Goodwill and Acquired Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 10,340	$ 9,624	$ 31,155	$ 28,871
Future amortization expense to be recognized in remainder of 2020	10,500		10,500
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