EQUITY (Shares Purchased And Retired) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
EQUITY [Abstract]
Shares Purchased and Retired, Number		510	1,427	228
Shares Purchased and Retired, Total cost	[1]	$ 60,303	$ 161,463	$ 21,475
Shares Purchased and Retired, Average cost	[1]	$ 118.18	$ 113.18	$ 94.19
Commissions, price per share		$ 0.02	$ 0.02	$ 0.02

[1] 1Excludes commissions of $0.02 per share.