INVESTMENTS - Summary of Marketable Securities which are Classified as Available-for-Sale (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	Nov. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 400,217	$ 411,461
Gross Unrealized Gains	201	87
Gross Unrealized Losses	(76)	(62)
Aggregate Fair Value	400,342	411,486
Money market funds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	335,999	376,480
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Aggregate Fair Value	335,999	376,480
Corporate bonds and commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	53,884	24,558
Gross Unrealized Gains	64	9
Gross Unrealized Losses	(19)	(9)
Aggregate Fair Value	53,929	24,558
U.S. Government debt and agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,575	9,646
Gross Unrealized Gains	3	0
Gross Unrealized Losses	0	(1)
Aggregate Fair Value	9,578	9,645
Term deposits
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	558	595
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Aggregate Fair Value	558	595
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	201	182
Gross Unrealized Gains	134	78
Gross Unrealized Losses	(57)	(52)
Aggregate Fair Value	$ 278	$ 208

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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+ Details

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details