SECURITIES (Schedule of financing receivable credit quality indicators) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	$ 88,890	$ 91,324
Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	88,890	$ 91,324
Standard & Poor's, AAA Rating | Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	0
Standard & Poor's, AA, AA+, AA- | Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	64,385
Standard & Poor's, A+, A, A- Rating | Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	18,353
Standard & Poor's, BBB Rating | Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	4,208
Standard & Poor's, Not Rated | Obligations of states and political subdivisions
Financing Receivable, Recorded Investment [Line Items]
Held to maturity debt securities	$ 1,944