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Organization (Details) $ / shares in Units, $ in Thousands		1 Months Ended	6 Months Ended
	Sep. 18, 2020 USD ($) vote $ / shares shares	Sep. 30, 2021 shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($)
Subsidiary, Sale of Stock [Line Items]
Shares redeemed (in shares)	100
Offering costs | $			$ 1,079	$ 5,899
Purchase of non-controlling interests | $			$ 3,046	$ 131,294
Conversion of Class B Units to Class B Common Stock
Subsidiary, Sale of Stock [Line Items]
Conversion of stock (in shares)	1
Blocker Entities | Owners
Subsidiary, Sale of Stock [Line Items]
Ownership percentage	100.00%
Partnership
Subsidiary, Sale of Stock [Line Items]
Economic interest		50.10%	50.10%
Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, number of votes | vote	1
Class A Common Stock | Greenspring
Subsidiary, Sale of Stock [Line Items]
Stock issued for acquisition (in shares)		12,686,756
Class A Common Stock | Partnership
Subsidiary, Sale of Stock [Line Items]
Purchase of non-controlling interests | $	$ 209,800
Number of partnership units acquired (in shares)	12,500,000
Class A Common Stock | Blocker Entities | Owners
Subsidiary, Sale of Stock [Line Items]
Number of shares owned after all transactions (in shares)	9,112,500
Class B Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, number of votes | vote	5
Class B Common Stock | Partnership
Subsidiary, Sale of Stock [Line Items]
Purchase of non-controlling interests | $	$ 128,000
Number of partnership units acquired (in shares)	7,625,000
Class C units
Subsidiary, Sale of Stock [Line Items]
Conversion basis (in shares)			1
Class C units | Greenspring
Subsidiary, Sale of Stock [Line Items]
Stock issued for acquisition (in shares)		3,071,519
General Partner | Partnership
Subsidiary, Sale of Stock [Line Items]
Membership ownership percentage	100.00%
IPO
Subsidiary, Sale of Stock [Line Items]
Net proceeds from stock offering | $	$ 337,800
Offering costs | $	24,500
IPO | Partnership
Subsidiary, Sale of Stock [Line Items]
Offering costs | $	$ 9,700
IPO | Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Shares sold in offering (in shares)	20,125,000
Offering price per share (in dollars per share) | $ / shares	$ 18.00

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