BUSINESS ACQUISITIONS (Fair Values and Useful Lives of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 06, 2017	Sep. 24, 2017
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Additions		$ 92,900
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Additions		38,200
Non-compete agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Additions		$ 20
GNP
Acquired Finite-Lived Intangible Assets [Line Items]
Additions	$ 131,120
Assets subject to amortization, weighted average useful life	15 years 2 months 12 days
GNP | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Additions	$ 92,900
Assets subject to amortization, weighted average useful life	13 years
GNP | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Additions	$ 38,200
Assets subject to amortization, weighted average useful life	20 years
GNP | Non-compete agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Additions	$ 20
Assets subject to amortization, weighted average useful life	3 years