Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Summary of Financial Assets, and Liabilities, Allocated into Level 1, Level 2, and Level 3 Measured on Recurring Basis

The following table sets forth the fair value of our financial assets and liabilities, allocated into Level 1, Level 2, and Level 3, that was measured on a recurring basis (in thousands):

	June 30, 2014
	Level 1		Level 2		Level 3		Total
Financial Assets:
Money market funds	$	6,692	$	—	$	—	$	6,692
Corporate notes and commercial paper		—		191,158		—		191,158
U.S. government agency securities		—		67,068		—		67,068
Foreign currency forward contracts		—		121		—		121
Total financial assets	$	6,692	$	258,347	$	—	$	265,039

	December 31, 2013
	Level 1		Level 2		Level 3		Total
Financial Assets:
Money market funds	$	57,296	$	—	$	—	$	57,296
Corporate notes and commercial paper		—		182,472		—		182,472
U.S. government agency securities		—		75,289		—		75,289
Foreign currency forward contracts		—		372		—		372
Total financial assets	$	57,296	$	258,133	$	—	$	315,429