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Commitments and Contingencies (Tables)
 9 Months Ended
Dec. 31, 2019
Commitments and Contingencies [Abstract]  
Changes in Warranty Return Accrual
The following summarizes the changes in the warranty return accrual:

  
Three Months Ended
December 31,
  
Nine Months Ended
December 31,
 
  
2019
  
2018
  
2019
  
2018
 
Balance at beginning of period
 
$
16,575,000
  
$
16,410,000
  
$
19,475,000
  
$
16,646,000
 
Charged to expense/additions
  
26,637,000
   
29,655,000
   
82,353,000
   
84,408,000
 
Amounts processed
  
(28,226,000
)
  
(26,913,000
)
  
(86,842,000
)
  
(81,902,000
)
Balance at end of period
 
$
14,986,000
  
$
19,152,000
  
$
14,986,000
  
$
19,152,000