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Commitments (Tables)
12 Months Ended
Mar. 31, 2012
Leases, Operating [Abstract]  
Future Minimum lease commitments
The future minimum lease commitments under these operating leases at March 31, 2012 were as follows (amounts in thousands):
 

Year Ending March 31,
 
Amount
2013
 
$
9,293

2014
 
7,221

2015
 
4,594

2016
 
3,438

2017
 
3,238

Thereafter
 
2,693

Total minimum payments
 
$
30,477