Schedule II-Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Allowance for doubtful receivables
Movement in Valuation and Qualifying Accounts
Balance at beginning of period	$ 7,898	$ 7,555	$ 8,406
Charged to profit and loss	4,674	1,336	1,627
Deductions from reserves	(2,203)	(993)	(2,478)
Balance at close of period	10,369	7,898	7,555
Allowance for deferred income tax asset valuation
Movement in Valuation and Qualifying Accounts
Balance at beginning of period	120,979	123,522	208,130
Charged to profit and loss	(13,212)	(2,543)	(84,608)
Balance at close of period	$ 107,767	$ 120,979	$ 123,522