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Related Party Transactions (Narratives) (Details) - Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Property Management Fee [Abstract] |  |  |
Management fees received exclusive of reimbursed expenses | $ 30.0 | $ 29.5 | $ 27.8
Related party costs and expenses: |  |  |
Revenue, excluding dealer agreement commissions and expenses | 24.0 |  |
Expenses, related parties | 2.7 |  |
Cash flow, related party | 21.3 |  |
Revenue, generated by the dealer agreement from related parties | 288.2 |  |
Commission expenses, generated from dealer agreement with related parties | $ 61.4 |  |
Minimum [Member] |  |  |
Property Management Fee [Abstract] |  |  |
Management fee rate | 4.00% | 4.00% | 4.00%
Maximum [Member] |  |  |
Property Management Fee [Abstract] |  |  |
Management fee rate | 10.00% | 10.00% | 10.00%

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- Definition Cash generated from agreements and notes with SAC Holdings, Four SAC, Five SAC, Galaxy and Private Mini, excluding Dealer Agreements. + References No definition available. + Details
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- Definition These agreements and notes with subsidiaries of SAC Holdings, 4 SAC, 5 SAC, Galaxy and Private Mini, Excluded Dealer Agreements commission expenses. + References No definition available. + Details
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- Definition Amount of revenue earned from products and services provided under the terms of contract, including, but not limited to, government contracts and construction contracts, classified as other. + References No definition available. + Details
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- Definition The amount of revenue received excluding any revenue generated from dealer commissions or expenses as part of the dealer contract between the Company and these related party entities. + References No definition available. + Details
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- Definition This provides just the cost and expense for SAC holdings. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The percentage charged for managing real estate properties. + References No definition available. + Details
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- Definition The amount of revenue derived from managing real estate properties. + References No definition available. + Details
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- References No definition available. + Details
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- Details
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- Details
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- Details
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