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Condensed Financial Information of AMERCO, Statements of Operations (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Revenues: |  |  |
Net interest income from subsidiaries | $ 2,835,252 | $ 2,558,587 | $ 2,512,027
Expenses: |  |  |
Operating expenses | 1,288,481 | 1,170,568 | 1,093,190
Total expenses | 2,205,038 | 2,059,404 | 2,096,020
Equity in earnings of subsidiaries | 0 | 0 | 0
Interest Income | 92,692 | 90,696 | 90,371
Pretax earnings | 537,522 | 408,487 | 325,636
Income tax expense | (195,131) | (143,779) | (120,269)
Net earnings | 342,391 | 264,708 | 205,367
Less: Excess of redemption value over carrying value of preferred shares redeemed |  |  | (5,908)
Less: Preferred stock dividends |  |  | (2,913)
Earnings available to common shareholders | 342,391 | 264,708 | 196,546
Basic and diluted earnings per common share | $ 17.51 | $ 13.56 | $ 10.09
Weighted average common shares outstanding: basic and diluted | 19,558,758 | 19,518,779 | 19,476,187
AMERCO [Member] |  |  |
Revenues: |  |  |
Net interest income from subsidiaries | 6,465 | 5,329 | 6,085
Expenses: |  |  |
Operating expenses | 6,636 | 13,611 | 9,081
Other expenses | 97 | 97 | 98
Total expenses | 6,733 | 13,708 | 9,179
Equity in earnings of subsidiaries | 287,803 | 212,164 | 149,160
Interest Income | 86,916 | 91,125 | 94,278
Pretax earnings | 374,451 | 294,910 | 240,344
Income tax expense | (32,060) | (30,202) | (34,649)
Net earnings | 342,391 | 264,708 | 205,695
Less: Excess of redemption value over carrying value of preferred shares redeemed |  |  | (5,908)
Less: Preferred stock dividends |  |  | (3,241)
Earnings available to common shareholders | $ 342,391 | $ 264,708 | $ 196,546
Basic and diluted earnings per common share | $ 17.51 | $ 13.56 | $ 10.09
Weighted average common shares outstanding: basic and diluted | 19,558,758 | 19,518,779 | 19,476,187

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- Definition This company-extended concept is a summary of two concepts on the Consolidated Statement of Operations by Industry Segment (Details). The two concepts are (1)LeaseAndRentalExpense -- our label "Lease expense" (2) a company-extended concept DepreciationGainLossOnDispositionOfAssets -- our label "Depreciation, net of (gains) losses on disposals." This second company-extended concept is a combination of two separate concept on the US-GAAP taxonomy: (2a) Depreciation and (2b) GainLossOnDispositionOfAssets. + References No definition available. + Details
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- Definition Total costs of sales and operating expenses for the 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) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition The excess of (1) fair value of the consideration transferred to the holders of the preferred stock over (2) the carrying amount of the preferred stock in the registrant's balance sheet, during the accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section S99 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27010884&loc=d3e42851-122695 + Details
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