Income Taxes (Provision for Income Taxes) (Details) (USD $)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Income Tax Disclosure [Abstract]
Federal - current	$ 7,129,000	$ 14,389,000	$ 29,735,000
Federal - deferred	385,000	(4,194,000)	683,000
State and local - current	1,393,000	2,045,000	3,683,000
State and local - deferred	35,000	(380,000)	62,000
Foreign - current	48,000	(240,000)	(270,000)
Foreign - deferred	695,000	4,000	16,000
Total provision for income taxes	$ 9,685,000	$ 11,624,000	$ 33,909,000