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Marketable Securities (Tables) | 9 Months Ended
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Jan. 31, 2012
Marketable Securities [Abstract] |
Summary Of Marketable Securities | As of January 31, 2012, marketable securities consisted of the following:
|  | Trading |  |  | Available-for- Sale (2) |  |  | Total |
|  | (in thousands) |
Mutual funds (1) |  | $ | 80,500 |  |  | $ | — |  |  | $ | 80,500 |
Corporate bonds |  |  | — |  |  |  | 45,725 |  |  |  | 45,725 |
Commercial paper |  |  | — |  |  |  | 5,981 |  |  |  | 5,981 |
U.S. Treasury and agency securities |  |  | — |  |  |  | 2,002 |  |  |  | 2,002 |
Total |  |  | 80,500 |  |  |  | 53,708 |  |  |  | 134,208 |
Less: current portion of marketable securities |  |  | (7,566 | ) |  |  | (34,513 | ) |  |  | (42,079 | )
Non-current marketable securities |  | $ | 72,934 |  |  | $ | 19,195 |  |  | $ | 92,129 |
As of April 30, 2011, marketable securities consisted of the following:
|  | Trading |  |  | Available-for- Sale (2) |  |  | Total |
|  | (in thousands) |
Mutual funds (1) |  | $ | 71,363 |  |  | $ | — |  |  | $ | 71,363 |
Corporate bonds |  |  | — |  |  |  | 40,444 |  |  |  | 40,444 |
U.S. Treasury and agency securities |  |  | — |  |  |  | 9,424 |  |  |  | 9,424 |
Commercial paper |  |  | — |  |  |  | 1,000 |  |  |  | 1,000 |
Total |  |  | 71,363 |  |  |  | 50,868 |  |  |  | 122,231 |
Less: current portion of marketable securities |  |  | (5,081 | ) |  |  | (15,787 | ) |  |  | (20,868 | )
Non-current marketable securities |  | $ | 66,282 |  |  | $ | 35,081 |  |  | $ | 101,363 |
(1) | These investments are held in trust for settlement of the Company's obligations under certain of its deferred compensation plans with $7.6 million and $5.1 million classified as current assets as of January 31, 2012 and April 30, 2011, respectively (see Note 7).
(2) | These securities represent excess cash invested, under our investment policy, with a professional money manager.
Schedule Of Amortized Cost And Fair Values Of Marketable Securities Classified As Available-For-Sale Investments |
|  | January 31, 2012 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses (1) |  |  | Estimated Fair Value |
|  | (in thousands) |
Corporate bonds |  | $ | 45,730 |  |  | $ | 85 |  |  | $ | (90 | ) |  | $ | 45,725 |
Commercial paper |  |  | 5,988 |  |  |  | — |  |  |  | (7 | ) |  |  | 5,981 |
U.S. Treasury and agency securities |  |  | 2,003 |  |  |  | — |  |  |  | (1 | ) |  |  | 2,002 |
Total |  | $ | 53,721 |  |  | $ | 85 |  |  | $ | (98 | ) |  | $ | 53,708 |
|  | April 30, 2011 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses (1) |  |  | Estimated Fair Value |
|  | (in thousands) |
Corporate bonds |  | $ | 40,369 |  |  | $ | 107 |  |  | $ | (32 | ) |  | $ | 40,444 |
U.S. Treasury and agency securities |  |  | 9,427 |  |  |  | 10 |  |  |  | (13 | ) |  |  | 9,424 |
Commercial paper |  |  | 1,000 |  |  |  | — |  |  |  | — |  |  |  | 1,000 |
Total |  | $ | 50,796 |  |  | $ | 117 |  |  | $ | (45 | ) |  | $ | 50,868 |
(1) | There are no marketable securities that have been in a continuous unrealized loss position for 12 months or more.
Summary Of Financial Assets Measured At Fair Value |
|  | January 31, 2012 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | (in thousands) |
Cash equivalents, including restricted cash |  | $ | 71,630 |  |  | $ | 71,630 |  |  | $ | — |  |  | $ | — |
Mutual funds |  |  | 80,500 |  |  |  | 80,500 |  |  |  | — |  |  |  | — |
Corporate bonds |  |  | 45,725 |  |  |  | — |  |  |  | 45,725 |  |  |  | — |
Commercial paper |  |  | 5,981 |  |  |  | — |  |  |  | 5,981 |  |  |  | — |
U.S. Treasury and agency securities |  |  | 2,002 |  |  |  | — |  |  |  | 2,002 |  |  |  | — |
Total |  | $ | 205,838 |  |  | $ | 152,130 |  |  | $ | 53,708 |  |  | $ | — |
|  | April 30, 2011 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | (in thousands) |
Cash equivalents, including restricted cash |  | $ | 120,840 |  |  | $ | 120,840 |  |  | $ | — |  |  | $ | — |
Mutual funds |  |  | 71,363 |  |  |  | 71,363 |  |  |  | — |  |  |  | — |
Corporate bonds |  |  | 40,444 |  |  |  | — |  |  |  | 40,444 |  |  |  | — |
U.S. Treasury and agency securities |  |  | 9,424 |  |  |  | — |  |  |  | 9,424 |  |  |  | — |
Commercial paper |  |  | 1,000 |  |  |  | — |  |  |  | 1,000 |  |  |  | — |
Total |  | $ | 243,071 |  |  | $ | 192,203 |  |  | $ | 50,868 |  |  | $ | — |
Summary Of Assets Measured At Fair Value On Recurring Basis Using Significant Unobservable Inputs |
|  | Three Months Ended January 31, |  |  | Nine Months Ended January 31, |
Auction Rate Securities |  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Balance, beginning of period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8,200 |
Auction rate securities put option |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (745 | )
Realized gain included in operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 745 |
Sale of securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (8,200 | )
Balance, end of period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 -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 Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, 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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 + Details
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