Goodwill and Acquired Intangible Assets - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 478,677	$ 442,326
Accumulated Amortization	(273,191)	(262,895)
Net Carrying Amount	205,486	179,431
Completed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	153,972	153,722
Accumulated Amortization	(98,349)	(94,088)
Net Carrying Amount	55,623	59,634
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	315,837	279,684
Accumulated Amortization	(168,943)	(163,155)
Net Carrying Amount	146,894	116,529
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	823	830
Accumulated Amortization	(594)	(529)
Net Carrying Amount	229	301
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,555	7,600
Accumulated Amortization	(4,815)	(4,633)
Net Carrying Amount	2,740	2,967
Acquired license rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	490	490
Accumulated Amortization	(490)	(490)
Net Carrying Amount	$ 0	$ 0