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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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