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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Restricted Cash (Details) (USD $)
3 Months Ended
Nov. 30, 2013
Aug. 31, 2013
Restricted Cash and Cash Equivalents Items [Line Items]    
Document Period End Date Nov. 30, 2013  
Restricted Cash and Cash Equivalents, Current $ 3,100,000 $ 5,984,000
Restricted Cash and Cash Equivalents, Noncurrent 26,759,000 34,775,000
Shorttemcertificateofdeposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents, Current 3,100,000 5,984,000
Longtermcertificatesofdeposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents, Noncurrent 26,759,000 34,775,000
longtermstatutorydeposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Deposits with Governmental Agencies 1,039,000 [1] 1,055,000 [1]
Certificates of Deposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents 29,859,000 40,759,000
Banco del Pais [Member] | Land [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Certificates of Deposit, at Carrying Value 200,000 3,148,000
Banco del Pais [Member] | Longtermcertificatesofdeposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Certificates of Deposit, at Carrying Value 1,720,000 [1] 1,720,000 [1]
Banco del Pais [Member] | Loans [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Certificates of Deposit, at Carrying Value 1,200,000 [1] 1,200,000 [1]
Bank Of Colombia [Member] | Land [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Certificates of Deposit, at Carrying Value 1,621,000 1,599,000
Federalregulatoryrequirements [Member] | Shorttemstatutorydeposit [Member] [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Deposits with Governmental Agencies 79,000 [1] 37,000 [1]
Citibank and Scotiabank [Member] | Longtermcertificatesofdeposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Certificates of Deposit, at Carrying Value $ 24,000,000 $ 32,000,000
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