Business Segment Information - Summary of Operating Results of Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Segment Reporting Information [Line Items]
REVENUES	$ 412,108	$ 396,936	$ 411,456	$ 400,117	$ 384,750	$ 379,576	$ 365,314	$ 376,643	$ 1,620,617	$ 1,506,283	$ 1,351,416
Income (loss) from operations	1,366	15,687	5,655	6,683	2,821	(3,108)	4,121	(10,930)	29,391	(7,096)	7,385
Depreciation and amortization									14,910	16,648	20,952
Impairment of building and improvements	4,400								4,359
Severance and other charges											1,053
Corporate [Member]
Segment Reporting Information [Line Items]
REVENUES
Income (loss) from operations									(14,001)	(13,152)	(16,105)
Depreciation and amortization									96	260	605
Impairment of building and improvements
Severance and other charges											127
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
REVENUES									1,587,623	1,477,091	1,316,601
Income (loss) from operations									48,495	5,945	21,608
Depreciation and amortization									12,339	14,208	17,628
Impairment of building and improvements
Severance and other charges											926
Operating Segments [Member] | Consumer Phone Services [Member]
Segment Reporting Information [Line Items]
REVENUES									14,514	19,307	26,440
Income (loss) from operations									1,824	4,062	7,100
Depreciation and amortization									1	9	59
Impairment of building and improvements
Severance and other charges
Operating Segments [Member] | Zedge [Member]
Segment Reporting Information [Line Items]
REVENUES									5,811	3,793	3,216
Income (loss) from operations									340	(248)	(202)
Depreciation and amortization									798	652	566
Impairment of building and improvements
Severance and other charges
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
REVENUES									12,669	6,092	5,159
Income (loss) from operations									(7,267)	(3,703)	(5,016)
Depreciation and amortization									1,676	1,519	2,094
Impairment of building and improvements									4,359
Severance and other charges