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Defined Benefit Pension and Other Postretirement Benefit Plans (Tables)
 9 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Schedule of components of net periodic benefit (income) costs relating to pension and other postretirement benefit plans
The components of net periodic benefit (income) costs relating to the Company’s pension and other postretirement benefit plans for the three months ended December 31, 2018 and 2017 are as follows (amounts in thousands):
 
Pension
 
Other Benefits
 
Three Months Ended December 31,
 
Three Months Ended December 31,
 
2018
 
2017
 
2018
 
2017
Net service cost 
$
1,233

 
$
1,307

 
$
—

 
$
—

Interest cost
478

 
425

 
3

 
3

Expected return on net assets
(531
)
 
(501
)
 
—

 
—

Amortization:
 

 
 

 
 

 
 

Actuarial (gain) loss
107

 
91

 
(39
)
 
(47
)
Prior service cost
23

 
20

 
—

 
—

Total net periodic benefit (income) costs
$
1,310

 
$
1,342

 
$
(36
)
 
$
(44
)

The components of net periodic benefit (income) costs relating to the Company’s pension and other postretirement benefit plans for the nine months ended December 31, 2018 and 2017 are as follows (amounts in thousands):
 
Pension
 
Other Benefits
 
Nine Months Ended December 31,
 
Nine Months Ended December 31,
 
2018
 
2017
 
2018
 
2017
Net service cost 
$
3,699

 
$
3,926

 
$
—

 
$
—

Interest cost
1,434

 
1,274

 
9

 
9

Expected return on net assets
(1,594
)
 
(1,502
)
 
—

 
—

Amortization:
 
 
 

 
0

 
 

Actuarial (gain) loss
322

 
271

 
(116
)
 
(141
)
Prior service cost
69

 
60

 
—

 
—

Total net periodic benefit (income) costs
$
3,930

 
$
4,029

 
$
(107
)
 
$
(132
)
All of the amounts in the tables above, other than service cost, were recorded in the line item "Other (income) expense, net" in our Condensed Consolidated Statements of Operations.