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Statutory Financial Information of Insurance Subsidiaries (Table Text Block) | 12 Months Ended
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Mar. 31, 2013
Insurance [Abstract] |
Statutory Financial Information of Insurance Subsidiaries | Applicable laws and regulations of the State of Arizona require Property and Casualty Insurance and Life Insurance to maintain minimum capital and surplus determined in accordance with statutory accounting principles. Audited statutory net income (loss) and statutory capital and surplus for the years ended are listed below:
|  | Years Ended December 31,
|  | 2012 |  | 2011 |  | 2010
|  | (In thousands)
Repwest: |  |  |  |  |  |
Audited statutory net income (loss) | $ | 16,923 | $ | (37,417 | )$ | 6,946
Audited statutory capital and surplus |  | 94,284 |  | 77,285 |  | 125,102
ARCOA: |  |  |  |  |  |
Audited statutory net income (loss) |  | (1,881 | ) | (362 | ) | (773 | )
Audited statutory capital and surplus |  | 2,201 |  | 2,469 |  | 2,769
Oxford: |  |  |  |  |  |
Audited statutory net income |  | 13,936 |  | 1,677 |  | 4,640
Audited statutory capital and surplus |  | 131,920 |  | 129,445 |  | 129,173
CFLIC: |  |  |  |  |  |
Audited statutory net income |  | 8,734 |  | 8,513 |  | 4,347
Audited statutory capital and surplus |  | 28,042 |  | 36,200 |  | 32,799
NAI: |  |  |  |  |  |
Audited statutory net income (loss) |  | (1,962 | ) | (4,151 | ) | (857 | )
Audited statutory capital and surplus |  | 9,804 |  | 11,564 |  | 11,265
DGLIC:* |  |  |  |  |  |
Audited statutory net income |  | - |  | 1,828 |  | 796
Audited statutory capital and surplus |  | - |  | 7,276 |  | 5,966
* Merged with CFLIC on December 31, 2012. The amount of dividends that can be paid to shareholders by insurance companies domiciled in the State of Arizona is limited. Any dividend in excess of the limit requires prior regulatory approval. The statutory surplus for Repwest at December 31, 2012 that could be distributed as future dividends was $9.9 million. The statutory surplus for Oxford at December 31, 2012 that could be distributed as future dividends was $13.2 million. Repwest and Oxford did not pay a dividend to AMERCO in fiscal 2013.

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- Definition Tabular disclosure of how the entity's reporting under GAAP as of the balance sheet date differs from the results based on prescribed and permitted accounting practices of the state or country of domicile in which a relevant statutory filing is made, or differences in results based on the National Association of Insurance Commissioners (NAIC) prescribed practices, or a combination thereof. Describes the accounting practices used and the related monetary effect on statutory surplus, net income, and risk-based capital. If an insurance enterprise's risk-based capital would have triggered a regulatory event had it not used a permitted practice, that fact is disclosed in the financial statements. Permitted statutory accounting practices include practices not prescribed but allowed by the domiciliary state insurance department regulatory authority. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24790-158529 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 60 -Paragraph 60 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-5 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24746-158529 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.23(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6588579&loc=d3e24938-158530 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6588579&loc=d3e24959-158530 + Details
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