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Employee Retirement Plans (Tables)
 6 Months Ended
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Primary Components of Net Periodic Benefits
The primary components of Net Periodic Benefits consist of the following:
 
 
Three Months Ended September 30,
 
Six Months Ended September 30,
 (In thousands)
 
2018

2017
 
2018

2017
Interest cost
 
$
610

 
$
634

 
1,220

 
$
1,263

Expected return on assets
 
(768
)
 
(725
)
 
(1,536
)
 
(1,451
)
Net periodic benefit income
 
$
(158
)
 
$
(91
)
 
$
(316
)
 
$
(188
)