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Fair Value Measurements (Narrative) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment	$ 18,400,000	$ 18,000,000.0
Impairment of equity method investments	0	0	$ 21,400,000
Initial cost basis of securities	8,800,000	10,100,000
Equity securities without readily determinable fair value, upward price adjustment, annual amount			6,900,000
Financial asset impairment charges	0	0
Impairment loss, before tax		9,600,000
Impairment of intangible assets	0	3,526,000	0
Non-financial asset impairment charges	0		$ 0
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments for deferred compensation plan	$ 29,006,000	$ 29,174,000

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