CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

3 Months Ended

Mar. 31, 2014

Cash And Cash Equivalents [Abstract]

CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

5. CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

It is the Company’s policy to mitigate credit risk in its financial assets by maintaining a well-diversified portfolio that limits the amount of exposure as to maturity and investment type. The following tables summarize the Company’s cash, cash equivalents and short-term investments for each of the periods indicated:

	As of March 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in thousands)
Cash, money market funds, commercial paper and government and government agency bonds	$	49,101	$	—	$	—		$	49,101
Commercial paper		24,892		1		(3	)		24,890
Government and government agency bonds		88,755		4		(14	)		88,745
Corporate bonds		62,503		—		(47	)		62,456
Total	$	225,251	$	5	$	(64	)	$	225,192
As reported:
Cash and cash equivalents		49,101		—		—			49,101
Short-term investments		176,150		5		(64	)		176,091
Total	$	225,251	$	5	$	(64	)	$	225,192

	As of December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
	(in thousands)
Cash and money market funds	$	256,965	$	—	$	—	$	256,965
Total	$	256,965	$	—	$	—	$	256,965
As reported:
Cash and cash equivalents	$	256,965	$	—	$	—	$	256,965
Total	$	256,965	$	—	$	—	$	256,965