Income Taxes (Components Of Deferred Tax Assets (Liabilities)) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Nov. 30, 2012
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 65,814	$ 62,616
Reserves, accruals and foreign related items	13,680	13,204
Credit carryforwards	21,685	18,534
Depreciation and amortization	10,073	10,073
Deferred revenue	6,247	8,746
Translation gains/losses	2,849	5,673
Stock-based compensation	31,866	28,690
Other	556	94
Deferred tax assets, gross	152,770	147,630
Intangible assets	(26,206)	(37,590)
Convertible debt	(21,680)	(26,573)
Other	(485)	(884)
Deferred tax liabilities, gross	(48,371)	(65,047)
Net deferred tax assets before valuation allowance	104,399	82,583
Net deferred tax assets	$ 104,399	$ 82,583