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INVESTMENT SECURITIES - Contractual Maturities of Investment Securities (Details) $ in Thousands	Sep. 30, 2018 USD ($) security	Dec. 31, 2017 USD ($) security
INVESTMENT SECURITIES
Number of securities continuous unrealized loss position more than twelve months | security	160	114
Available for Sale Amortized Cost
Due within one year	$ 1,935
Due over one to five years	2,467
Due over five to ten years	20,141
Due over ten years	62,643
Amortized Cost	87,186	$ 90,268
Available for Sale Fair Value
Due within one year	1,937
Due over one to five years	2,452
Due over five to ten years	19,378
Due over ten years	60,262
Fair Value	$ 84,029	$ 89,349
Available for Sale, Yield
Within one year	3.62%
Over one to five years	2.30%
Over five to ten years	2.13%
Over ten years	2.86%

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