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Warranty Reserves (Tables)
 6 Months Ended
Jul. 05, 2020
Product Warranties Disclosures [Abstract]  
Warranty Reserve Activity
A summary of warranty reserve activity is as follows:
 Three Months EndedSix Months Ended
 July 5,
2020		June 30,
2019		July 5,
2020		June 30,
2019
 (In thousands)
Balance at beginning of period$9,041  $8,159  $8,812  $8,393  
Provision charged to income3,473  2,934  6,185  5,702  
Payments(2,889) (3,283) (6,155) (6,537) 
Adjustments to previously provided warranties, net655  149  1,707  419  
Foreign currency translation and acquisitions190  26  (79) 8  
Balance at end of period$10,470  $7,985  $10,470  $7,985