Goodwill and Acquired Intangible Assets - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 478,279	$ 442,326
Accumulated Amortization	(293,801)	(262,895)
Net Carrying Amount	184,478	179,431
Completed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	154,343	153,722
Accumulated Amortization	(106,730)	(94,088)
Net Carrying Amount	47,613	59,634
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	315,087	279,684
Accumulated Amortization	(180,658)	(163,155)
Net Carrying Amount	134,429	116,529
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	816	830
Accumulated Amortization	(721)	(529)
Net Carrying Amount	95	301
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,543	7,600
Accumulated Amortization	(5,202)	(4,633)
Net Carrying Amount	2,341	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