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Comprehensive Income (Tables) | 9 Months Ended
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Jan. 31, 2012
Comprehensive Income [Abstract] |
Schedule Of Comprehensive Income |
|  | Three Months Ended January 31, |  |  | Nine Months Ended January 31, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Net income |  | $ | 11,717 |  |  | $ | 13,975 |  |  | $ | 42,275 |  |  | $ | 38,535 |
Foreign currency translation adjustments |  |  | (7,973 | ) |  |  | (185 | ) |  |  | (14,967 | ) |  |  | 3,789 |
Unrealized gains (losses) on marketable securities, net of taxes |  |  | 47 |  |  |  | (63 | ) |  |  | (42 | ) |  |  | (22 | )
Comprehensive income |  | $ | 3,791 |  |  | $ | 13,727 |  |  | $ | 27,266 |  |  | $ | 42,302 |
Schedule Of Accumulated Other Comprehensive Income |
|  | January 31, 2012 |  |  | April 30, 2011 |
|  | (in thousands) |
Foreign currency translation adjustments |  | $ | 20,672 |  |  | $ | 35,639 |
Defined benefit pension adjustments, net of taxes |  |  | (10,014 | ) |  |  | (10,014 | )
Unrealized (losses) gains on marketable securities, net of taxes |  |  | (7 | ) |  |  | 35 |
Accumulated other comprehensive income |  | $ | 10,651 |  |  | $ | 25,660 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 220 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 45 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e526-108580 + Details
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