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Warranty Reserve (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Activity in warranty reserve:    
Balance at beginning of period $ 7,302 $ 7,578
Current period accrual 1,200 1,579
Warranty expenditures charged to accrual (1,267) (1,236)
Changes in accrual for pre-existing warranties 26 (34)
Balance at end of period $ 7,261 $ 7,887