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Comprehensive Income (Tables) | 12 Months Ended
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Apr. 30, 2015
Components Of Accumulated Other Comprehensive Income (Loss) | The components of accumulated other comprehensive loss were as follows:
|  | April 30, |
|  | 2015 |  |  | 2014 |
|  | (in thousands) |
Foreign currency translation adjustments |  | $ | (20,919 | ) |  | $ | 15,604 |
Deferred compensation and pension plan adjustments, net of taxes |  |  | (19,708 | ) |  |  | (18,006 | )
Unrealized gains on marketable securities, net of taxes |  |  | 4 |  |  |  | 14 |
Accumulated other comprehensive loss, net |  | $ | (40,623 | ) |  | $ | (2,388 | )
Changes in Each Component of Accumulated Other Comprehensive Income (Loss) | The following tables summarizes the changes in each component of accumulated other comprehensive income (loss):
|  | Foreign Currency Translation |  |  | Deferred Compensation and Pension Plan (1) |  |  | Unrealized Gains (Losses) on Marketable Securities |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (in thousands) |
Balance as of May 1, 2012 |  | $ | 22,813 |  |  | $ | (15,658 | ) |  | $ | 36 |  |  | $ | 7,191 |
Unrealized (losses) gains arising during the period |  |  | (5,254 | ) |  |  | (6,033 | ) |  |  | 13 |  |  |  | (11,274 | )
Reclassification of realized net losses (gains) to net income |  |  | — |  |  |  | 1,455 |  |  |  | (3 | ) |  |  | 1,452 |
Balance as of April 30, 2013 |  |  | 17,559 |  |  |  | (20,236 | ) |  |  | 46 |  |  |  | (2,631 | )
Unrealized (losses) gains arising during the period |  |  | (1,955 | ) |  |  | 136 |  |  |  | (64 | ) |  |  | (1,883 | )
Reclassification of realized net losses to net income |  |  | — |  |  |  | 2,094 |  |  |  | 32 |  |  |  | 2,126 |
Balance as of April 30, 2014 |  |  | 15,604 |  |  |  | (18,006 | ) |  |  | 14 |  |  |  | (2,388 | )
Unrealized losses arising during the period |  |  | (36,523 | ) |  |  | (3,589 | ) |  |  | (10 | ) |  |  | (40,122 | )
Reclassification of realized net losses to net income |  |  | — |  |  |  | 1,887 |  |  |  | — |  |  |  | 1,887 |
Balance as of April 30, 2015 |  | $ | (20,919 | ) |  | $ | (19,708 | ) |  | $ | 4 |  |  | $ | (40,623 | )
(1) | The tax effects on unrealized (losses) gains of $(2.3) million, $0.07 million and $(3.8) million as of April 30, 2015, 2014 and 2013, respectively. The tax effects on reclassifications of realized net losses of $1.2 million, $1.0 million and $0.9 million as of April 30, 2015, 2014 and 2013, respectively.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e526-108580 + Details
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