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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2019
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,
 
 
 
2019
   
2018
   
2019
   
2018
 
 
                       
Balance, beginning of period
 
$
22,694
   
$
20,560
   
$
19,636
   
$
20,929
 
Liabilities accrued for current year sales
   
24,283
     
23,136
     
50,679
     
44,378
 
Settlements of warranty claims
   
(24,891
)
   
(21,991
)
   
(48,229
)
   
(43,602
)
Balance, end of period
 
$
22,086
   
$
21,705
   
$
22,086
   
$
21,705