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Product Warranties (Tables)
9 Months Ended
Sep. 29, 2018
Product Warranties Disclosures [Abstract]  
Summary of Activity in Warranty Accrual The Company determines warranty reserves needed by product line based on experience and current facts and circumstances. Activity in the warranty accrual is summarized as follows: 
Nine Months Ended Three Months Ended 
(In thousands)
September 29, 2018September 30, 2017September 29, 2018September 30, 2017
Balance at Beginning of Period
$5,136 $4,675 $5,180 $4,637 
Acquisitions
— 359 — — 
Warranties Issued
2,102 1,315 801 483 
Warranties Settled
(2,219)(1,832)(934)(608)
Reassessed Warranty Exposure
(77)101 (105)106 
Balance at End of Period
$4,942 $4,618 $4,942 $4,618