Annual report [Section 13 and 15(d), not S-K Item 405]

INVESTMENT SECURITIES (Narrative) (Details)

v3.25.4
INVESTMENT SECURITIES (Narrative) (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
Securities
Item
Dec. 31, 2024
USD ($)
Securities
Item
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Investment Securities [Abstract]        
Securities pledged to secure public deposits $ 461,300,000 $ 489,500,000    
Schedule of Available-for-sale Securities [Line Items]        
Number of holdings securities in an amount greater than 10% of shareowner's equity | Securities 0 0    
Amortized Cost $ 656,546,000 $ 429,033,000    
Fair Value 643,922,000 403,345,000    
Unrealized Losses 14,633,000 25,685,000    
Allowance for Credit Losses 31,001,000 29,251,000 $ 29,941,000 $ 25,068,000
AFS allowance for credit loss 42,000 67,000    
Equity Securities 2,069,000 2,399,000    
Securities held nonaccrual status 0      
Proceeds from the Sale of Securities $ 0 0 $ 30,420,000  
U.S. Government and Municipal Bonds [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Number of positions in AFS and HTM investments with unrealized losses | Item 625      
Debt Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities and Held-To-Maturity, Continuous Unrealized Loss Position, Accumulated Loss $ 23,700,000 $ 48,400,000    
Number of positions in AFS and HTM investments with unrealized losses | Item 736 856    
U.S. Treasury Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized Cost $ 331,495,000 $ 106,710,000    
Fair Value 333,264,000 105,801,000    
Unrealized Losses 171,000 934,000    
AFS allowance for credit loss $ 0 0    
Number of positions in AFS and HTM investments with unrealized losses | Item 29      
U.S. Government Agency [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized Cost $ 174,527,000 148,666,000    
Fair Value 172,114,000 143,127,000    
Unrealized Losses 2,484,000 5,578,000    
Allowance for Credit Losses 0      
AFS allowance for credit loss 0 0    
Estimated write off of loans and leases receivable 0      
Corporate Debt Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized Cost 45,810,000 55,970,000    
Fair Value 43,532,000 51,462,000    
Unrealized Losses 2,236,000 4,444,000    
AFS allowance for credit loss $ 42,000 $ 64,000    
Municipal and corporate bonds [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Number of positions in AFS and HTM investments with unrealized losses | Item 82