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Taxes (Details 5) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Taxes      
Tax at statutory rate (as a percent) 35.00% 35.00% 35.00%
State, net of federal tax benefit (as a percent) 0.90% 1.00% 1.20%
Foreign rate differential (as a percent) (12.50%) (10.00%) (12.00%)
U.S. tax on foreign income (as a percent) 5.90% 3.10% 6.70%
Income tax contingencies (as a percent) 0.00% (1.70%) 0.70%
Valuation allowances 0.90% 0.00% 0.00%
Other (as a percent) 0.70% 0.60% 0.30%
Provision for income taxes (as a percent) 30.90% 28.00% 31.90%
Undistributed earnings of certain foreign subsidiaries $ 653,100,000    
Unrecognized tax benefits that would favorably impact the effective tax rate in future periods if recognized 9,600,000 10,700,000 12,700,000
Unrecognized tax benefits excluding interest and penalties 200,000    
Accrued income tax-related interest 1,200,000 2,200,000  
Penalties accrued 400,000 300,000  
Accrued interest (benefit) expense (1,000,000) (1,000,000) 1,200,000
Reconciliation of the total amounts of unrecognized tax benefits      
Balance at beginning of year 15,549,000 17,974,000 10,945,000
Gross increases tax positions 3,310,000 1,245,000 5,963,000
Gross decreases tax positions (4,384,000) (2,580,000) 0
Gross increases - current year 3,575,000 2,486,000 1,192,000
Settlements (3,456,000) (3,582,000) (119,000)
Lapse in statute of limitations (297,000) 0 0
Increase due to currency 17,000 6,000 (7,000)
Balance at end of year $ 14,314,000 $ 15,549,000 $ 17,974,000