v3.8.0.1
Pension Plans (Tables)
6 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
Schedule of net benefit costs
The aggregate net pension expense relating to these two plans are as follows (amounts in thousands):

 
Three Months Ended
 
Six Months Ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Service costs
$
388

 
$
363

 
$
741

 
$
727

Interest costs
249

 
241

 
489

 
484

Amortization of actuarial loss
219

 

 
422

 

Settlements and curtailments
(36
)
 

 
(36
)
 
231

Net pension period cost
$
820

 
$
604

 
$
1,616

 
$
1,442