SHAREHOLDERS' EQUITY - Options Outstanding and Exercisable (Details) - Employee stock option - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Outstanding at beginning of year (in shares)	509,212	463,304	661,024
Granted (in shares)	80,976	79,025	110,112
Exercised (in shares)	(25,967)	(29,917)	(196,639)
Cancelled or expired (in shares)	(22,564)	(3,200)	(111,193)
Outstanding at end of year (in shares)	541,657	509,212	463,304
Options exercisable at year end (in shares)	333,796	297,889	223,158
Weighted Avg. Exercise Price
Outstanding at beginning of year (in dollars per share)	$ 25.65	$ 24.28	$ 19.78
Granted (in dollars per share)	28.99	32.65	38.02
Exercised (in dollars per share)	20.25	22.87	15.37
Cancelled or expired (in dollars per share)	33.01	26.61	26.87
Outstanding at end of year (in dollars per share)	26.10	25.65	24.28
Weighted average fair value per option granted during the year (in dollars per share)	$ 11.30	$ 13.07	$ 18.50