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MORTGAGES PAYABLE, PART 2 (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2014
Property
Apr. 30, 2013
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 72,000  
Line of credit facility, amount outstanding 22,500 10,000
Mortgages payable 997,689 1,049,206 [1]
Number of properties securing line of credit 14  
Secured Debt [Member]
   
Line of Credit Facility [Line Items]    
Mortgages payable $ 997,689  
Number of properties securing line of credit 14  
Number of properties not encumbered 49  
[1] (as revised)