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Related Party Transactions (Narratives) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Sac Holdings [Member] |  |  |
Related party notes receivable: |  |  |
Notes receivable outstanding | $ 48,098 | $ 49,322 |
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] |  |  |
Related party costs and expenses: |  |  |
Revenue, excluding dealer agreement commissions and expenses | 28,000 |  |
Expenses, related parties | 2,700 |  |
Cash flow, related party | 26,100 |  |
Revenue, generated by the dealer agreement from related parties | 265,100 |  |
Commission expenses, generated from dealer agreement with related parties | 57,100 |  |
Various Subsidiaries of Amerco [Member] | Sac Holdings [Member] |  |  |
Related party notes receivable: |  |  |
Cash interest payments | 4,500 | 4,600 | $ 5,700
Notes receivable outstanding | 48,100 |  |
Largest aggregate balance in reporting period | $ 49,300 |  |
Earliest maturity year | 2017 |  |
Amerco, Uhaul Intl [Member] | Private Mini [Member] |  |  |
Related party notes receivable: |  |  |
Cash interest payments | $ 1,500 |  |
One time cash interest proceeds |  | 56,800 |
Amerco, Uhaul Intl [Member] | Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] |  |  |
Management fees revenue: |  |  |
Management fees received exclusive of reimbursed expenses | $ 27,800 | $ 27,100 | $ 25,800
Amerco, Uhaul Intl [Member] | Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Minimum [Member] |  |  |
Management fees revenue: |  |  |
Management fee rate | 4.00% | 4.00% | 4.00%
Amerco, Uhaul Intl [Member] | Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Maximum [Member] |  |  |
Management fees revenue: |  |  |
Management fee rate | 10.00% | 10.00% | 10.00%

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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 We provide the largest aggregate amount of related party notes receivable that occurred during this reporting period. This can be compared to the related party notes receivable balance at the end of this period. + References No definition available. + Details
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- Definition The US-GAAP taxonomy only contains a single date for related party transactions. RelatedPartyTransaction Date. We disclose our earliest and latest maturities on the various outstanding notes only by the year. + References No definition available. + Details
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