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Commitments and Contingencies (Tables)
 6 Months Ended
Sep. 30, 2020
Commitments and Contingencies [Abstract]  
Changes in Warranty Return Accrual
The following summarizes the changes in the warranty return accrual:

 
  
Three Months Ended
September 30,
    
Six Months Ended
September 30,
  
 
  
2020
    
2019
    
2020
    
2019
  
Balance at beginning of period
  
$
22,192,000
    
$
15,818,000
    
$
18,300,000
    
$
19,475,000
  
Charged to expense
    
30,872,000
      
32,531,000
      
53,961,000
      
55,716,000
  
Amounts processed
    
(30,565,000
)
    
(31,774,000
)
    
(49,762,000
)
    
(58,616,000
)
Balance at end of period
  
$
22,499,000
    
$
16,575,000
    
$
22,499,000
    
$
16,575,000