ALLOWANCE FOR LOAN LOSSES: (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Allowance for Credit Losses:
Impaired loans		$ 7,113
Allowance for Loan Losses Allocated		$ 48
Minimum outstanding balance of non-homogeneous loans to be individually evaluated as to credit risk	$ 100
Minimum
Allowance for Credit Losses:
Loan modification, reduction of stated interest rate	12 months
Loan modification, extension of maturity date	12 months
Maximum
Allowance for Credit Losses:
Loan modification, reduction of stated interest rate	5 years
Loan modification, extension of maturity date	10 years