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Pension and Other Postretirement Benefits
3 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
The following summarizes the components of net periodic benefit cost:
Pension Benefits
Three Months Ended June 30,
20192018
Operating expenses:
Service cost$117 $120 
Interest expense:
Interest expense1,029 1,155 
Expected return on plan assets(1,121)(1,286)
Amortization of prior service cost10 11 
Actuarial loss456 422 
Net periodic pension cost$491 $422 

Other Postretirement Benefits
Three Months Ended June 30,
20192018
Operating expenses:
Service cost$$
Interest expense:
Interest expense82 83 
Amortization of prior service cost(177)(177)
Actuarial loss109 109 
Net periodic pension cost$16 $19 
For the three months ended June 30, 2019, contributions were made to pension plans and postretirement health and life insurance benefits of approximately $1,463 and $102, respectively. Additional contributions to pension plans and postretirement health and life insurance benefits of approximately $5,171 and $386, respectively, are expected during the remainder of fiscal 2020.