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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies [Abstract]  
Rent Expense
Total rent expense for the three years ended December 31, 2020 was as follows (in thousands):

 
  
Total
    
Real Estate
    
Other
  
2020 (1)
  
$
11,669
    
$
8,290
    
$
3,379
  
2019 (1)
    
11,382
      
7,909
      
3,473
  
2018
    
12,605
      
9,272
      
3,333
  

(1)
Includes expenses of approximately $2.5 million and $2.4 million for the years ended December 31, 2020 and 2019, respectively, related to non-lease components such as maintenance, property taxes, etc., and operating lease expense for leases with an initial term of 12 months or less, which is not material.
Changes in Product Warranties
The following table provides the changes in our product warranties:

 
  
December 31,
  
 
  
2020
    
2019
  
 
  
(In thousands)
  
Balance, beginning of period
  
$
17,175
    
$
16,663
  
Liabilities accrued for current year sales
    
87,116
      
99,304
  
Settlements of warranty claims
    
(86,628
)
    
(98,792
)
Balance, end of period
  
$
17,663
    
$
17,175