INVESTMENTS

6 Months Ended

May 31, 2014

Investments [Abstract]

INVESTMENTS

INVESTMENTS

Short-term investments and cash equivalents, which are classified as available-for-sale, are summarized below as of May 31, 2014 and November 30, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Aggregate Fair Value
As of May 31, 2014
Money market funds	$	18,810	$	—	$	—	$	18,810
Corporate bonds and commercial paper	158,585		341		—		158,926
U.S. Government debt and agency securities	16,575		2		—		16,577
Mortgage-backed securities	202		146		—		348
	$	194,172	$	489	$	—	$	194,661
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

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

	May 31, 2014		November 30, 2013
Contractual maturities:
Less than one year	$	79,029	$	36,084
One to three years	96,822		47,758
	$	175,851	$	83,842

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.