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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jul. 31, 2016
Jul. 31, 2015
Accrued Expenses [Abstract]    
Carrier minutes termination $ 34,719 $ 47,317
Carrier network connectivity, toll-free and 800 services 3,046 7,071
Regulatory fees and taxes 48,369 50,797
Legal settlements 2,069 2,059
Compensation costs 14,471 14,138
Legal and professional fees 4,315 4,938
Other 10,445 12,952
TOTAL $ 117,434 $ 139,272