STOCK AWARD PLANS, Director Plan Stock Option Activity (Details) - Director Plan [Member] - $ / shares	9 Months Ended
	Sep. 30, 2019
Stock Award Plan Information [Abstract]
Shares available for future grants (in shares)	462,342
Stock Options [Member]
Stock Award Plan Information [Abstract]
Term of grant	10 years
Outstanding Non-Qualified or Nonincentive Stock Options [Roll Forward]
Outstanding at Period Start (in shares)	131,104
Granted (in shares)	2,652
Exercised (in shares)	(6,000)
Outstanding at Period End (in shares)	127,756
Weighted Average Exercise Price [Abstract]
Outstanding at Period Start (in dollars per share)	$ 70.14
Granted (in dollars per share)	84.90
Exercised (in dollars per share)	29.60
Outstanding at Period End (in dollars per share)	$ 72.35
Restricted Stock [Member]
Stock Award Plan Information [Abstract]
Vesting period	6 months