Balance Sheet Information-Warranty (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Product Warranty Accrual, beginning of period	$ 43,624	$ 38,787
Additions and adjustments to cost of revenue	7,431	4,878
Usage	(3,490)	(4,693)
Product Warranty Accrual, end of period	$ 47,565	$ 38,972