Retirement Benefits - Summary of Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
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Apr. 30, 2015 |
Apr. 30, 2014 |
Apr. 30, 2013 |
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Compensation and Retirement Disclosure [Abstract] | |||
Interest cost | $ 893 | $ 857 | $ 906 |
Expected return on plan assets | (1,324) | (1,282) | (1,213) |
Recognition of net loss | 934 | 1,142 | 1,102 |
Net periodic pension cost | $ 503 | $ 717 | $ 795 |
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- References No definition available.
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- Definition An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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