Long-Term Debt and Capital Lease Obligations (Additional Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Dec. 29, 2012
Debt Instrument [Line Items]
Maximum borrowing capacity, Term Loan and Line of Credit	$ 970,000
US Term Loan	420,000
Maximum borrowing capacity, Line of Credit	550,000
Credit Facility Borrowing Capacity Available Increase	350,000
Gains (Losses) on Extinguishment of Debt	389
Debt Instrument, Basis Spread on Variable Rate	1.25%
Outstanding under letters of credit	4,855
Debt Instrument, Face Amount	350,000
Interest rate on debt (as a percent)	2.25%
Long-term Debt, Excluding Current Maturities	623,752	527,075
Capital lease obligations	741	72
Principal maturities of existing debt excluding unamortized debt discount
June 2014	15,987
June 2015	42,000
June 2016	42,000
June 2017	63,000
June 2018	476,752
Total	639,739
2.25% Senior convertible debentures
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	2.25%
Unamortized debt discount	0	6,726
Principal maturities of existing debt excluding unamortized debt discount
Total	$ 0	$ 349,995