Commitments and Contingencies (Details) - USD ($)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2019
Change in warranty return accrual [Roll Forward]
Balance at beginning of year	$ 21,093,000	$ 18,300,000
Charged to expense	27,261,000	23,089,000
Amounts processed	(28,344,000)	(19,197,000)
Balance at end of year	$ 20,010,000	$ 22,192,000
Contingencies [Abstract]
Estimated additional import duties			$ 17,000,000