Balance Sheet Components (Schedule Of Accounts Receivable And Related Allowances) (Details) - USD ($) $ in Thousands	Sep. 27, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 291,345	$ 296,239
Total allowances	(17,172)	(20,550)
Accounts receivable, net	274,173	275,689
Allowance for Doubtful Accounts, Current [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowances	(1,255)	(1,255)
Allowance for Sales Returns [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowances	(14,394)	(17,489)
Allowance For Price Protection [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowances	$ (1,523)	$ (1,806)