Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value of Assets and Liabilities Measured on Recurring Basis

The following tables provide the assets and liabilities carried at fair value and measured on a recurring basis:



				Fair Value Measurements at Reporting Date Using:
(in thousands)	December 31, 2015			Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	356,924		$	356,924	$	—	$	—
Short-term investments	$	446		$	—	$	446	$	—
Liabilities
Contingent consideration	$	(1,376	)	$	—	$	—	$	(1,376	)



				Fair Value Measurements at Reporting Date Using:
(in thousands)	December 31, 2014			Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	281,333		$	281,333	$	—	$	—
Short-term investments	$	714		$	—	$	714	$	—
Liabilities
Contingent consideration	$	(2,621	)	$	—	$	—	$	(2,621	)

Changes in Level 3 Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs

The following table presents the changes during the years ended December 31, 2015 and 2014 in the Company's Level 3 liabilities for contingent consideration and deferred compensation that are measured at fair value on a recurring basis:



	Fair Value Measurement Using Significant Unobservable Inputs
(in thousands)	Contingent Consideration			Deferred Compensation
Balance as of January 1, 2014	$	7,389		$	704
Contingent payments	(4,866		)	(712		)
Interest expense and foreign exchange activity included in earnings	98			8
Balance as of December 31, 2014	$	2,621		$	—
Contingent payments	(1,456		)	—
Interest expense and foreign exchange activity included in earnings	211			—
Balance as of December 31, 2015	$	1,376		$	—