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Debt (Details) - Schedule of debt (Parentheticals) | Nov. 30, 2013 | May 31, 2013 | Nov. 30, 2012
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Line of Credit [Member] |  |  |
Debt (Details) - Schedule of debt (Parentheticals) [Line Items] |  |  |
Lines of credit weighted average interest rate | 5.10% | 9.00% | 4.70%
Notes Due 2013 [Member] |  |  |
Debt (Details) - Schedule of debt (Parentheticals) [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.00%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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