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Savings and Retirement Plans (Tables)
9 Months Ended
Dec. 31, 2014
Savings and Retirement Plans [Abstract]  
Components of benefit costs for defined benefit retirement plans
The cost for our defined benefit retirement plans in The Netherlands and the United Kingdom includes the following components for the three- and nine-month periods ended December 31:

  
Three Months Ended
December 31
  
Nine Months Ended
December 31
 
  
2014
  
2013
  
2014
  
2013
 
         
Gross service cost
 
$
33,000
  
$
32,000
  
$
104,000
  
$
95,000
 
Interest cost
  
34,000
   
36,000
   
107,000
   
104,000
 
Expected return on assets
  
(25,000
)
  
(21,000
)
  
(79,000
)
  
(61,000
)
Amortization
  
1,000
   
2,000
   
3,000
   
5,000
 
Net periodic retirement cost
 
$
43,000
  
$
49,000
  
$
135,000
  
$
143,000