FAIR VALUE DISCLOSURES (Reconciliation of All Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)) (Details) - State and Municipal Securities [Member] - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Balance of recurring Level 3 assets at January 1	$ 880	$ 670
Changes in fair value of securities included in other comprehensive income	(4)	(3)
Principal payments	(45)	(45)
Balance of recurring Level 3 assets at March 31	$ 831	$ 622

FAIR VALUE DISCLOSURES (Reconciliation of All Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)) (Details) - State and Municipal Securities [Member] - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2018

Mar. 31, 2017

Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]

Balance of recurring Level 3 assets at January 1

$ 880

$ 670

Changes in fair value of securities included in other comprehensive income

(4)

(3)

Principal payments

(45)

Balance of recurring Level 3 assets at March 31

$ 831

$ 622