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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2013 | Aug. 31, 2013 | May 31, 2014
Line of Credit [Member] | JP Morgan Chase Bank, N.A. [Member] |  |  |
Lines of credit |  |  |
Amount available |  |  | $ 350
Expiration date |  |  | Feb. 28, 2015
Line of Credit [Member] | Bank of America, N.A. [Member] |  |  |
Lines of credit |  |  |
Amount available |  |  | 250
Expiration date |  |  | Feb. 28, 2015
Line of Credit [Member] | PNC Bank, National Association [Member] |  |  |
Lines of credit |  |  |
Amount available |  |  | 150
Expiration date |  |  | Feb. 28, 2015
Line of Credit [Member] | Wells Fargo Bank, National Association [Member] |  |  |
Lines of credit |  |  |
Amount available |  |  | 150
Expiration date |  |  | Feb. 28, 2015
Revolving Credit Facility [Member] |  |  |
Lines of credit |  |  |
Expiration date |  |  | Jun. 21, 2018
Maximum Amount Outstanding During Period | $ 175.0 | $ 25.0 |
Interest Rate on amount borrowed | 3.25% | 3.25% |

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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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