Other Operating Gains, Net - Schedule of Other Operating Gains Loss Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Apr. 30, 2014		Apr. 30, 2013		Apr. 30, 2014		Apr. 30, 2013
Other Operating Gains, Net [Abstract]
Telecom Platform Services-gains related to legal matters, net			$ 9,601		$ 650		$ 9,251
All Other-gain on insurance claim		[1]		[1]	571	[1]		[1]
All Other-other					67
Corporate-loss related to settlement		[2]		[2]	(79)	[2]		[2]
Total other operating gains, net			$ 9,601		$ 1,209		$ 9,251

[1] In the nine months ended April 30, 2014, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company's building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.

[2] In the nine months ended April 30, 2014, the Company incurred a loss of $0.1 million in connection with the June 2013 settlement of outstanding claims and disputes with the former Chief Executive Officer of Straight Path Spectrum, Inc. and his related parties.