Segment Information - Schedule of Segment Reporting Information By Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Segment Reporting Information [Line Items]
Revenues from external customers	$ 305,737	$ 275,388	$ 856,408	$ 813,573
Operating Income (Loss)	30,956	42,956	95,962	125,091
Total profit from reportable segments	71,420	70,827	205,540	215,714
Americas [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	178,559	143,083	470,418	419,862
Operating Income (Loss)	42,942	39,181	119,179	118,871
EMEA [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	94,044	94,136	279,420	279,506
Operating Income (Loss)	22,993	25,566	70,568	78,432
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	33,134	38,169	106,570	114,205
Operating Income (Loss)	5,485	6,080	15,793	18,411
Total Region [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	305,737	275,388	856,408	813,573
Operating Income (Loss)	70,138	70,439	200,491	209,704
Geographical Intersegment, Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	0	0	0	0
Operating Income (Loss)	$ (1,282)	$ (388)	$ (5,049)	$ (6,010)