v3.25.4
Pension And Other Postretirement Benefit Plans (Tables)
 9 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Components of Company's Net Periodic Benefit Cost
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)2025202420252024
Service cost$1,260 $1,315 $18 $22 
Interest cost2,261 2,875 266 259 
Expected return on plan assets(3,026)(3,606)(10)(13)
Net amortization and deferral84 174 (159)(157)
Net periodic benefit cost
$579 $758 $115 $111 
Pension BenefitsOther Postretirement Benefits
Nine Months Ended December 31,Nine Months Ended December 31,
(in thousands of dollars)2025202420252024
Service cost$3,771 $3,956 $52 $69 
Interest cost6,796 8,629 794 794 
Expected return on plan assets(9,080)(10,820)(32)(41)
Net amortization and deferral250 522 (480)(477)
Net periodic benefit cost
$1,737 $2,287 $334 $345