STOCK COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restricted Stock
Shares [Roll Forward]
Nonvested, Beginning Balance (shares)	25,522		23,933		25,522
Granted (shares)			0		0
Vested (shares)			(849)		(2,438)
Forfeited or cancelled (shares)			0		0
Nonvested, Ending Balance (shares)			23,084		23,084
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, Beginning Balance (in dollars per share)	$ 38.01		$ 38.12		$ 38.01
Granted (in dollars per share)			0.00		0.00
Vested (in dollars per share)			44.84		39.28
Forfeitures or cancelled (in dollars per share)			0.00		0.00
Nonvested, Ending Balance (in dollars per share)			$ 37.88		$ 37.88
Total unrecognized compensation cost related to nonvested shares granted under the Plan			$ 838		$ 838
Weighted-average period for recognition					3 years 3 months 4 days
Total fair value of shares vested					$ 112	$ 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			$ 100	$ 75	$ 184	$ 154