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Balance Sheet Information-Warranty (Details 6) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2016
Mar. 29, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance, beginning of period $ 42,311 $ 48,555
Additions and adjustments to cost of revenue 3,244 244
Usage (1,874) (4,167)
Balance, end of period $ 43,681 $ 44,632