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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2021
Commitments and Contingencies [Abstract]  
Changes in Product Warranties
The following table provides the changes in our product warranties (in thousands):

 
  
Three Months Ended
June 30,
    
Six Months Ended
June 30,
  
 
  
2021
    
2020
    
2021
    
2020
  
Balance, beginning of period
  
$
16,948
    
$
17,232
    
$
17,663
    
$
17,175
  
Liabilities accrued for current year sales
    
25,162
      
22,795
      
45,339
      
44,862
  
Settlements of warranty claims
    
(23,897
)
    
(22,267
)
    
(44,789
)
    
(44,277
)
Balance, end of period
  
$
18,213
    
$
17,760
    
$
18,213
    
$
17,760