Goodwill and Acquired Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill [Table Text Block]

A summary of acquired intangible assets and goodwill activity for the three months ended March 31, 2020 is presented below:

(in thousands)	Acquired Intangible Assets			Goodwill			Total Intangible Assets
Balance as of December 31, 2019	$	141,847		$	743,823		$	885,670
Decreases:
Acquisition	—			(474		)	(474		)
Amortization	(5,726		)	—			(5,726		)
Other (primarily changes in foreign currency exchange rates)	(5,944		)	(28,850		)	(34,794		)
Balance as of March 31, 2020	$	130,177		$	714,499		$	844,676