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Pension Benefits (Tables) | 9 Months Ended
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Jan. 31, 2018
Pension and Other Postretirement Benefit Expense [Abstract] |
Net Periodic Pension (Benefit) Cost | Net periodic pension (benefit) cost consisted of the following for the three- and nine-month periods ended January 31, 2018 and 2017:
|  | Three Months Ended |  | Nine Months Ended
|  | January 31, |  | January 31,
(in thousands) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Interest cost |  | $ | 1,431 |  |  | $ | 1,443 |  |  | $ | 4,295 |  |  | $ | 4,329 |
Expected return on plan assets |  | (2,234 | ) |  | (2,019 | ) |  | (6,702 | ) |  | (6,059 | )
Recognized net actuarial loss |  | 401 |  |  | 442 |  |  | 1,201 |  |  | 1,328 |
Net periodic pension benefit |  | $ | (402 | ) |  | $ | (134 | ) |  | $ | (1,206 | ) |  | $ | (402 | )

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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=65897934&loc=d3e1928-114920 + Details
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