GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Net income	$ 68,590us-gaap_NetIncomeLoss	$ 65,886us-gaap_NetIncomeLoss	$ 25,897us-gaap_NetIncomeLoss	$ 34,297us-gaap_NetIncomeLoss	$ 42,748us-gaap_NetIncomeLoss	$ 56,571us-gaap_NetIncomeLoss	$ 19,673us-gaap_NetIncomeLoss	$ 41,415us-gaap_NetIncomeLoss	$ 194,670us-gaap_NetIncomeLoss	$ 160,407us-gaap_NetIncomeLoss	$ 161,150us-gaap_NetIncomeLoss
Post-retirement benefit plans									(5,110)	6,609	(981)
Foreign currency translation adjustments									(7,845)	(5,486)	1,058
Comprehensive income									181,715us-gaap_ComprehensiveIncomeNetOfTax	161,530us-gaap_ComprehensiveIncomeNetOfTax	161,227us-gaap_ComprehensiveIncomeNetOfTax
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									194,670	160,407	161,150
Post-retirement benefit plans									(5,110)	6,609	(981)
Foreign currency translation adjustments									(7,845)	(5,486)	1,058
Comprehensive income									181,715	161,530	161,227
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									199,130	156,080	163,142
Post-retirement benefit plans									(5,110)	6,609	(981)
Foreign currency translation adjustments									(7,845)	(5,486)	1,058
Comprehensive income									186,175	157,203	163,219
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									(11,339)	(59,387)	(41,723)
Post-retirement benefit plans									(4,963)	6,237	(1,163)
Foreign currency translation adjustments									(251)	354	(114)
Comprehensive income									(16,553)	(52,796)	(43,000)
Non-Guarantors Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									6,163	(2,708)	4,911
Post-retirement benefit plans									0	0	0
Foreign currency translation adjustments									(7,845)	(5,486)	1,058
Comprehensive income									(1,682)	(8,194)	5,969
Consolidating Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									(193,954)	(93,985)	(126,330)
Post-retirement benefit plans									10,073	(12,846)	2,144
Foreign currency translation adjustments									15,941	10,618	(2,002)
Comprehensive income									$ (167,940)	$ (96,213)	$ (126,188)