FAIR VALUE (FAIR VALUE ASSETS AND LIABILITIES) (DETAILS) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Liabilities [Abstract]
Contingent consideration	$ (399)	$ (1,808)	$ (13,450)
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Liabilities [Abstract]
Deferred compensation plan liability	(13,219)	(10,841)
Derivative instruments, net	(24,786)	(53,446)
Total liabilities	(38,005)	(64,287)
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities [Abstract]
Contingent consideration	(399)	(1,808)
Total liabilities	$ (399)	$ (1,808)