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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2009 | Apr. 30, 2011 | Jul. 31, 2011 | Jul. 31, 2010 | Jul. 31, 2009 | Jul. 31, 2011 Heartland [Member] | Oct. 31, 2010 Trademarks [Member] | Jul. 31, 2011 Trademarks [Member] | Apr. 30, 2011 Non-Cash Trademark [Member] | Apr. 30, 2010 Non-Cash Trademark [Member] | Jan. 31, 2009 Non-Cash Trademark [Member]
Aggregate amortization expense for amortizable intangibles |  |  | $ 10,262 | $ 510 | $ 476 |  |  |  |  |  |
Indefinite-lived intangible assets impairment |  | 0 |  |  |  |  | 2,036 |  | 1,430 | 500 | 564
Definite-lived assets, useful life |  |  |  |  |  | 25 |  |  |  |  |
Amortization period, Minimum years |  |  | 20 |  |  |  |  | 20 |  |  |
Amortization period, Maximum years |  |  | 25 |  |  |  |  | 25 |  |  |
Amortization of previously unamortized trademarks, amount |  |  | 126 |  |  |  |  |  |  |  |
Goodwill, Impairment Loss | $ 9,717 | $ 0 |  |  |  |  |  |  |  |  |

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- Definition Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -Clause 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13854-109267 + Details
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