Credit Agreement (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended									3 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Apr. 24, 2013 Revolving credit facility	Dec. 28, 2013 Revolving credit facility	Dec. 28, 2013 Revolving credit facility Minimum	Dec. 28, 2013 Revolving credit facility Maximum	Dec. 28, 2013 Revolving credit facility Base rate	Dec. 28, 2013 Revolving credit facility Base rate Minimum	Dec. 28, 2013 Revolving credit facility Base rate Maximum	Dec. 28, 2013 Revolving credit facility Eurocurrency rate	Dec. 28, 2013 Revolving credit facility Eurocurrency rate Minimum	Dec. 28, 2013 Revolving credit facility Eurocurrency rate Maximum	Jun. 29, 2013 Multi currency portion	Apr. 24, 2013 Letters of credit
Senior Loan Agreement
Revolving credit facility, maximum capacity				$ 125,000,000											$ 15,000,000
Borrowings under revolving line of credit	17,320,000	0	0	15,000,000										2,300,000
Amount outstanding under revolving line of credit					0
Amounts outstanding under letters of credit	400,000				400,000
Variable rate basis								base rate			eurocurrency rate
Interest margin (as a percent)									0.50%	1.50%		1.50%	2.50%
Commitment fee payable on the unused portion of the credit facility (as a percent)						0.25%	0.375%
Percentage of stock of domestic subsidiaries pledged as collateral for borrowings					100.00%
Percentage of stock of foreign subsidiaries pledged as collateral for borrowings					65.00%
Value of stock in net assets pledged as collateral for borrowings					$ 6,500,000
Ratio of consolidated interest expense to consolidated EBITDA					2.5
Ratio of consolidated debt to consolidated EBITDA					3.0