Fair Value Measurements - Schedule of Financial Assets and Liabilities, Classified by Level (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Mar. 31, 2026
Deferred compensation
Assets:
Investments for deferred compensation plan	$ 36,317	$ 28,871
Level 1
Assets:
Investments for deferred compensation plan	33,200	30,500
Level 1 \| Recurring
Assets:
Cash equivalents	656,191	863,120
Investments for deferred compensation plan	33,187	30,495
Currency derivative assets	0	0
Liabilities:
Currency derivative liabilities	0	0
Level 1 \| Deferred compensation \| Cash \| Recurring
Assets:
Investments for deferred compensation plan	63	60
Level 1 \| Deferred compensation \| Common stock \| Recurring
Assets:
Investments for deferred compensation plan	1,205	902
Level 1 \| Deferred compensation \| Money market funds \| Recurring
Assets:
Investments for deferred compensation plan	8,009	4,553
Level 1 \| Deferred compensation \| Mutual funds \| Recurring
Assets:
Investments for deferred compensation plan	23,910	24,980
Level 2 \| Recurring
Assets:
Cash equivalents	0	0
Investments for deferred compensation plan	0	0
Currency derivative assets	5,450	5,486
Liabilities:
Currency derivative liabilities	212	94
Level 2 \| Deferred compensation \| Cash \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 2 \| Deferred compensation \| Common stock \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 2 \| Deferred compensation \| Money market funds \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 2 \| Deferred compensation \| Mutual funds \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 3 \| Recurring
Assets:
Cash equivalents	0	0
Investments for deferred compensation plan	0	0
Currency derivative assets	0	0
Liabilities:
Currency derivative liabilities	0	0
Level 3 \| Deferred compensation \| Cash \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 3 \| Deferred compensation \| Common stock \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 3 \| Deferred compensation \| Money market funds \| Recurring
Assets:
Investments for deferred compensation plan	0	0
Level 3 \| Deferred compensation \| Mutual funds \| Recurring
Assets:
Investments for deferred compensation plan	$ 0	$ 0