Annual report pursuant to Section 13 and 15(d)

INVESTMENT SECURITIES - (Narrative) (Details)

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INVESTMENT SECURITIES - (Narrative) (Details)
 12 Months Ended
Dec. 31, 2022
USD ($)
Securities
Dec. 31, 2021
USD ($)
Securities
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Investments Securities [Abstract]        
Securities pledged to secure public deposits $ 656,100,000 $ 463,800,000    
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities and Held-to-maturity investments in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total | Securities 928 401    
Available-for-sale Securities and Held-To-Maturity, Continuous Unrealized Loss Position, Accumulated Loss $ 90,000,000.0 $ 10,200,000    
Provision For Loan Losses Expensed $ 7,065,000 (2,842,000) $ 9,035,000  
Number of holdings securities in an amount greater than 10% of shareowner's equity | Securities 0      
Amortized Cost $ 455,232,000 660,732,000    
Fair Value 413,294,000 654,611,000    
Unrealized Losses 41,946,000 7,460,000    
Allowance for Credit Losses 24,736,000 21,606,000 $ 23,816,000 $ 13,905,000
Equity Securities 10,000 861,000    
Securities held nonaccrual status $ 0      
Municipal Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities and Held-to-maturity investments in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total | Securities 127      
Allowance for Credit Losses $ 13,000      
U.S. Treasury Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities and Held-to-maturity investments in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total | Securities 87      
Amortized Cost $ 23,977,000 190,409,000    
Fair Value 22,050,000 187,868,000    
Unrealized Losses 1,928,000 2,606,000    
U.S. Government Agency [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized Cost 198,888,000 238,490,000    
Fair Value 186,052,000 237,578,000    
Unrealized Losses 12,863,000 2,141,000    
Allowance for Credit Losses 0      
Estimated write off of loans and leases receivable $ 0      
U.S. government agency and mortgage-backed securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities and Held-to-maturity investments in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total | Securities 714      
Available-for-sale Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Number of available for sale securities transferred | Securities 33      
Amortized Cost $ 168,400,000      
Fair Value 159,000,000.0      
Unrealized Losses 7,900,000      
Corporate Debt Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized Cost 97,119,000 87,537,000    
Fair Value 88,236,000 86,222,000    
Unrealized Losses 8,874,000 $ 1,304,000    
Allowance for Credit Losses $ 28,000