Fair Value Measurements (Financial Assets and Liabilities, Classified by Level) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent consideration included in accrued and other current liabilities	$ 6,629	$ 8,042
Contingent consideration included in other non-current liabilities	0	4,217
Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	28,213	28,431
Fair Value, Measurements, Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	661,884	762,055
Investments for deferred compensation plan	28,200	28,400
Contingent consideration included in accrued and other current liabilities	0	0
Contingent consideration included in other non-current liabilities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Currency derivative assets included in other current assets	0	0
Currency derivative liabilities included in accrued and other current liabilities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	28,213	28,431
Fair Value, Measurements, Recurring \| Level 1 \| Deferred Compensation Plan \| Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	41	108
Fair Value, Measurements, Recurring \| Level 1 \| Deferred Compensation Plan \| Common stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	988	2,329
Fair Value, Measurements, Recurring \| Level 1 \| Deferred Compensation Plan \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	9,606	6,765
Fair Value, Measurements, Recurring \| Level 1 \| Deferred Compensation Plan \| Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	17,578	19,229
Fair Value, Measurements, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Contingent consideration included in accrued and other current liabilities	0	0
Contingent consideration included in other non-current liabilities	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Currency derivative assets included in other current assets	107	1,517
Currency derivative liabilities included in accrued and other current liabilities	2,187	165
Fair Value, Measurements, Recurring \| Level 2 \| Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Deferred Compensation Plan \| Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Deferred Compensation Plan \| Common stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Deferred Compensation Plan \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Deferred Compensation Plan \| Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Contingent consideration included in accrued and other current liabilities	6,629	8,042
Contingent consideration included in other non-current liabilities	0	3,971
Fair Value, Measurements, Recurring \| Level 3 \| Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Currency derivative assets included in other current assets	0	0
Currency derivative liabilities included in accrued and other current liabilities	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Deferred Compensation Plan \| Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Deferred Compensation Plan \| Common stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Deferred Compensation Plan \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Deferred Compensation Plan \| Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments for deferred compensation plan	$ 0	$ 0

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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