Product Warranties (Schedule Of Product Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance as of beginning of the period	$ 48,754	$ 46,659
Provision for warranty liability made during the period	44,630	49,570
Settlements made during the period	(50,632)	(50,539)
Balance at end of period	$ 42,752	$ 45,690