EQUITY (Narrative) (Details) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2017 USD ($) item $ / shares shares	Jun. 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 issued	0
Number of shares held in treasury	0	0	0
Shares purchased and retired	510,283	636,659	1,427,000
Cost of shares purchased and retired | $	$ 60,303	$ 69,156	$ 161,463
Cash payment for stock repurchase | $	$ 60,303	$ 69,156
Shares remaining under the current authorization repurchase program	9,489,717