DERIVATIVE FINANCIAL INSTRUMENTS (Back-to-back loan swaps balance sheet category and fair values) (Details) - Back-to-Back Loan Swaps - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other assets
Derivative [Line Items]
Notional Amount	$ 233,665	$ 211,246
Fair Value, Other Assets	7,654	4,449
Other liabilities
Derivative [Line Items]
Notional Amount	233,665	211,246
Fair Value, Other Liabilities	$ (7,654)	$ (4,449)
Receive Rate | Other assets
Derivative [Line Items]
Weighted Average Rate	5.15%	5.10%
Receive Rate | Other liabilities
Derivative [Line Items]
Weighted Average Rate	5.05%	4.96%
Pay Rate | Other assets
Derivative [Line Items]
Weighted Average Rate	5.05%	4.96%
Pay Rate | Other liabilities
Derivative [Line Items]
Weighted Average Rate	5.15%	5.10%