STOCK COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Restricted Stock
Shares [Roll Forward]
Nonvested, Beginning Balance (shares)	29,694		29,694
Granted (shares)			439
Vested (shares)			(697)
Forfeited or cancelled (shares)			0
Nonvested, Ending Balance (shares)			29,436
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, Beginning Balance (in dollars per share)	$ 40.81		$ 40.81
Granted (in dollars per share)			45.66
Vested (in dollars per share)			34.58
Forfeitures or cancelled (in dollars per share)			0.00
Nonvested, Ending Balance (in dollars per share)			$ 41.03
Total unrecognized compensation cost related to nonvested shares granted under the Plan			$ 1,100
Weighted-average period for recognition			3 years 4 months 28 days
Total fair value of shares vested			$ 32	$ 73
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)	8,465	6,015
Expenses related to stock based compensation recognized			$ 93	$ 85