Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Allowance for credit losses
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	$ 1,350	$ 1,583	$ 1,991
Additions Resulting in Charges to Operations	48	1,450	826
Charges to Other Accounts	(733)	(1,202)	(464)
Deductions Due to Write-Offs	(249)	(481)	(770)
Balance at End of Fiscal Year	416	1,350	1,583
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	5,641	835	3,108
Additions Resulting in Charges to Operations	5,765	4,806	905
Charges to Other Accounts	0	0	0
Deductions Due to Write-Offs	0	0	(3,178)
Balance at End of Fiscal Year	$ 11,406	$ 5,641	$ 835