Long-Term Obligations - Schedule of Maturities of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Debt Disclosure [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 42,514
Long-term Debt, Maturities, Repayments of Principal in Year Two	42,514
Long-term Debt, Maturities, Repayments of Principal in Year Three	56,536
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	60,246
Long-term Debt	$ 201,810	$ 262,414