Goodwill and Acquired Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 10,381	$ 9,648	$ 20,815	$ 19,247
Future amortization expense to be recognized in remainder of 2020	21,100		21,100
Future amortization expense 2021	43,000		43,000
Future amortization expense 2022	37,300		37,300
Future amortization expense 2023	28,900		28,900
Future amortization expense 2024	$ 20,500		$ 20,500