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Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Jul. 31, 2017
Components of Accumulated Other Comprehensive Loss | The components of accumulated other comprehensive loss were as follows:
|  | July 31, 2017 |  |  | April 30, 2017 |
|  | (in thousands) |
Foreign currency translation adjustments |  | $ | (39,275 | ) |  | $ | (55,359 | )
Deferred compensation and pension plan adjustments, net of tax |  |  | (14,775 | ) |  |  | (15,127 | )
Interest rate swap unrealized loss, net of taxes |  |  | (641 | ) |  |  | (578 | )
Accumulated other comprehensive loss, net |  | $ | (54,691 | ) |  | $ | (71,064 | )
Changes in Each Component of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the changes in each component of accumulated other comprehensive income (loss) for the three months ended July 31, 2017:
|  | Foreign Currency Translation |  |  | Deferred Compensation and Pension Plan (1) |  |  | Unrealized (losses) on interest rate swap (2) |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (in thousands) |
Balance as of April 30, 2017 |  | $ | (55,359 | ) |  | $ | (15,127 | ) |  | $ | (578 | ) |  | $ | (71,064 | )
Unrealized gains (losses) arising during the period |  |  | 16,084 |  |  |  | — |  |  |  | (234 | ) |  |  | 15,850 |
Reclassification of realized net losses to net income |  |  | — |  |  |  | 352 |  |  |  | 171 |  |  |  | 523 |
Balance as of July 31, 2017 |  | $ | (39,275 | ) |  | $ | (14,775 | ) |  | $ | (641 | ) |  | $ | (54,691 | )
The following table summarizes the changes in each component of accumulated other comprehensive income (loss) for the three months ended July 31, 2016:
|  | Foreign Currency Translation |  |  | Deferred Compensation and Pension Plan (1) |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (in thousands) |
Balance as of April 30, 2016 |  | $ | (36,339 | ) |  | $ | (21,572 | ) |  | $ | (57,911 | )
Unrealized losses arising during the period |  |  | (13,128 | ) |  |  | — |  |  |  | (13,128 | )
Reclassification of realized net losses to net income |  |  | — |  |  |  | 462 |  |  |  | 462 |
Balance as of July 31, 2016 |  | $ | (49,467 | ) |  | $ | (21,110 | ) |  | $ | (70,577 | )
(1) | The tax effect on the reclassifications of realized net losses was $0.2 million and $0.3 million for the three months ended July 31, 2017 and 2016, respectively.
(2) | The tax effect on unrealized (losses) was $0.1 million for the three months ended July 31, 2017. The tax effect on the reclassification of realized net losses to net income was $0.1 million for the three months ended July 31, 2017.

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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=84228862&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=84228862&loc=d3e526-108580 + Details
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