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Income Taxes (Provision for Income Taxes) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Income Tax Disclosure [Abstract]
Federal - current	$ 11,629,000	$ 7,129,000	$ 14,389,000
Federal - deferred	(368,000)	385,000	(4,194,000)
State and local - current	1,623,000	1,393,000	2,045,000
State and local - deferred	(33,000)	35,000	(380,000)
Foreign - current	506,000	48,000	(240,000)
Foreign - deferred	(1,000)	695,000	4,000
Total provision for income taxes	$ 13,356,000	$ 9,685,000	$ 11,624,000

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.