Investments (Tables)

12 Months Ended

Nov. 30, 2013

Investments [Abstract]

Summary Of Marketable Securities Classified As Available-For-Sale

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

	Purchased/Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Aggregate Fair Value
As of November 30, 2013
Money market funds	$	245,953	$	—	$	—		$	245,953
Corporate bonds and commercial paper	77,442		66		—			77,508
U.S Government debt and agency securities	6,012		1		—			6,013
Term deposits	536		—		—			536
Mortgage-backed securities	200		121		—			321
	$	330,143	$	188	$	—		$	330,331
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

Summary Of Contractual Maturities Of Fixed Income Securities Included In Short-Term Investments

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

	November 30,
	2013		2012
Contractual maturities:
Less than one year	$	36,084	$	22,733
One to three years	47,758		11,678
	$	83,842	$	34,411