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Fair Value Disclosures (Tables)
12 Months Ended
Mar. 31, 2013
Fair Value Disclosures [Abstract]  
Fair value of financial assets
Following are the disclosures related to our financial assets (dollars in thousands):
 
March 31, 2013
 
March 31, 2012
 
Fair Value
 
Input Level
 
Fair Value
 
Input Level
Available-for-sale marketable securities
 
 
 
 
 
 
 
Municipal tax exempt bond funds
$

 
 
 
$
22,227

 
Level 1
Adjustable-rate governmental bond funds
16,588

 
Level 1