COMMON STOCK (Details) - USD ($)	1 Months Ended	6 Months Ended
	Mar. 31, 2009	Jun. 30, 2019	Dec. 31, 2008
Class of Treasury Stock [Abstract]
Common stock authorized by the Board of Directors (in shares)	1,200,000		2,250,000
Total purchased shares (in shares)	859,499	0
Additional estimated shares (in shares)		122,379
Closing price (in dollars per share)		$ 122.57
Maximum [Member]
Class of Treasury Stock [Abstract]
Percentage of repurchase of common stock	10.00%
Bank credit agreement to permit share repurchases of common stock	$ 15,000,000