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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2021
Commitments and Contingencies [Abstract]  
Changes in Product Warranties
The following table provides the changes in our product warranties (in thousands):

 
 
Three Months Ended
March 31,
 
 
 
2021
   
2020
 
 
           
Balance, beginning of period
 
$
17,663
   
$
17,175
 
Liabilities accrued for current year sales
   
20,177
     
22,067
 
Settlements of warranty claims
   
(20,892
)
   
(22,010
)
Balance, end of period
 
$
16,948
   
$
17,232