Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 28, 2013	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Movement in Valuation and Qualifying Accounts
Balance at beginning of period			$ 10,369
Balance at close of period	$ 10,369			$ 10,369
Allowance for doubtful receivables
Movement in Valuation and Qualifying Accounts
Balance at beginning of period		$ 9,922	10,369	7,898
Charged to profit and loss	4,674	12,420	1,780
Deductions from reserves		1,334	2,227	2,203
Balance at close of period	10,369	21,008	9,922	10,369
Allowance for deferred income tax asset valuation
Movement in Valuation and Qualifying Accounts
Balance at beginning of period		104,487	107,767	120,979
Charged to profit and loss		(13,650)	(3,280)	(13,212)
Deductions from reserves		0	0
Balance at close of period	$ 107,767	$ 90,837	$ 104,487	$ 107,767