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Supplemental Information (for Property-Casualty Insurance Operations) | 12 Months Ended
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Mar. 31, 2013
Supplemental Information for Property, Casualty Insurance Underwriters [Abstract] |
Schedule V - AMERCO and Consolidated Subsidiaries Supplemental Information (For Property-Casualty Insurance Operations) | SCHEDULE V AMERCO AND CONSOLIDATED SUBSIDIARIES SUPPLEMENTAL INFORMATION (FOR PROPERTY-CASUALTY INSURANCE Operations) Years Ended December 31, 2012, 2011 AND 2010
Fiscal Year |  | Affiliation with Registrant |  | Deferred Policy Acquisition Cost |  | Reserves for Unpaid Claims and Adjustment Expenses |  | Discount if any, Deducted |  | Unearned Premiums |  | Net Earned Premiums (1) |  | Net Investment Income (2) |  | Claim and Claim Adjustment Expenses Incurred Related to Current Year |  | Claim and Claim Adjustment Expenses Incurred Related to Prior Year |  | Amortization of Deferred Policy Acquisition Costs |  | Paid Claims and Claim Adjustment Expense |  | Net Premiums Written (1)
(In thousands)
2013 |  | Consolidated property casualty entity | $ | - | $ | 330,093 | $ | N/A | $ | - | $ | 34,342 | $ | 8,976 | $ | 8,962 | $ | 7,036 | $ | - | $ | 20,807 | $ | 34,378
2012 |  | Consolidated property casualty entity |  | - |  | 382,328 |  | N/A |  | - |  | 32,631 |  | 9,664 |  | 9,297 |  | 56,445 |  | - |  | 16,319 |  | 32,627
2011 |  | Consolidated property casualty entity |  | - |  | 276,355 |  | N/A |  | 4 |  | 30,704 |  | 8,234 |  | 9,453 |  | 7,832 |  | - |  | 17,211 |  | 30,706
(1) The earned and written premiums are reported net of intersegment transactions. There were no earned premiums eliminated for the years ended December 31, 2012, 2011 and 2010, respectively. (2) Net Investment Income excludes net realized (gains) losses on investments of ($4.9) million, ($0.3) million and $0.3 million for the years ended December 31, 2012, 2011 and 2010, respectively.

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- Definition The entire disclosure for the supplemental schedule of information for an entity who has a consolidated property-casualty insurance underwriter, unconsolidated property-casualty subsidiary or fifty percent-or-less owned property-casualty equity investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=6588446&loc=d3e575016-122915 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 18 -Article 12 + Details
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