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v3.3.1.900

Borrowings (Long-term Debt Borrowings) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Mar. 31, 2015
Debt instrument, maturities: |  |  |
Notes, loans and leases payable |  | $ 2,424,671 | $ 2,190,869
Real estate loan (amortizing term) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage (a) | [1] | 6.93% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year |  | 2023 |
Notes, loans and leases payable |  | $ 207,500 | 240,000
Senior Mortgages [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 2.27% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 5.50% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year range, start |  | 2016 |
Debt instrument, maturity year range, end |  | 2038 |
Notes, loans and leases payable |  | $ 949,163 | 717,512
Working capital loan (revolving credit) [Member] |  |  |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year |  | 2016 |
Fleet loans (amortizing term) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 1.95% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 4.76% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year range, start |  | 2016 |
Debt instrument, maturity year range, end |  | 2022 |
Notes, loans and leases payable |  | $ 198,350 | 202,784
Fleet loans (term) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 3.52% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 3.53% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year |  | 2016 |
Notes, loans and leases payable |  | $ 115,000 | 115,000
Fleet loans (securitization) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage (a) | [1] | 4.90% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year |  | 2017 |
Notes, loans and leases payable |  | $ 65,000 | 75,846
Fleet loans (revolving credit) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 1.24% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 2.08% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year range, start |  | 2017 |
Debt instrument, maturity year range, end |  | 2019 |
Notes, loans and leases payable |  | $ 222,000 | 190,000
Capital Leases (rental equipment) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 2.18% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 7.92% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year range, start |  | 2016 |
Debt instrument, maturity year range, end |  | 2022 |
Notes, loans and leases payable |  | $ 608,336 | 602,470
Other obligations [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage rate range, minimum | [1] | 3.00% |
Debt instrument, interest rate, stated percentage rate range, maximum | [1] | 8.00% |
Debt instrument, maturities: |  |  |
Debt instrument, maturity year range, start |  | 2016 |
Debt instrument, maturity year range, end |  | 2045 |
Notes, loans and leases payable |  | $ 59,322 | $ 47,257
[1] | Interest rate as of December 31, 2015, including the effect of applicable hedging instruments.

X
- Definition The latest maturity year for these debt instruments. + References No definition available. + Details
Name: | uhal_MaturityEndYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The earliest maturity year for these debt instruments. + References No definition available. + Details
Name: | uhal_MaturityStartYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The DebtInstrumentMaturityDate could have worked for this element, but it must include the format Month-Date-Year. Will use this US-GAAP Element in the next few schedules, when possible, where we break down the various items that make up the Borrowing's narrative. + References No definition available. + Details
Name: | uhal_MaturityYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LongTermDebtByMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_FleetLoanAmortizingTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_FleetLoanTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_FleetLoanSecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_FleetLoansRevolvingCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_CapitalLeasesForNewEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |