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Related Party Notes Receivable and Management Fees [Text] (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Mar. 31, 2012
SAC Holdings |  |  |
Related party notes receivable: |  |  |
Notes receivable outstanding | $ 73,053,000 |  | $ 195,426,000
Various Subsidiaries of Amerco | SAC Holdings |  |  |
Related party notes receivable: |  |  |
Cash interest payments | 7,200,000 | 4,300,000 |
Earliest maturity year | 2019 | 2019 |
Latest maturity year | 2024 | 2024 |
Repayments of SAC Holdings notes and interest receivables | 127,300,000 |  |
Amerco and U-Haul Int'l | Private Mini |  |  |
Related party notes receivable: |  |  |
Cash interest payments | 1,400,000 | 1,400,000 |
Notes receivable outstanding | 66,200,000 |  | 66,300,000
Amerco | SAC Holdings, Mercury, Four SAC, Five SAC, Galaxy and Private Mini |  |  |
Management fees revenue: |  |  |
Management fees received exclusive of reimbursed expenses | $ 9,400,000 | $ 8,600,000 |
Management fee rate, lowest | 4.00% | 4.00% |
Management fee rate, highest | 10.00% | 10.00% |

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