FAIR VALUE DISCLOSURES - Non Financial Assets and Non Financial Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Non-Financial Assets and Non-Financial Liabilities
Carrying value of foreclosed assets prior to measurement	$ 227	$ 630
Charge-offs / Write-downs	(51)	(65)
Fair value of foreclosed assets	176	565
Previously reported
Non-Financial Assets and Non-Financial Liabilities
Carrying value of foreclosed assets prior to measurement	881	2,018
Charge-offs / Write-downs		(47)
Fair value of foreclosed assets	$ 881	$ 1,971