Other Contingent Liabilities And Other Matters (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Other Contingent Liabilities and Other Matters [Line Items]
Other contingent liabilities	$ 1,000	$ 1,000
Net provision for losses (recoveries) on advances to suppliers		(2,810)	$ (5,562)
Stock repurchase program authorized amount	100,000	100,000
Stock repurchase program remaining authorized repurchase amount	100,000	100,000
Accounts Receivable, Sale	42,000
Gain (Loss) on Sale of Accounts Receivable	400
Advances to suppliers [Member]
Other Contingent Liabilities and Other Matters [Line Items]
Advances to suppliers current and non-current	135,000	135,000	151,000	$ 189,000
Valuation allowances	13,000	13,000	11,000	18,000
Net provision for losses (recoveries) on advances to suppliers		(2,800)	(5,600)
Recoverable value added tax credits [Member]
Other Contingent Liabilities and Other Matters [Line Items]
Aggregate balance of recoverable value added tax credits	65,000	65,000	63,000	64,000
Valuation allowances	$ 22,000	$ 22,000	$ 22,000	$ 22,000