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Retirement Benefits (Tables) | 12 Months Ended
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Apr. 30, 2017
Compensation and Retirement Disclosure [Abstract] |
Summary of Change in Projected Benefit Obligations and Change in Fair Value of Plan Assets | The change in projected benefit obligations and the change in fair value of plan assets for the non-contributory defined benefit pension plans for each of the years ended April 30 are summarized as follows:
$ in thousands |  | 2017 |  |  | 2016 |
Accumulated Benefit Obligation, April 30 |  | $ | 21,313 |  |  | $ | 21,156 |
Change in Projected Benefit Obligations |  |  |  |  |  |  |  |
Projected benefit obligations, beginning of year |  | $ | 21,156 |  |  | $ | 22,441 |
Interest cost |  |  | 927 |  |  |  | 912 |
Actuarial (gain) loss |  |  | 299 |  |  |  | (1,155) |
Actual benefits paid |  |  | (1,069) |  |  |  | (1,042) |
Projected benefit obligations, end of year |  |  | 21,313 |  |  |  | 21,156 |
Change in Plan Assets |  |  |  |  |  |  |  |
Fair value of plan assets, beginning of year |  |  | 15,817 |  |  |  | 17,094 |
Actual (loss) return on plan assets |  |  | 1,895 |  |  |  | (299) |
Employer contributions |  |  | 555 |  |  |  | 64 |
Actual benefits paid |  |  | (1,069) |  |  |  | (1,042) |
Fair value of plan assets, end of year |  |  | 17,198 |  |  |  | 15,817 |
Funded status – under |  | $ | (4,115) |  |  | $ | (5,339) |
Amounts Recognized in the Consolidated Balance Sheets consist of: |  |  |  |  |  |  |  |
Noncurrent liabilities |  | $ | (4,115) |  |  | $ | (5,339) |
Amounts recognized in accumulated other comprehensive income (loss) consist of: |  |  |  |  |  |  |  |
Net actual loss |  | $ | 8,686 |  |  | $ | 10,295 |
Deferred tax benefit |  |  | (3,223) |  |  |  | (3,850) |
After-tax actuarial loss |  | $ | 5,463 |  |  | $ | 6,445 |
Weighted-Average Assumptions Used to Determine Benefit Obligations at April 30 |  |  |  |  |  |  |  |
Discount rate |  |  | 4.10% |  |  |  | 4.50% |
Rate of compensation increase |  |  | N/A |  |  |  | N/A |
Mortality table |  |  | RP-2014 |  |  |  | RP-2014 |
Projection scale |  |  | MP-2016 |  |  |  | MP-2015 |
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended April 30 |  |  |  |  |  |  |  |
Discount rate |  |  | 4.50% |  |  |  | 4.20% |
Expected long-term return on plan assets |  |  | 8.00% |  |  |  | 8.25% |
Rate of compensation increase |  |  | N/A |  |  |  | N/A |
Summary of Components of Net Periodic Pension Cost | The components of the net periodic pension cost for each of the fiscal years ended April 30 are as follows:
$ in thousands |  | 2017 |  |  | 2016 |  |  | 2015 |
Interest cost |  | $ | 927 |  |  | $ | 912 |  |  | $ | 893 |
Expected return on plan assets |  |  | (1,244) |  |  |  | (1,363) |  |  |  | (1,324) |
Recognition of net loss |  |  | 1,257 |  |  |  | 1,223 |  |  |  | 934 |
Net periodic pension cost |  | $ | 940 |  |  | $ | 772 |  |  | $ | 503 |
Summary of Expected Benefit Payments | The following benefit payments are expected to be paid from the benefit plans in the fiscal years ending April 30:
$ in thousands |  | Amount |
2018 |  | $ | 1,250 |
2019 |  |  | 1,270 |
2020 |  |  | 1,310 |
2021 |  |  | 1,360 |
2022 |  |  | 1,370 |
2023-2027 |  |  | 7,010
Summary of Plan Assets by Asset Categories | Plan assets by asset categories as of April 30 were as follows:
$ in thousands |  | 2017 |  |  | 2016 |
Asset Category |  | Amount |  |  | % |  |  | Amount |  |  | % |
Equity Securities |  | $ | 10,611 |  |  |  | 62 |  |  | $ | 11,851 |  |  |  | 75 |
Fixed Income Securities |  |  | 6,466 |  |  |  | 37 |  |  |  | 3,917 |  |  |  | 25 |
Cash and Cash Equivalents |  |  | 121 |  |  |  | 1 |  |  |  | 49 |  |  |  | — |
Totals |  | $ | 17,198 |  |  |  | 100 |  |  | $ | 15,817 |  |  |  | 100 |
Summary of Fair Value Assets in Defined Benefit Pension Plans | The following tables present the fair value of the assets in our defined benefit pension plans at April 30:
|  | 2017 |
Asset Category |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Large Cap |  | $ | 8,060 |  |  | $ | — |  |  | $ | — |
Small/Mid Cap |  |  | 1,728 |  |  |  | — |  |  |  | — |
International |  |  | 823 |  |  |  | — |  |  |  | — |
Fixed Income |  |  | 6,466 |  |  |  | — |  |  |  | — |
Cash and Cash Equivalents |  |  | 121 |  |  |  | — |  |  |  | — |
Totals |  | $ | 17,198 |  |  | $ | — |  |  | $ | — |
|  | 2016 |
Asset Category |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Large Cap |  | $ | 7,946 |  |  | $ | — |  |  | $ | — |
Small/Mid Cap |  |  | 2,586 |  |  |  | — |  |  |  | — |
International |  |  | 1,319 |  |  |  | — |  |  |  | — |
Fixed Income |  |  | 3,917 |  |  |  | — |  |  |  | — |
Cash and Cash Equivalents |  |  | 49 |  |  |  | — |  |  |  | — |
Totals |  | $ | 15,817 |  |  | $ | — |  |  | $ | — |

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- Definition Fair value of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition Disclosure of additional asset categories and amounts within a category that is useful in understanding the risks associated with each asset category. + References No definition available. + Details
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- Definition Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. + 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 (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + 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 (f) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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