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Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Apr. 30, 2014
Debt Instrument, Year of Maturity | 2019
Canyons Obligation [Member] |
Debt Instrument, Fair Value Disclosure | $ 310,472
Debt Instrument, Year of Maturity | 2063

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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=28364263&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=28364263&loc=d3e13476-108611 + Details
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