Goodwill and Acquired Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 538,899	$ 442,326
Accumulated Amortization	(304,175)	(262,895)
Net Carrying Amount	234,724	179,431
Completed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	172,346	153,722
Accumulated Amortization	(111,435)	(94,088)
Net Carrying Amount	60,911	59,634
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	358,032	279,684
Accumulated Amortization	(186,733)	(163,155)
Net Carrying Amount	171,299	116,529
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	373	830
Accumulated Amortization	(77)	(529)
Net Carrying Amount	296	301
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,658	7,600
Accumulated Amortization	(5,440)	(4,633)
Net Carrying Amount	2,218	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