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Fair Value Disclosures (Fair Value Hierarchy, Carrying Values, and Estimated Fair Values of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified | Jan. 29, 2013 Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Feb. 28, 2014 Carrying Value Level 2 | Nov. 30, 2013 Carrying Value Level 2 | Feb. 28, 2014 Carrying Value Level 2 Senior Notes [Member] | Nov. 30, 2013 Carrying Value Level 2 Senior Notes [Member] | Feb. 28, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 | Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 | Feb. 28, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member] | Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member]
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |
Estimated Fair Value |  |  |  | $ 1,907,220 | $ 1,906,883 |  |  | $ 2,121,250 | $ 2,069,325
Convertible Debt, Fair Value Disclosures |  | $ 230,000 | $ 230,000 |  |  | $ 249,263 | $ 224,825 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.375% |  |  |  |  |  |  |  |

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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
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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 Fair value portion of notes payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 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 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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