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Warranty (Tables)
 3 Months Ended
Mar. 31, 2018
Product Warranties Disclosures [Abstract]  
Reconciliation of Changes in Warranty Liability
A reconciliation of the changes in our warranty liability was as follows (in thousands):
 
Three Months Ended
 
March 31,
2018
 
April 1,
2017
Balance at beginning of period
$
3,662

 
$
2,972

Accruals
1,025

 
1,127

Settlements
(1,848
)
 
(1,517
)
Balance at end of period
$
2,839

 
$
2,582