Commitments And Contingencies Schedule of Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance as of beginning of the period	$ 50,393	$ 40,967	$ 56,706	$ 44,888
Provision for warranty liability made during the period	27,939	22,625	62,748	53,862
Settlements made during the period	(24,506)	(15,664)	(65,628)	(50,822)
Balance at end of period	$ 53,826	$ 47,928	$ 53,826	$ 47,928