Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 1,583	$ 1,991	$ 2,066
Additions Resulting in Charges to Operations	1,450	826	695
Charges to Other Accounts	(1,202)	(464)	(346)
Deductions Due to Write-Offs	(481)	(770)	(424)
Balance at End of Year	1,350	1,583	1,991
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	835	3,108	3,374
Additions Resulting in Charges to Operations	4,806	905	0
Charges to Other Accounts	0	0	0
Deductions Due to Write-Offs	0	(3,178)	(266)
Balance at End of Year	$ 5,641	$ 835	$ 3,108