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REVOLVING CREDIT FACILITY REVOLVING CREDIT FACILITY (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended
Apr. 11, 2013
Senior Revolving Credit Facility Due Fiscal Year 2018 [Member]
Apr. 30, 2013
Senior Revolving Credit Facility Due Fiscal Year 2018 [Member]
Apr. 30, 2013
Letter of Credit [Member]
Apr. 11, 2013
Senior Revolving Credit Facility Due Fiscal Year 2015 [Member]
Jul. 31, 2012
Senior Revolving Credit Facility Due Fiscal Year 2015 [Member]
Debt Instrument [Line Items]          
Debt Instrument Term 5 years        
Line of Credit Facility, Maximum Borrowing Capacity $ 1,200,000     $ 500,000  
Deferred Finance Costs, Gross 3,043        
Line of Credit Facility, Amount Outstanding   $ 0 $ 7,242   $ 0
Debt Instrument, Covenant, Maximum Funded Debt Ratio 3.5