Goodwill and Purchased and Other Intangibles (Details 1) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012
Purchased technology [Member]
Amortization Expense in Future Periods [Abstract]
Remainder of 2012	$ 18,782
2013	70,209
2014	64,134
2015	49,496
2016	11,509
Thereafter	8,596
Total expected amortization expense	222,726
Other intangible assets [Member]
Amortization Expense in Future Periods [Abstract]
Remainder of 2012	18,063
2013	61,286
2014	56,833
2015	50,819
2016	45,189
Thereafter	122,032
Total expected amortization expense	$ 354,222