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Fair Value Measurements (Details Textuals) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Jul. 31, 2011
Fair Value Measurements (Textuals) [Abstract]
Long Term Debt Obligation at Fair Value	$ 414,631	$ 416,694
Long Term Debt Obligation at Carrying Value	$ 391,318	$ 393,178

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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