Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Deferred Tax Valuation Allowance [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 74,631	$ 66,819	$ 57,852
Charged to costs and expenses		7,812	8,967
Deductions	5,116
Balance at end of year	69,515	74,631	66,819
Allowance For Expected Credit Losses [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	1,220
Charged to costs and expenses	117
Deductions	1,019
Balance at end of year	318	1,220
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 1,220	1,634	788
Charged to costs and expenses		508	1,434
Deductions		(922)	(588)
Balance at end of year		$ 1,220	$ 1,634