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DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Thousands	3 Months Ended		6 Months Ended
DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Thousands	Jul. 02, 2016 USD ($) item	Jul. 04, 2015 USD ($)	Jul. 02, 2016 USD ($) item	Jul. 04, 2015 USD ($)	Jan. 02, 2016 USD ($) item
Derivative Gain/Loss
Amount in AOCI related to hedge	$ (335,730)		$ (335,730)		$ (427,227)
Distribution expenses	21,190	$ 23,137	45,008	$ 48,140
Cost of goods sold	248,562	284,363	519,048	598,421
Net income	$ 64,134	2,258	$ 80,698	12,787
Diesel fuel
Derivative Gain/Loss
Hedge instrument period span			12 months
Number of hedge agreements \| item	0		0		0
Diesel fuel \| AOCI - Cash flow hedge
Derivative Gain/Loss
Amount in AOCI related to hedge	$ 0		$ 0
Natural gas
Derivative Gain/Loss
Hedge instrument period span			12 months
Number of hedge agreements \| item	0		0
Natural gas \| AOCI - Cash flow hedge
Derivative Gain/Loss
Amount in AOCI related to hedge	$ 0		$ 0
Commodity swap \| AOCI - Cash flow hedge
Derivative Gain/Loss
Gain recognized in OCI		786		990
Commodity swap \| AOCI - Cash flow hedge \| Reclassification adjustment
Derivative Gain/Loss
Net income		(898)		(1,441)
Commodity swap \| Diesel fuel \| Reclassification adjustment
Derivative Gain/Loss
Distribution expenses		(802)		(1,196)
Commodity swap \| Diesel fuel \| AOCI - Cash flow hedge
Derivative Gain/Loss
Gain recognized in OCI		722		780
Commodity swap \| Natural gas \| Reclassification adjustment
Derivative Gain/Loss
Cost of goods sold		(96)		(245)
Commodity swap \| Natural gas \| AOCI - Cash flow hedge
Derivative Gain/Loss
Gain recognized in OCI		$ 64		$ 210