Fair Value Measurements - Financial Assets and Liabilities, Classified by Level (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
Liabilities:
Contingent consideration included in accrued and other current liabilities	$ 1,700	$ 6,629
Recurring | Level 1
Assets:
Cash equivalents	712,451	661,884
Investments for deferred compensation plan	28,546	28,213
Currency derivative assets included in other current assets	0	0
Liabilities:
Contingent consideration included in accrued and other current liabilities	0	0
Currency derivative liabilities included in accrued and other current liabilities	0	0
Recurring | Level 1 | Cash
Assets:
Investments for deferred compensation plan	82	41
Recurring | Level 1 | Common stock
Assets:
Investments for deferred compensation plan	1,139	988
Recurring | Level 1 | Money market funds
Assets:
Investments for deferred compensation plan	10,544	9,606
Recurring | Level 1 | Mutual funds
Assets:
Investments for deferred compensation plan	16,781	17,578
Recurring | Level 2
Assets:
Cash equivalents	0	0
Investments for deferred compensation plan	0	0
Currency derivative assets included in other current assets	2,446	107
Liabilities:
Contingent consideration included in accrued and other current liabilities	0	0
Currency derivative liabilities included in accrued and other current liabilities	86	2,187
Recurring | Level 2 | Cash
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 2 | Common stock
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 2 | Money market funds
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 2 | Mutual funds
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 3
Assets:
Cash equivalents	0	0
Investments for deferred compensation plan	0	0
Currency derivative assets included in other current assets	0	0
Liabilities:
Contingent consideration included in accrued and other current liabilities	1,700	6,629
Currency derivative liabilities included in accrued and other current liabilities	0	0
Recurring | Level 3 | Cash
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 3 | Common stock
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 3 | Money market funds
Assets:
Investments for deferred compensation plan	0	0
Recurring | Level 3 | Mutual funds
Assets:
Investments for deferred compensation plan	$ 0	$ 0