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EMPLOYEE BENEFIT PLANS, Restricted Stock Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Additional General Disclosures [Abstract]
Share-based compensation expense	$ 369	$ 308	$ 278
Restricted Stock [Member]
Deferred Compensation Arrangements [Abstract]
Number of shares authorized (in shares)	150,000
Number of shares available for grant (in shares)	129,211
Unvested Shares [Roll Forward]
Outstanding, beginning of year (in shares)	9,764
Granted (in shares)	6,371
Forfeited (in shares)	(716)
Vested (in shares)	(4,542)
Outstanding, end of year (in shares)	10,877	9,764
Weighted Average Market Price [Roll Forward]
Outstanding, beginning of year (in dollars per share)	$ 58.21
Granted (in dollars per share)	60.02	$ 62.74	$ 53.84
Forfeited (in dollars per share)	60.49
Vested (in dollars per share)	55.86
Outstanding, end of year (in dollars per share)	$ 60.11	$ 58.21
Additional General Disclosures [Abstract]
Share-based compensation expense	$ 299	$ 256	$ 214
Compensation cost related to nonvested awards that has not yet recognized	$ 654
Period over which compensation cost is expected to be recognized	3 years

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