COMPREHENSIVE INCOME - Reconciliation of changes in components of other comprehensive loss (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other comprehensive loss
Net unrealized losses on securities available-for-sale	$ (202)	$ (318)	$ (399)
Reclassification of net realized gains in net income	415	298	648
Unrealized losses on securities available-for-sale	(520)	(496)	(983)
Other comprehensive (loss) income, net of tax	(415)	(298)	(648)
Statements of Comprehensive Income (Loss)
Other comprehensive loss
Net unrealized losses on securities available-for-sale	(202)	(318)	(399)
Reclassification of net realized gains in net income	(318)	(178)	(584)
Unrealized losses on securities available-for-sale	(520)	(496)	(983)
Income tax benefit	105	198	335
Unrealized losses on securities available-for-sale, net of tax	(415)	(298)	(648)
Other comprehensive (loss) income, net of tax	$ (415)	$ (298)	$ (648)

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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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