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Related Party Transactions (Narratives) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Property Management Fee [Abstract] |  |
Property Management Fee Revenue | $ 9.3 | $ 8.2
Related party costs and expenses: |  |
Revenue generated by the dealer agreement from related parties | 138.9 | 103.5
Payments For Purchase Of Other Assets 1 | 28.8 | 22.7
Sac Holdings [Member] |  |
Related party notes receivable: |  |
Interest paid (received) in cash on derivative contracts | 9.5 | 0.7
Private Mini [Member] |  |
Related party costs and expenses: |  |
Commission expenses, generated from dealer agreement with related parties | $ 0.6 | 0.6
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 | $ 8.6 | $ 6.6

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