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Accounts Receivable (Notes)
6 Months Ended
Sep. 30, 2012
Accounts Receivable, Net [Abstract]  
Accounts Receivable
Accounts Receivable
 
Accounts receivable consists of the following (amounts in thousands):
 
September 30, 2012
 
March 31, 2012
Trade accounts receivable
$
230,203

 
$
171,274

Other
3,476

 
1,529

 
233,679

 
172,803

Less allowance for doubtful accounts
3,222

 
2,602

 
$
230,457

 
$
170,201