Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2015 USD ($) yr	Jul. 31, 2014 USD ($)	Jul. 31, 2013 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (4,913)	$ (199)
Translation Adjustment Functional to Reporting Currency, Tax Benefit (Expense)	$ 2,578	82	$ 41
Interest rate charged on past due accounts	18.00%
Document Fiscal Year Focus	2015
Interest capitalized on real estate development	$ 0	0	0
Impairment to goodwill or intangible assets	$ 0	0	0
Average remaining period (in years) for initiation fees recognized | yr	14
Refundable period (in years) for initiation fees | yr	30
Advertising expense	$ 27,500	25,700	$ 25,500
Prepaid advertising costs	$ 300	$ 200
Stated percentage in the debt instrument	6.50%