Income Taxes Components of Income before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Components of Income Before Income Taxes [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 142,190	$ 45,895	$ 60,906
Income (Loss) from Continuing Operations before Income Taxes, Foreign	7,138	(1,823)	(1,677)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 149,328	$ 44,072	$ 59,229