STOCK PLANS (Summary of Stock Option Activity) (Details) - Stock options	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Stock Options, Shares
Balance at beginning of year | shares	1,179,761
Options granted (in shares) | shares	179,184
Options exercised | shares	(287,449)
Options canceled | shares	(630)
Options forfeited | shares	(2,642)
Balance at end of year | shares	1,068,224
Exercisable at end of year | shares	726,972
Stock Options, Weighted Average Exercise Price
Balance at beginning of year, weighted average exercise price (in dollars per share) | $ / shares	$ 77.31
Shares granted, weighted average exercise price (in dollars per share) | $ / shares	114.27
Shares exercised, weighted average exercise price (in dollars per share) | $ / shares	66.91
Shares canceled, weighted average exercise price (in dollars per share) | $ / shares	59.19
Shares forfeited, weighted average exercise price (in dollars per share) | $ / shares	89.51
Balance at end of year, weighted average exercise price (in dollars per share) | $ / shares	86.28
Exercisable at end of year, weighted average exercise price (in dollars per share) | $ / shares	$ 78.93