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DERIVATIVES - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Contract
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Derivative [Line Items]            
Unrealized gain       $ 6,400,000    
Net interest income (expense) $ 45,525,000   $ 35,211,000 128,040,000 $ 100,849,000  
Swap valuation allowance     1,350,000 673,000 1,350,000  
Accrued interest receivable 17,816,000     17,816,000   $ 21,589,000
Not Designated as Hedging Instrument [Member] | Commercial Real Estate Loan [Member]            
Derivative [Line Items]            
Swap valuation provision placed on non-accrual status           2,100,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]            
Derivative [Line Items]            
Notional amount 290,000,000.0     290,000,000.0   230,000,000.0
Unrealized after-tax gain of accumulated other comprehensive income (loss) 167,000          
Unrealized gain       4,083,000   (3,479,000)
Net interest income (expense) (11,000)   $ 1,000,000.0 1,700,000 $ 3,300,000  
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]            
Derivative [Line Items]            
Notional amount $ 290,000,000     $ 290,000,000    
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]            
Derivative [Line Items]            
Notional amount           230,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Forward Contracts [Member]            
Derivative [Line Items]            
Notional amount   $ 100,000,000.0        
Derivative, maturity year   2023        
Derivative, maturity term   5 years        
Weighted-average fixed pay rate 2.25%     2.25%    
Number of forward contract | Contract   4        
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member]            
Derivative [Line Items]            
Notional amount $ 627,502,000     $ 627,502,000   702,210,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]            
Derivative [Line Items]            
Accrued interest receivable 2,000,000.0     2,000,000.0   2,000,000.0
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]            
Derivative [Line Items]            
Accrued interest payable $ 4,800,000     $ 4,800,000   $ 4,800,000