EQUITY (Narrative) (Details) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) item $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares
EQUITY [Abstract]
Common stock, par value | $ / shares	$ 1	$ 1	$ 1
Number of votes per common stock | item	1
Preferred stock, shares authorized	5,000,000
Preferred stock issued	0
Number of shares held in treasury	0	0	0
Shares purchased and retired	510,283	1,426,659	1,426,659
Cost of shares purchased and retired | $	$ 60,303	$ 161,463	$ 161,463
Shares remaining under the current authorization repurchase program	9,489,717