Provision for Taxes (Reconciliation of Total Amounts of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits beginning balance	$ 58,107	$ 48,851
Additions based on tax positions related to the current year	10,202	7,226
Reductions for tax positions of prior years	(27,536)	(443)
Additions for tax provisions of prior years	41,203	2,473
Unrecognized tax benefits ending balance	$ 81,976	$ 58,107