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Comprehensive Income (Tables) | 12 Months Ended
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Apr. 30, 2019
Equity [Abstract] |
Components of Accumulated Other Comprehensive (Loss) Income | The components of accumulated other comprehensive (loss) income were as follows:
|  | April 30, |
|  | 2019 |  |  | 2018 |
|  | (in thousands) |
Foreign currency translation adjustments |  | $ | (60,270 | ) |  | $ | (32,399 | )
Deferred compensation and pension plan adjustments, net of taxes |  |  | (16,838 | ) |  |  | (9,073 | )
Interest rate swap unrealized gain, net of taxes |  |  | 456 |  |  |  | 1,337 |
Accumulated other comprehensive loss, net |  | $ | (76,652 | ) |  | $ | (40,135 | )
Changes in Each Component of Accumulated Other Comprehensive (Loss) Income | The following table summarizes the changes in each component of accumulated other comprehensive (loss) income:
|  | 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 May 1, 2016 |  | $ | (36,339 | ) |  | $ | (21,572 | ) |  | $ | — |  |  | $ | (57,911 | )
Unrealized (losses) gains arising during the period |  |  | (19,020 | ) |  |  | 4,584 |  |  |  | (635 | ) |  |  | (15,071 | )
Reclassification of realized net losses to net income |  |  | — |  |  |  | 1,861 |  |  |  | 57 |  |  |  | 1,918 |
Balance as of April 30, 2017 |  |  | (55,359 | ) |  |  | (15,127 | ) |  |  | (578 | ) |  |  | (71,064 | )
Unrealized gains arising during the period |  |  | 22,960 |  |  |  | 4,813 |  |  |  | 1,465 |  |  |  | 29,238 |
Reclassification of realized net losses to net income |  |  | — |  |  |  | 1,241 |  |  |  | 450 |  |  |  | 1,691 |
Balance as of April 30, 2018 |  |  | (32,399 | ) |  |  | (9,073 | ) |  |  | 1,337 |  |  |  | (40,135 | )
Unrealized losses arising during the period |  |  | (27,871 | ) |  |  | (6,461 | ) |  |  | (800 | ) |  |  | (35,132 | )
Reclassification of realized losses (gains) to net income |  |  | — |  |  |  | 1,092 |  |  |  | (280 | ) |  |  | 812 |
Effect of adoption of accounting standard |  |  | — |  |  |  | (2,396 | ) |  |  | 199 |  |  |  | (2,197 | )
Balance as of April 30, 2019 |  | $ | (60,270 | ) |  | $ | (16,838 | ) |  | $ | 456 |  |  | $ | (76,652 | )
(1) | The tax effects on unrealized (losses) gains were $(2.3) million, $2.5 million and $1.9 million as of April 30, 2019, 2018 and 2017, respectively. The tax effects on reclassifications of realized net losses were $0.4 million, $0.8 million and $1.2 million as of April 30, 2019, 2018 and 2017, respectively.
(2) | The tax effects on unrealized (losses) gains were $(0.3) million, $0.8 million and $(0.4) million as of April 30, 2019, 2018 and 2017, respectively. The tax effect on the reclassification of realized net gains (losses) to net income was $0.1 million and $(0.3) million as of April 30, 2019 and 2018, respectively.

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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=114867106&loc=d3e526-108580 + Details
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