Goodwill and Acquired Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 442,326	$ 399,191
Accumulated Amortization	(262,895)	(230,843)
Net Carrying Amount	179,431	168,348
Completed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	153,722	145,091
Accumulated Amortization	(94,088)	(81,587)
Net Carrying Amount	59,634	63,504
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	279,684	245,710
Accumulated Amortization	(163,155)	(144,786)
Net Carrying Amount	116,529	100,924
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	830	700
Accumulated Amortization	(529)	(306)
Net Carrying Amount	301	394
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,600	7,200
Accumulated Amortization	(4,633)	(3,674)
Net Carrying Amount	2,967	3,526
Acquired license rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	490	490
Accumulated Amortization	(490)	(490)
Net Carrying Amount	$ 0	$ 0