STOCK COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Stock
Shares [Roll Forward]
Nonvested, beginning of period (in shares)	29,694	25,522
Granted (in shares)		14,425
Vested (in shares)		(10,253)
Forfeited or cancelled (in shares)		0
Nonvested, end of period (in shares)		29,694	25,522
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning of period (in dollars per share)	$ 40.81	$ 38.01
Granted (in dollars per share)		42.77
Vested (in dollars per share)		36.58
Forfeitures or cancelled (in dollars per share)		0.00
Nonvested, end of period (in dollars per share)		$ 40.81	$ 38.01
Total unrecognized compensation cost related to nonvested shares granted under the Plan		$ 1,167
Weighted-average period for recognition		3 years 6 months 15 days
Total fair value of shares vested		$ 432	$ 382	$ 193
President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Service period		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
Expense related to stock compensation recognized		$ 357	$ 301	$ 269
Subsequent Event | 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