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LOANS: (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group $ 7.1 $ 5.8
Loans serviced for others, not reported as assets 490.4 477.0
Escrow deposit 3.0 3.1
Fair value, based on valuations $ 2.4 $ 2.7
Assumptions used to estimate fair value, discount rate (percent) 12.50% 12.50%
Assumptions used to estimate fair value, weighted average life 8 years  
Director and Executive Officer    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Beginning Balance $ 89.5  
Advances 22.8  
Repayments 54.8  
Ending Balance $ 57.5 $ 89.5
Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assumptions used to estimate fair value, prepayment speed (percent) 403.00% 263.00%
Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assumptions used to estimate fair value, prepayment speed (percent) 239.00% 118.00%