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Product Warranty Reserves (Tables)
 3 Months Ended
Mar. 26, 2016
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
The following is a summary of the Company's product warranty activity.
 
Three Months Ended
 
March 26,
2016
 
March 28,
2015
Product warranty reserve at beginning of period
$
2,159

 
$
2,214

Warranty liabilities accrued
1,352

 
1,808

Warranty liabilities settled
(1,760
)
 
(1,988
)
Changes for pre-existing warranty liabilities
417

 
511

Product warranty reserve at end of period
$
2,168

 
$
2,545