STOCKHOLDERS' EQUITY, Stock Options by Exercise Price Range (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Stock Options by Exercise Price [Abstract]
Number of shares outstanding (in shares) | shares	189,187
Weighted average life	8 years 7 months 13 days
Weighted average exercise price (in dollars per share)	$ 46.79
Number of shares exercisable (in shares) | shares	39,312
Weighted average option price (in dollars per share)	$ 32.73
Weighted average life	5 years 6 months 18 days
$15.75-15.85 [Member]
Stock Options by Exercise Price [Abstract]
Options exercise price, lower limit (in dollars per share)	$ 15.75
Options exercise price, upper limit (in dollars per share)	$ 15.85
Number of shares outstanding (in shares) | shares	21,000
Weighted average life	3 years 22 days
Weighted average exercise price (in dollars per share)	$ 15.82
Number of shares exercisable (in shares) | shares	21,000
Weighted average option price (in dollars per share)	$ 15.82
Weighted average life	3 years 22 days
$37.64-46.56 [Member]
Stock Options by Exercise Price [Abstract]
Options exercise price, lower limit (in dollars per share)	$ 37.64
Options exercise price, upper limit (in dollars per share)	$ 46.56
Number of shares outstanding (in shares) | shares	103,187
Weighted average life	9 years 5 months 26 days
Weighted average exercise price (in dollars per share)	$ 39.53
Number of shares exercisable (in shares) | shares	5,812
Weighted average option price (in dollars per share)	$ 40.56
Weighted average life	7 years 4 months 17 days
$54.93-66.30 [Member]
Stock Options by Exercise Price [Abstract]
Options exercise price, lower limit (in dollars per share)	$ 54.93
Options exercise price, upper limit (in dollars per share)	$ 66.30
Number of shares outstanding (in shares) | shares	65,000
Weighted average life	9 years 14 days
Weighted average exercise price (in dollars per share)	$ 58.66
Number of shares exercisable (in shares) | shares	12,500
Weighted average option price (in dollars per share)	$ 57.48
Weighted average life	8 years 10 months 17 days