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Employee Retirement Plans (Tables)
 6 Months Ended
Sep. 30, 2017
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:
 (In thousands)
Three Months Ended September 30, 2017
 
Six Months Ended September 30, 2017
Interest cost
$
634

 
$
1,263

Expected return on assets
(725
)
 
(1,451
)
Net periodic benefit cost (income)
$
(91
)
 
$
(188
)