INVESTMENTS - Summary of Marketable Securities which are Classified as Available-for-Sale (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Nov. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 387,514	$ 411,461
Gross Unrealized Gains	131	87
Gross Unrealized Losses	(10)	(62)
Aggregate Fair Value	387,635	411,486
Money market funds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	329,428	376,480
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Aggregate Fair Value	329,428	376,480
Corporate bonds and commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	52,861	24,558
Gross Unrealized Gains	0	9
Gross Unrealized Losses	(10)	(9)
Aggregate Fair Value	52,851	24,558
U.S. Government debt and agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,503	9,646
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	(1)
Aggregate Fair Value	4,504	9,645
Term deposits
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	521	595
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Aggregate Fair Value	521	595
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	201	182
Gross Unrealized Gains	130	78
Gross Unrealized Losses	0	(52)
Aggregate Fair Value	$ 331	$ 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