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Warranty Obligations (Tables)
 6 Months Ended
Jun. 29, 2014
Guarantees [Abstract]  
Changes in Warranty Obligations
The changes in the warranty obligations were as follows (in thousands):
Balance as of December 31, 2013
$
3,016

Provisions for warranties issued during the period
1,416

Fulfillment of warranty obligations
(1,043
)
Foreign exchange rate changes
(28
)
Balance as of June 29, 2014
$
3,361