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Intangibles and Goodwill - Narrative (Details) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 USD ($) employee | Mar. 31, 2024 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Amortization of intangible assets |  |  | $ 42,400,000 | $ 43,500,000 | $ 24,500,000
Issuance of note related to sale of subsidiary |  |  | 8,436,000 | 0 | 0
Loss on sale of subsidiary |  |  | 812,000 | 0 | $ 0
Goodwill |  | $ 580,542,000 | 580,542,000 | 580,542,000 |
Goodwill, impairment loss |  | 0 | $ 0 | $ 0 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Greenspring Bank Office Solutions, LLC (GBOS) |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Percentage of equity interest sold | 100.00% |  |  |  |
Issuance of note related to sale of subsidiary | $ 8,400,000 |  |  |  |
Promissory note term | 6 years |  |  |  |
Number of terminated employees | employee | 42 |  |  |  |
Loss on sale of subsidiary |  | 800,000 |  |  |
Service agreement intangibles |  | $ 7,400,000 |  |  |

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