Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis

The fair values of the Company’s assets and liabilities, including cash equivalents, marketable securities, restricted investments, derivatives, and contingent considerations are measured at fair value on a recurring basis, and are determined under the fair value categories as follows (in thousands):

			Quoted Price in		Significant Other		Significant
			Active Market		Observable Inputs		Unobservable
	Total		(Level 1)		(Level 2)		Inputs (Level 3)
December 31, 2016:
Cash Equivalents:
Money market funds	$	72,866	$	72,866	$	—	$	—
Corporate notes		4,551		—		4,551		—
Commercial paper		21,471		—		21,471		—
Securities of government-sponsored entities		5,995		—		5,995		—
Total cash equivalents	$	104,883	$	72,866	$	32,017	$	—

December 31, 2015:
Cash Equivalents, Marketable Securities:
Money market funds	$	68,425	$	68,425	$	—	$	—
Certificates of deposit		19,007		19,007		—		—
Corporate notes		152,319		—		152,319		—
Commercial paper		21,991		—		21,991		—
Securities of government-sponsored entities		115,929		—		115,929		—
Total cash equivalents and marketable securities	$	377,671	$	87,432	$	290,239	$	—

Schedule of Fair Value of Liabilities Measured on Recurring Basis Using Unobservable Inputs

The following table sets forth the changes in the estimated fair value of the Company’s liabilities measured on a recurring basis using significant unobservable inputs (Level 3) (in thousands):


	2016			2015
Fair value measurement at January 1	$	—		$	644
Contingent consideration liability recorded upon acquisition		61,242			431
Change in fair value measurement		7,265			—
Changes resulting from foreign currency fluctuations		126			(36	)
Contingent consideration paid or settled		(1,132	)		(1,039	)
Fair value measurement at December 31	$	67,501		$	—