STOCK-BASED COMPENSATION PLANS - RSAs & Performance-Based RSUs (Details)	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Restricted Stock Awards (RSAs)
Number of shares
Beginning balance (in shares) | shares	51,561
Granted (in shares) | shares	50,981
Vested (in shares) | shares	(39,851)
Ending balance (in shares) | shares	62,691
Weighted average price at grant
Beginning balance (in dollars per share) | $ / shares	$ 50.92
Granted (in dollars per share) | $ / shares	53.92
Vested (in dollars per share) | $ / shares	50.72
Ending balance (in dollars per share) | $ / shares	$ 53.49
Restricted Stock Unit Award (RSUs)
Number of shares
Beginning balance (in shares) | shares	87,787
Granted (in shares) | shares	31,749
Performance criteria adjustment (in shares) | shares	12,257
Vested (in shares) | shares	(38,897)
Forfeited (in shares) | shares	(1,954)
Ending balance (in shares) | shares	90,942
Weighted average price at grant
Beginning balance (in dollars per share) | $ / shares	$ 46.62
Granted (in dollars per share) | $ / shares	53.96
Performance criteria adjustment (in dollars per share) | $ / shares	52.96
Vested (in dollars per share) | $ / shares	52.96
Forfeited (in dollars per share) | $ / shares	35.40
Ending balance (in dollars per share) | $ / shares	$ 52.71