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Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Jul. 31, 2019
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) | The components of accumulated other comprehensive income (loss) were as follows:
|  | July 31, 2019 |  |  | April 30, 2019 |
|  | (in thousands) |
Foreign currency translation adjustments |  | $ | (65,632 | ) |  | $ | (60,270 | )
Deferred compensation and pension plan adjustments, net of tax |  |  | (16,343 | ) |  |  | (16,838 | )
Interest rate swap unrealized (loss) gain, net of tax |  |  | (139 | ) |  |  | 456 |
Accumulated other comprehensive loss, net |  | $ | (82,114 | ) |  | $ | (76,652 | )
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, 2019:
|  | Foreign Currency Translation |  |  | Deferred Compensation and Pension Plan (1) |  |  | Unrealized (Losses) Gains on Interest Rate Swap (2) |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (in thousands) |
Balance as of April 30, 2019 |  | $ | (60,270 | ) |  | $ | (16,838 | ) |  | $ | 456 |  |  | $ | (76,652 | )
Unrealized losses arising during the period |  |  | (5,362 | ) |  |  | — |  |  |  | (491 | ) |  |  | (5,853 | )
Reclassification of realized net losses (gains) to net income |  |  | — |  |  |  | 495 |  |  |  | (104 | ) |  |  | 391 |
Balance as of July 31, 2019 |  | $ | (65,632 | ) |  | $ | (16,343 | ) |  | $ | (139 | ) |  | $ | (82,114 | )
The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net for the three months ended July 31, 2018:
|  | Foreign Currency Translation |  |  | Deferred Compensation and Pension Plan (1) |  |  | Unrealized Gains on Interest Rate Swap (2) |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (in thousands) |
Balance as of April 30, 2018 |  | $ | (32,399 | ) |  | $ | (9,073 | ) |  | $ | 1,337 |  |  | $ | (40,135 | )
Unrealized (losses) gains arising during the period |  |  | (14,562 | ) |  |  | — |  |  |  | 149 |  |  |  | (14,413 | )
Reclassification of realized net losses (gains) to net loss |  |  | — |  |  |  | 273 |  |  |  | (16 | ) |  |  | 257 |
Effect of adoption of accounting standard |  |  | — |  |  |  | (2,396 | ) |  |  | 199 |  |  |  | (2,197 | )
Balance as of July 31, 2018 |  | $ | (46,961 | ) |  | $ | (11,196 | ) |  | $ | 1,669 |  |  | $ | (56,488 | )
(1) | The tax effect on the reclassifications of realized net losses was $0.2 million and $0.1 million for the three months ended July 31, 2019 and 2018, respectively.
(2) | The tax effect on unrealized (losses) gains was $(0.2) million and $0.1 million for the three months ended July 31, 2019 and 2018, respectively.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e526-108580 + Details
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