Balance Sheet Accounts (Schedule of Product Warranty Liability Activity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Dec. 31, 2012	Jan. 01, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance beginning of period	$ 2,971	$ 2,702	$ 2,871	$ 2,640
New warranties issued	1,942	1,589	3,504	3,237
Warranty expenditures	(1,942)	(1,640)	(3,404)	(3,226)
Balance end of period	$ 2,971	$ 2,651	$ 2,971	$ 2,651