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Stockholder's Investments - Schedule of Capital Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified | Jul. 31, 2014 | Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2011
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Class of Stock [Line Items] |  |  |  |
Common Stock, Value, Issued | $ 548 | $ 548 | $ 548 | $ 548
Common Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common Stock, Shares Authorized | 100,000,000 |  |  |
Common Stock, Shares, Issued | 51,261,487 |  |  |
Common Stock, Value, Issued | 513 |  |  |
Common Class B [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common Stock, Shares Authorized | 10,000,000 |  |  |
Common Stock, Shares, Issued | 3,538,628 | 3,538,628 |  |
Common Stock, Value, Issued | $ 35 |  |  |
Preferred Stock,$.01 Par [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Stock, Shares Authorized | 5,000,000 |  |  |
Cumulative Preferred Stock, 6% Cumulative [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Stock, Shares Authorized | 5,000 |  |  |
1972 Series [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Stock, Shares Authorized | 10,000 |  |  |
1979 Series [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Stock, Shares Authorized | 30,000 |  |  |

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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.29) -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 30 -Article 5 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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 210.5-02.29) -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 30 -Article 5 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + 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 210.5-02.29) -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 30 -Article 5 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.28) -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 29 -Article 5 + Details
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