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v2.4.1.9

Net Investment and Interest Income (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Net Investment Income [Line Items] |  |  |
Investment income | $ 75,858 us-gaap_NetInvestmentIncome | $ 68,801 us-gaap_NetInvestmentIncome | $ 70,521 us-gaap_NetInvestmentIncome
Less: investment expenses | (1,962)us-gaap_InvestmentIncomeInvestmentExpense | (1,629)us-gaap_InvestmentIncomeInvestmentExpense | (1,374)us-gaap_InvestmentIncomeInvestmentExpense
Investment income, related party | 10,832 uhal_InvestmentIncomeRelatedParty | 12,419 uhal_InvestmentIncomeRelatedParty | 13,756 uhal_InvestmentIncomeRelatedParty
Net investment and interest income | 84,728 us-gaap_InvestmentIncomeInterestAndDividend | 79,591 us-gaap_InvestmentIncomeInterestAndDividend | 82,903 us-gaap_InvestmentIncomeInterestAndDividend
Fixed Maturities [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Investment income | 58,716 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_FixedMaturitiesMember | 53,634 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_FixedMaturitiesMember | 50,696 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_FixedMaturitiesMember
Real Estate [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Investment income | 2,669 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_RealEstateMember | 1,118 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_RealEstateMember | 380 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_RealEstateMember
Insurance policy loans [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Investment income | 1,072 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_PolicyLoansMember | 1,159 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_PolicyLoansMember | 1,126 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_PolicyLoansMember
Mortgage loans [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Investment income | 10,677 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_MortgageLoansOnRealEstateMember | 9,450 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_MortgageLoansOnRealEstateMember | 17,952 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_MortgageLoansOnRealEstateMember
Short-term, amounts held by ceding reinsurers, net and other investments [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Investment income | $ 2,724 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_ShortTermInvestmentsMember | $ 3,440 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_ShortTermInvestmentsMember | $ 367 us-gaap_NetInvestmentIncome / us-gaap_InvestmentTypeAxis = us-gaap_ShortTermInvestmentsMember

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- Definition Income derived from investments in related party. + References No definition available. + Details
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. + 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 210.5-03.7(a),(b)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of expenses related to the generation of investment income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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