Business Segment Information - Summary of Operating Results of Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 406,423	$ 411,456	$ 827,093	$ 811,573
Income from operations	7,574	5,655	14,857	12,339
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income from operations	(3,906)	(4,428)	(8,483)	(7,207)
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
Revenues	398,016	402,758	810,741	794,791
Income from operations	12,372	10,050	24,261	19,090
Operating Segments [Member] | Consumer Phone Services [Member]
Segment Reporting Information [Line Items]
Revenues	2,850	3,714	5,866	7,729
Income from operations	421	437	841	1,036
Operating Segments [Member] | Zedge [Member]
Segment Reporting Information [Line Items]
Revenues	1,727	1,626	3,165	2,780
Income from operations	152	185	314	118
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	3,830	3,358	7,321	6,273
Income from operations	$ (1,465)	$ (589)	$ (2,076)	$ (698)