STOCK COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Restricted Stock
Shares [Roll Forward]
Nonvested, Beginning Balance (shares)	25,522		25,522
Granted (shares)			0
Vested (shares)			(1,589)
Forfeited or cancelled (shares)			0
Nonvested, Ending Balance (shares)			23,933
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, Beginning Balance (in dollars per share)	$ 38.01		$ 38.01
Granted (in dollars per share)			0.00
Vested (in dollars per share)			30.75
Forfeitures or cancelled (in dollars per share)			0.00
Nonvested, Ending Balance (in dollars per share)			$ 38.12
Total unrecognized compensation cost related to nonvested shares granted under the Plan			$ 792
Weighted-average period for recognition			3 years 5 months 16 days
Total fair value of shares vested			$ 73	$ 16
President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Service period for comparable group used to determine share based payment awards			12 months
Directors and President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of treasury shares reissued to fund stock compensation (in shares)	6,015	7,880
Expenses related to stock based compensation recognized			$ 85	$ 79