INVESTMENTS (Tables)

6 Months Ended

May 31, 2012

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

Marketable securities, which are classified as available-for-sale and included either in cash and cash equivalents if their maturities were three months or less or in short term investments on the Condensed Consolidated Balance Sheet, are summarized below as of May 31, 2012 and November 30, 2011 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Aggregate Fair Value
As of May 31, 2012:
Money market funds	$	441,427	$	—	$	—		$	441,427
Term deposits		542		—		—			542
Mortgage-backed securities		187		55		(37	)		205
	$	442,156	$	55	$	(37	)	$	442,174
As of November 30, 2011:
Money market funds	$	16,664	$	—	$	—		$	16,664
Term deposits		560		—		—			560
Mortgage-backed securities		200		51		(26	)		225
	$	17,424	$	51	$	(26	)	$	17,449