]          
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent $ 145,670        
Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current 742,952        
BusinessCombinationRecognizedIdentifiableAssetsAcquiredLoans, net of ACL 1,558,903        
BusinessCombinationRecognizedIdentifiableAssetsAcquiredLoans held for sale 4,902        
BusinessCombinationRecognizedIdentifiableAssetsAcquiredBank owned life insurance 33,887        
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment 30,529        
BusinessCombinationRecognizedIdentifiableAssetsAcquiredOther real estate owned 21,271        
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent 36,281        
Business Combination, Recognized Asset Acquired, Asset 2,612,420        
BusinessCombinationRecognizedIdentifiableLiabilitiesAssumedDeposits 2,221,111        
Business Combination, Recognized Liability Assumed, Long-Term Debt, Current 149,791        
Business Combination, Recognized Liability Assumed, Other Liability, Current 21,296        
Business Combination, Recognized Liability Assumed, Liability 2,392,198        
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) 220,222        
Goodwill 103,829        
Payments to Acquire Businesses, Gross $ 105        
Business Combination, Consideration Transferred, Equity Interest, Fair Value Method 321,891        
Business Combination, Consideration Transferred $ 324,051        
Business Combination, Price Per Share $ 162.94        
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares 1,988,131        
Business Combination, Acquisition-Related Cost, Expense   $ 15,500      
Financing Receivable, Allowance for Credit Loss $ (15,573)        
Non-credit discount on loans (17,300)        
Loan balance $ 1,591,776        
First Citizens Acquisition | Noncontrolling Interest          
Business Combination [Line Items]          
Business Combination, Consideration Transferred, Equity Interest, Fair Value Method 2,055        
Financial Asset Acquired with Credit Deterioration [Member]          
Business Combination [Line Items]          
Loan balance   54,400   2,500  
Financial Asset Acquired with Credit Deterioration [Member] | First Citizens Acquisition          
Business Combination [Line Items]          
BusinessCombinationRecognizedIdentifiableAssetsAcquiredLoans, net of ACL $ 59,228        
Financing Receivable, Allowance for Credit Loss (1,215) $ 903   $ 0  
Non-credit discount on loans (4,622)        
Loan balance 65,065        
Financial Asset Acquired and No Credit Deterioration | First Citizens Acquisition          
Business Combination [Line Items]          
BusinessCombinationRecognizedIdentifiableAssetsAcquiredLoans, net of ACL 1,499,675        
Financing Receivable, Allowance for Credit Loss (14,358)        
Non-credit discount on loans (12,678)        
Loan balance 1,526,711        
Core Deposits [Member] | First Citizens Acquisition          
Business Combination [Line Items]          
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill 34,440        
Other Intangible Assets | First Citizens Acquisition          
Business Combination [Line Items]          
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill $ 3,585