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Segments and Other Geographic Information (Details 1) - USD ($)
$ in Thousands
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Segment Reporting Information, Profit (Loss) [Abstract]      
Total long-lived assets $ 746,823 $ 748,770 $ 712,743
Other      
Segment Reporting Information, Profit (Loss) [Abstract]      
Total long-lived assets 47,174 57,743 44,219
International      
Segment Reporting Information, Profit (Loss) [Abstract]      
Total long-lived assets 171,396 204,076 151,179
Operating segments | North America      
Segment Reporting Information, Profit (Loss) [Abstract]      
Total long-lived assets 580,691 551,182 565,590
Operating segments | United Kingdom      
Segment Reporting Information, Profit (Loss) [Abstract]      
Total long-lived assets $ 118,958 $ 139,845 $ 102,934