GOODWILL AND IDENTIFIED INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Finite-lived Intangible Assets [Roll Forward]
Additions	$ 131,120	$ 0
Disposals		0
Indefinite-lived Intangible Assets [Roll Forward]
Currency Translation	34,336	(72,716)
Accumulated Amortization Rollforward [Roll Forward]
Amortization	(26,386)	(18,739)	$ (8,500)
Intangible Assets (Excluding Goodwill) Rollforward [Roll Forward]
December 25, 2016	471,591	578,813
Currency Translation	40,838	(88,483)
December 31, 2017	617,163	471,591	578,813
Trade names
Finite-lived Intangible Assets [Roll Forward]
December 25, 2016	41,369	41,617
Additions	38,200	0
Currency Translation	117	(248)
December 31, 2017	79,686	41,369	41,617
Accumulated Amortization Rollforward [Roll Forward]
December 25, 2016	(37,128)	(35,216)
Amortization	(3,808)	(1,905)
Currency Translation	48	(7)
December 31, 2017	(40,888)	(37,128)	(35,216)
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
December 25, 2016	151,147	168,021
Additions	92,900	0
Currency Translation	7,905	(16,874)
Disposals		0
December 31, 2017	251,952	151,147	168,021
Accumulated Amortization Rollforward [Roll Forward]
December 25, 2016	(53,055)	(37,583)
Amortization	(22,571)	(16,834)
Currency Translation	(1,568)	1,362
Disposals		0
December 31, 2017	(77,194)	(53,055)	(37,583)
Non-compete agreement
Finite-lived Intangible Assets [Roll Forward]
December 25, 2016	300	300
Additions	20	0
Currency Translation	0	0
December 31, 2017	320	300	300
Accumulated Amortization Rollforward [Roll Forward]
December 25, 2016	(300)	(300)
Amortization	(7)	0
Currency Translation	0
December 31, 2017	(307)	(300)	(300)
Trade names
Indefinite-lived Intangible Assets [Roll Forward]
December 25, 2016	369,258	441,974
December 31, 2017	$ 403,594	$ 369,258	$ 441,974