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Stock-Based Compensation - Equity Incentive Plan (Narrative) (Details) $ in Thousands, shares in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2024 USD ($) shares	Sep. 30, 2024 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 114,457	$ 114,457
Equity Incentive Plan Options | Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares) | shares	0.1	0.6
Fair value of options granted	$ 9,500	$ 92,000
Performance period		3 years

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