Business Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended													12 Months Ended
	Jul. 31, 2017	[1]	Apr. 29, 2017	[2]	Jan. 31, 2017	Oct. 31, 2016	[3]	Jul. 31, 2016	[4]	Apr. 30, 2016	[5]	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Revenue from External Customer [Line Items]
TOTAL REVENUES	$ 394,987		$ 370,035		$ 367,556	$ 369,151		$ 368,075		$ 355,154		$ 382,454	$ 390,578	$ 1,501,729	$ 1,496,261	$ 1,596,777
UCaaS [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														29,450	26,353	29,434
Consumer Phone Services [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														5,482	6,874	8,629
Fabrix [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES																4,170
Zedge [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES															9,474	9,054
Real estate [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														2,292	2,007	2,180
Other [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														446
Retail Communications [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														610,162	664,850	725,860
Wholesale Carrier Services [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														608,634	567,369	609,122
Payment Services [Member]
Revenue from External Customer [Line Items]
TOTAL REVENUES														$ 245,263	$ 219,334	$ 208,328

[1] Included in net loss was income tax expense of $11.1 million from an increase in the valuation allowance on deferred tax assets.

[2] Included in loss from operations was expense of $10.1 million related to a legal settlement and mutual release, including legal fees incurred in the quarter.

[3] Included in net income was a benefit from income taxes of $16.6 million from the full recognition of certain deferred tax assets.

[4] Included in income from operations was severance expense of $6.3 million and gain on sale of member interest in Visa Europe Ltd. of $7.5 million.

[5] Included in income from operations was gain on sale of interest in Fabrix Systems Ltd. of $1.1 million.