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Fair Value of Financial Instruments (Tables)
6 Months Ended
Oct. 31, 2013
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on Recurring Basis

As of October 31, 2013 our assets and liabilities that are measured at fair value on a recurring basis included the following:

 

     Fair Value Measurement at October 31, 2013 Using:  
     Quoted Prices in
Active Markets
(Level 1)
     Significant Other
Observable Inputs
(Level 2)
     Significant
Unobservable Inputs
(Level 3)
 

Assets:

        

Restricted assets

   $ 645       $ —         $ —     
  

 

 

    

 

 

    

 

 

 

Liabilities:

        

Interest rate derivatives

   $ —         $ 3,338       $ —     
  

 

 

    

 

 

    

 

 

 

As of April 30, 2013 our assets and liabilities that are measured at fair value on a recurring basis included the following:

 

     Fair Value Measurement at April 30, 2013 Using:  
     Quoted Prices in
Active Markets
(Level 1)
     Significant Other
Observable Inputs
(Level 2)
     Significant
Unobservable Inputs
(Level 3)
 

Assets:

        

Restricted assets

   $ 545       $ —         $ —     
  

 

 

    

 

 

    

 

 

 

Liabilities:

        

Interest rate derivatives

   $ —         $ 4,229       $ —