Provision for Taxes (Reconciliation of total amounts of unrecognized tax benefits roll forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits beginning balance	$ 31,069	$ 29,632
Revaluation based on change in after tax benefit	0	0
Additions based on tax positions related to the current year	8,257	1,479
Reductions for tax positions of prior years	0	(42)
Additions for tax provisions of prior years	9,525	0
Unrecognized tax benefits ending balance	$ 48,851	$ 31,069