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Product Warranty Costs (Tables)
 9 Months Ended
Oct. 01, 2016
Standard Product Warranty Disclosure [Abstract]  
Reconciliation of product warranty reserve
Changes in the warranty reserve are as follows (in thousands):
 
Quarters Ended
 
Nine Months Ended
 
October 1, 2016
 
October 3, 2015
 
October 1, 2016
 
October 3, 2015
Balance at the beginning of the period
$
85,397

 
$
88,901

 
$
85,112

 
$
89,940

Provision for warranties issued and changes in estimates for pre-existing warranties
1,556

 
1,513

 
4,413

 
4,220

Claims paid
(1,739
)
 
(1,689
)
 
(4,950
)
 
(4,752
)
Foreign currency translation
(158
)
 
(449
)
 
481

 
(1,132
)
Balance at the end of the period
$
85,056

 
$
88,276

 
$
85,056

 
$
88,276