Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Jul. 31, 2014 Segment	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013 Reclassification [Member]	Jul. 31, 2012 Reclassification [Member]	Jul. 31, 2011 Reclassification [Member]	Jul. 31, 2013 Customer Lists [Member]	Jul. 31, 2013 Trademarks [Member]	Jul. 31, 2013 Technology and domain names [Member]	Jul. 31, 2014 Equipment [Member]	Jul. 31, 2014 Building [Member]	Jul. 31, 2014 Computer Software [Member]	Jul. 31, 2014 Furniture and Fixtures [Member]	Jul. 31, 2014 Internal-use Software [Member]
Accounting Policies [Line Items]
Number of reportable segments	3
Investments accounted for using the equity method	$ 9,400,000	$ 8,100,000
Investments accounted for using the cost method	1,800,000	1,500,000
Estimated useful lives of Long-Lived assets										5		2	5
Estimated useful lives of Long-Lived assets										7	40	3	7	Excess of one year
Estimated useful lives of Long-Lived assets										20		5	10
Amortization period							15 years	5 years	3 years
Advertising expense	17,200,000	13,100,000	17,000,000
Amortization expense related to capitalized software	7,600,000	6,300,000	5,800,000
Unamortized capitalized internal use software costs	13,200,000	10,200,000
USF charges	600,000	800,000	1,100,000
Percentage of consolidated revenues not exceeded by one single customer	10.00%	10.00%	10.00%
Percentage of consolidated revenues from continuing operations	12.00%	10.00%	8.10%
Percentage of gross trade accounts receivable from customers	22.10%	16.60%
Restricted cash and cash equivalents-long-term	2,763,000	2,767,000		4,600,000
Restricted cash and cash equivalents	$ 25,292,000	$ 23,006,000	$ 7,733,000	$ 2,100,000	$ 2,000,000	$ 8,700,000