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Fair Value Measurements and Financial Instruments | 9 Months Ended
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Apr. 30, 2012
Fair Value Measurements and Financial Instruments [Abstract] |
Fair Value Measurements and Financial Instruments | (5) Fair Value Measurements and Financial Instruments In accordance with FASB ASC 825, "Financial Instruments," we determined that, as of April 30, 2012 and July 31, 2011, the fair value of our 3.0% convertible senior notes was approximately $221,580,000 and $207,680,000, respectively, based on a quoted market price in an active market. Our 3.0% convertible senior notes are not marked-to-market and are shown in our accompanying Condensed Consolidated Balance Sheets at their original issuance value. As such, changes in the estimated fair value of our 3.0% convertible senior notes are not recorded in our condensed consolidated financial statements. As of April 30, 2012 and July 31, 2011, we had approximately $99,020,000 and $152,878,000, respectively, of money market mutual funds which are classified as cash and cash equivalents in our Condensed Consolidated Balance Sheets. These money market mutual funds are recorded at their current fair value. FASB ASC 820, "Fair Value Measurements and Disclosures," requires us to define fair value as the price that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As such, using the fair value hierarchy described in FASB ASC 820, we valued our money market mutual funds using Level 1 inputs that were based on quoted market prices. As of April 30, 2012 and July 31, 2011, we had no other assets included in our Condensed Consolidated Balance Sheets that are recorded at current fair value. If we acquire different types of assets or incur different types of liabilities in the future, we might be required to use different FASB ASC fair value methodologies.

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -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 Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -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 Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -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. + Details
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