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Related Party Notes Receivable and Management Fees [Text] (Details) (USD $) | 12 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Sac Holdings [Member] |  |  |
Related party notes receivable: |  |  |
Notes receivable outstanding | $ 71,464,000 | $ 72,397,000 |
Operating Segments [Member] | Moving and Storage Operating Segment | AMERCO [Member] | Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] |  |  |
Management fees revenue: |  |  |
Management fees received exclusive of reimbursed expenses | 25,800,000 | 23,700,000 | 22,500,000
Management fee rate, lowest | 4.00% | 4.00% | 4.00%
Management fee rate, highest | 10.00% | 10.00% | 10.00%
Operating Segments [Member] | Moving and Storage Operating Segment | Amerco, Uhaul Intl [Member] | Private Mini [Member] |  |  |
Related party notes receivable: |  |  |
Cash interest payments | 5,400,000 | 5,400,000 | 5,400,000
Notes receivable outstanding | 65,500,000 |  |
Largest aggregate balance in reporting period | 65,900,000 |  |
Operating Segments [Member] | Moving and Storage Operating Segment | Various Subsidiaries of Amerco [Member] | Sac Holdings [Member] |  |  |
Related party notes receivable: |  |  |
Cash interest payments | 17,200,000 | 12,600,000 | 17,800,000
Notes receivable outstanding | 71,500,000 |  |
Largest aggregate balance in reporting period | $ 72,400,000 |  |
Earliest maturity year | 2017 | 2017 | 2017
Latest maturity year | 2019 | 2019 | 2019

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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 rate for related party transactions: RelatedPartyTransactionRate. We disclose a range of rates for management fees. + References No definition available. + Details
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- 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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- 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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- Definition The US-GAAP taxonomy only contains a single rate for related party transactions: RelatedPartyTransactionRate. We disclose a range of rates for management fees. + References No definition available. + Details
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- Definition Base revenue, as contractually stipulated, for operating and managing another entity's business during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.3) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Related Parties -URI http://asc.fasb.org/extlink&oid=16382449 + Details
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- Definition Interest received on loans and other debt instruments during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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