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Product Warranties (Tables)
 3 Months Ended
Apr. 01, 2017
Product Warranties Disclosures [Abstract]  
Activity Associated with Warranty Obligations
Activity associated with warranty obligations was as follows during the periods noted:
 
 
Three Months Ended
(In thousands)
 
April 1, 2017
 
April 2, 2016
Balance at beginning of period
 
$
15,250

 
$
16,227

Accruals for warranties issued during period
 
5,540

 
5,480

Adjustments related to pre-existing warranties
 
(116
)
 
281

Settlements made during the period
 
(5,548
)
 
(5,831
)
Balance at end of period
 
$
15,126

 
$
16,157