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Savings and Retirement Plans
 6 Months Ended
Sep. 30, 2013
Savings and Retirement Plans [Abstract]  
Savings and Retirement Plans
8. Savings and Retirement Plans

We sponsor various retirement plans for eligible employees in the United States, the United Kingdom (UK), and The Netherlands. Our retirement savings plan in the United States conforms to Section 401(k) of the Internal Revenue Code and participation is available to substantially all employees. We may also make discretionary contributions ratably to all eligible employees. We made discretionary contributions to the U.S. plan of $113 and $121 for the six months ended September 30, 2013 and 2012, respectively.

Our international subsidiaries have defined benefit retirement plans for eligible employees.  These plans provide benefits based on the employee’s years of service and compensation during the years immediately preceding retirement, termination, disability, or death, as defined in the plans.

The cost for our defined benefit retirement plans in The Netherlands and the United Kingdom includes the following components for the three- and six-month periods ended
September 30:

 
 
Three Months Ended
September 30
  
Six Months Ended
September 30
 
 
 
2013
  
2012
  
2013
  
2012
 
 
 
  
  
  
 
Gross service cost
 
$
31
  
$
19
  
$
62
  
$
37
 
Interest cost
  
34
   
30
   
69
   
61
 
Expected return on assets
  
(20
)
  
(5
)
  
(40
)
  
(9
)
Amortization
  
2
   
1
   
3
   
2
 
Net periodic retirement cost
 
$
47
  
$
45
  
$
94
  
$
91