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Accrued Liabilities (Tables)
12 Months Ended
Mar. 31, 2013
Liabilities, Current [Abstract]  
Accrued liabilities
Accrued liabilities consist of the following (amounts in thousands):
 
March 31, 2013
 
March 31, 2012
Acquisition related contingent consideration
$
19,100

 
$

Other accrued expenses
108,008

 
88,877

 
$
127,108

 
$
88,877