Provision for Taxes (Reconciliation of total amounts of unrecognized tax benefits roll forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits beginning balance	$ 48,851	$ 31,069
Additions based on tax positions related to the current year	7,226	8,257
Reductions for tax positions of prior years	(443)	0
Additions for tax provisions of prior years	2,473	9,525
Unrecognized tax benefits ending balance	$ 58,107	$ 48,851