Product Warranties (Schedule Of Product Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance as of beginning of the period	$ 46,659	$ 44,846
Provision for warranty liability made during the period	49,570	44,451
Settlements made during the period	(50,539)	(44,904)
Balance at end of period	$ 45,690	$ 44,393