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Retirement Plans (Tables) | 9 Months Ended
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Jan. 31, 2018
Retirement Plans [Abstract] |
Components of Net Periodic Pension (Income) Expense for Defined Benefit Plans | The components of net pension (income) expense for the Company’s global defined benefit plans were as follows:
|  | Three Months Ended January 31, |  |  | Nine Months Ended January 31, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost |  | $ | 243 |  |  | $ | 241 |  |  | $ | 715 |  |  | $ | 744 |
Interest cost |  |  | 6,407 |  |  |  | 6,565 |  |  |  | 19,005 |  |  |  | 20,269 |
Expected return on plan assets |  |  | (9,924 | ) |  |  | (8,588 | ) |  |  | (29,363 | ) |  |  | (26,619 | )
Net amortization of prior service cost |  |  | (24 | ) |  |  | (26 | ) |  |  | (72 | ) |  |  | (75 | )
Recognized net actuarial loss |  |  | 1,536 |  |  |  | 1,268 |  |  |  | 4,550 |  |  |  | 3,900 |
Pension plan actuarial loss |  |  | - |  |  |  | - |  |  |  | 21 |  |  |  | 8,842 |
Net pension (income) expense |  | $ | (1,762 | ) |  | $ | (540 | ) |  | $ | (5,144 | ) |  | $ | 7,061 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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