Business Segment Information - Summary of Operating Results of Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 420,670	$ 400,117
Income from operations	7,283	6,684
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income from operations	(4,577)	(2,778)
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
Revenues	412,726	392,033
Income from operations	11,889	9,039
Operating Segments [Member] | Consumer Phone Services [Member]
Segment Reporting Information [Line Items]
Revenues	3,016	4,015
Income from operations	420	599
Operating Segments [Member] | Zedge [Member]
Segment Reporting Information [Line Items]
Revenues	1,437	1,154
Income from operations	162	(68)
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	3,491	2,915
Income from operations	$ (611)	$ (108)