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Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | May 31, 2011
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Consolidated Statements of Cash Flows [Abstract] |  |
Surplus notes | $ 3,000 |
Junior surplus notes |  | $ 36,082

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- Definition Junior surplus notes. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Financial instruments issued by insurance entities (surplus notes) that are includable in surplus for statutory accounting purposes as prescribed or permitted by state laws and regulations that are liabilities of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486086&loc=d3e24387-158525 + Details
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Namespace Prefix: | us-gaap_
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