Commitments And Contingencies Schedule of Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance as of beginning of the period	$ 56,706	$ 44,888
Provision for warranty liability made during the period	16,216	16,255
Settlements made during the period	(23,014)	(18,266)
Balance at end of period	$ 49,908	$ 42,877