Selected Quarterly Financial Data (Unaudited) (Details Textual) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Selected Quarterly Financial Data [Abstract]
Gain on sale of interest		$ 1,100	$ 75,100		$ 1,200	$ 1,086	$ 76,864
Gain on sale of member interest in Visa Europe Ltd.						7,476
Severance	$ 6,300			$ 200	6,200	6,510	8,363
Other operating loss					$ 1,600	$ (326)	$ (1,552)	$ 835