Income Taxes (Provision for Income Taxes) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Income Tax Disclosure [Abstract]
Federal - current	$ 12,367,000	$ 11,629,000	$ 7,129,000
Federal - deferred	(2,342,000)	(368,000)	385,000
State and local - current	931,000	1,623,000	1,393,000
State and local - deferred	(25,000)	(33,000)	35,000
Foreign - current	(173,000)	506,000	48,000
Foreign - deferred	0	(1,000)	695,000
Total provision for income taxes	$ 10,758,000	$ 13,356,000	$ 9,685,000