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Defined Benefit Pension Plans | 9 Months Ended
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Jan. 31, 2021
Retirement Benefits [Abstract] |
Defined Benefit Pension Plans | Defined Benefit Pension Plans The Company has non-contributory defined benefit pension plans covering substantially all domestic salaried and hourly employees. These plans were amended as of April 30, 2005; no further benefits have been, or will be, earned under the plans, subsequent to the amendment date, and no additional participants will be added to the plans. The Company contributed $30,000 to the plans during the three and nine months ended January 31, 2021. There were no Company contributions paid to the plans during the three and nine months ended January 31, 2020. The Company assumed an expected long-term rate of return of 7.75% for the periods ended January 31, 2021 and January 31, 2020. Pension expense consisted of the following (in thousands):
| Three Months Ended January 31, 2021 |  | Three Months Ended January 31, 2020
Service cost | $ | 0 |  |  | $ | 0 |
Interest cost | 181 |  |  | 208 |
Expected return on plan assets | (321) |  |  | (355) |
Recognition of net loss | 428 |  |  | 260 |
Net periodic pension expense | $ | 288 |  |  | $ | 113 |
| Nine Months Ended January 31, 2021 |  | Nine Months Ended January 31, 2020
Service cost | $ | 0 |  |  | $ | 0 |
Interest cost | 543 |  |  | 624 |
Expected return on plan assets | (963) |  |  | (1,065) |
Recognition of net loss | 1,285 |  |  | 780 |
Net periodic pension expense | $ | 865 |  |  | $ | 339 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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