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Summary of Significant Accounting Policies (Summary Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands | Jul. 31, 2015 | Jul. 31, 2014
--- | --- | ---
Carrying value | $ 806,676 | $ 625,600
6.50% Notes [Member] |  |
Carrying value | 0 | 215,000
Fair value | 0 | 223,600
Industrial Development Bonds [Member] |  |
Carrying value | 0 | 41,200
Fair value | 0 | 48,003
Other Long-Term Debt [Member] |  |
Carrying value | 11,765 | 5,163
Fair value | $ 12,328 | $ 5,758

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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