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Pension And Other Postretirement Benefit Plans
 9 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Disclosure PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS
The Company sponsors several defined benefit pension plans covering U.S. salaried employees and certain foreign and other employee groups. These plans provide retirement benefits based primarily on employee compensation and years of service. The Company also sponsors defined benefit plans that provide postretirement health and life insurance benefits for eligible U.S. employees attaining specific age and service levels, although postretirement life insurance is no longer provided for active employees.

The components of the Company’s net periodic benefit cost were as follows:
Pension BenefitsOther Postretirement Benefits
Three Months Ended December 31,Three Months Ended December 31,
(in thousands of dollars)2020201920202019
Service cost$1,603 $1,529 $48 $53 
Interest cost2,403 2,678 286 322 
Expected return on plan assets(3,676)(4,151)(24)(24)
Net amortization and deferral1,120 696 (139)(154)
Net periodic benefit cost
$1,450 $752 $171 $197 
Pension BenefitsOther Postretirement Benefits
Nine Months Ended December 31,Nine Months Ended December 31,
(in thousands of dollars)2020201920202019
Service cost$4,691 $4,595 $145 $159 
Interest cost7,316 8,125 859 986 
Expected return on plan assets(11,032)(12,557)(72)(80)
Net amortization and deferral3,361 2,092 (424)(459)
Net periodic benefit cost
$4,336 $2,255 $508 $606 

During the nine months ended December 31, 2020, the Company made contributions of approximately $6.7 million to its pension plans. Additional contributions of $0.4 million are expected during the remaining three months of fiscal year 2021.