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Related Party Transactions (Narratives) (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Property Management Fee [Abstract] |  |
Property Management Fee Revenue | $ 19.5 | $ 17.0
Related party costs and expenses: |  |
Payments For Purchase Of Other Assets 1 | 59.6 | 46.7
Sac Holdings [Member] |  |
Related party costs and expenses: |  |
Revenue generated by the dealer agreement from related parties | 19.1 | 15.4
Commission expenses, generated from dealer agreement with related parties | 3.8 | 1.2
Cash flow, related party | $ 18.2 | 14.3
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Minimum [Member] |  |
Property Management Fee [Abstract] |  |
Management fee rate | 4.00% |
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Maximum [Member] |  |
Property Management Fee [Abstract] |  |
Management fee rate | 10.00% |
Sac Holdings, Four Sac, Five Sac, Galaxy, and Private Mini [Member] |  |
Related party costs and expenses: |  |
Cash flow, related party | $ 289.6 | $ 214.5

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