EQUITY AWARDS - Summary of Restricted Stock Awards and Units Activity (Details) - Restricted Stock Awards And Units [Member] - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Number of Shares
Outstanding at beginning of year (in shares)	35,300	31,459
Effect of 10% stock dividend (in shares)	3,530
Granted (in shares)	3,500	0
Vested (in shares)	(7,850)	(13,380)
Forfeited (in shares)	0	0
Balance (in shares)	34,480	18,079
Weighted-Average Grant Date Fair Value
Outstanding at beginning of year	$ 29.72	$ 30.29
Granted	33.09	0
Vested	27.26	30.30
Forfeited	0	0
Balance	$ 27.41	$ 30.28