Goodwill and Intangible Assets (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012 Segment Reporting_unit	Apr. 30, 2011
Goodwill and Intangible Assets (Textual) [Abstract]
Amortization expense of intangible assets	$ 3,944	$ 5,117	$ 12,102	$ 15,387
Projected Future amortization expense, year one			16,205
Projected Future amortization expense, year two			10,381
Projected Future amortization expense, year three			5,466
Projected Future amortization expense, year four			5,128
Projected Future amortization expense, year five			4,058
Decrease in goodwill due to negative effects of foreign currency translation			19,459
Increase (decrease) needed to revise carrying amount of goodwill to fair value			133,920
Number of reporting units identified for impairment analysis			7
Number of reporting segments			3
Impairment result of reorganization			0
Annul reporting segments			3
Annual reporting units			6
Increased customer relationship	961		961
Amount of acquisition increased			$ 1,227
Asia-Pacific [Member]
Goodwill [Line Items]
Number of reporting units identified			2