INVESTMENT SECURITIES - EQUITY SECURITIES (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Equity securities
Amortized Cost	$ 2,500		$ 2,500
Gross Unrealized Gains	662		410
Gross Unrealized Losses	(67)		(104)
Fair Value	3,095		2,806
Gains (Losses) Recognized on Equity securities, Unrealized	289	$ (182)
Gains (Losses) Recognized on Equity securities, Total	289	(182)
Freddie Mac preferred stock
Equity securities
Gross Unrealized Gains	662		410
Fair Value	662		410
Gains (Losses) Recognized on Equity securities, Unrealized	252	(145)
Gains (Losses) Recognized on Equity securities, Total	252	(145)
Community Reinvestment Act mutual fund
Equity securities
Amortized Cost	2,500		2,500
Gross Unrealized Losses	(67)		(104)
Fair Value	2,433		$ 2,396
Gains (Losses) Recognized on Equity securities, Unrealized	37	(37)
Gains (Losses) Recognized on Equity securities, Total	$ 37	$ (37)

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84241550&loc=SL75117546-209714

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Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84241550&loc=SL75117546-209714

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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