INVESTMENTS (Tables)

6 Months Ended

May 31, 2013

Investments [Abstract]

Summary of Marketable Securities which are Classified as Available-for-Sale

Short-term investments and cash equivalents, which are classified as available-for-sale, are summarized below as of May 31, 2013 and November 30, 2012 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Aggregate Fair Value
As of May 31, 2013
Money market funds	$	335,999	$	—	$	—		$	335,999
Corporate bonds and commercial paper	53,884		64		(19		)	53,929
U.S. Government debt and agency securities	9,575		3		—			9,578
Term deposits	558		—		—			558
Mortgage-backed securities	201		134		(57		)	278
	$	400,217	$	201	$	(76	)	$	400,342
As of November 30, 2012
Money market funds	$	376,480	$	—	$	—		$	376,480
Corporate bonds and commercial paper	24,558		9		(9		)	24,558
U.S. Government debt and agency securities	9,646		—		(1		)	9,645
Term deposits	595		—		—			595
Mortgage-backed securities	182		78		(52		)	208
	$	411,461	$	87	$	(62	)	$	411,486

Investments Classified by Contractual Maturity Date

Fixed income securities included in short-term investments above are summarized by their contractual maturities as follows (in thousands):

	May 31, 2013		November 30, 2012
Contractual maturities:
Less than one year	$	28,831	$	22,733
One to three years	34,954		11,678
	$	63,785	$	34,411