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Defined Benefit Pension Plans
 9 Months Ended
Jan. 31, 2023
Retirement Benefits [Abstract]  
Defined Benefit Pension Plans Defined Benefit Pension PlansThe 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. There were no Company contributions paid to the plans for the three and nine months ended January 31, 2023 and January 31, 2022. The Company assumed an expected long-term rate of return of 7.75% for the periods ended January 31, 2023 and January 31, 2022.
Pension expense / (income) consisted of the following (in thousands):
Three Months Ended
January 31, 2023January 31, 2022
Service cost$— $— 
Interest cost211 177 
Expected return on plan assets(350)(401)
Recognition of net loss157 136 
Net periodic pension expense (income)$18 $(88)
Nine Months Ended
January 31, 2023January 31, 2022
Service cost$— $— 
Interest cost633 531 
Expected return on plan assets(1,051)(1,203)
Recognition of net loss471 406 
Net periodic pension expense (income)$53 $(266)