INVESTMENTS

6 Months Ended

May 31, 2013

Investments [Abstract]

INVESTMENTS

INVESTMENTS

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

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

Realized and unrealized gains and losses on our investments were primarily due to changes in interest rates and market and credit conditions of the underlying securities and were insignificant for any period presented.