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Commitments and Contingencies (Tables)
12 Months Ended
Mar. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Minimum annual aggregate rentals under operating leases and service agreements
2013
 
$
148,202

2014
 
118,146

2015
 
107,880

2016
 
96,379

2017
 
87,710

Thereafter
 
489,268

Total
 
$
1,047,585

Schedule of Rent Expense
 
 
2012
 
2011
 
2010
Rental expense
 
$
140,285

 
$
137,072

 
$
137,771

Less: sublease income
 
14,310

 
10,848

 
8,573

Net rent expense
 
$
125,975

 
$
126,224

 
$
129,198