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Other Intangible Assets, net and Goodwill - Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Nov. 06, 2020	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning Balance		$ 6,042,964	$ 1,328,045
Acquisition		(8,121)	(4,501,894)
Impact of foreign currency fluctuations and other		1,672	222,154
Goodwill, Ending Balance		6,036,515	6,042,964
CPA Global
Goodwill [Line Items]
Decrease to goodwill, purchase accounting adjustments		8,121
Discontinued Operations, Disposed of by Sale | Brand Protection, AntiPiracy, and AntiFraud Solutions
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit			(9,129)
Discontinued Operations, Disposed of by Sale | Techstreet Business
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit	$ (9,129)
Science Segment
Goodwill [Line Items]
Goodwill, Beginning Balance		1,409,743	909,937
Acquisition		0	(499,199)
Goodwill, Written off Related to Sale of Business Unit			0
Impact of foreign currency fluctuations and other		(118)	607
Goodwill, Ending Balance		1,409,625	1,409,743
Intellectual Property Segment (As Restated)
Goodwill [Line Items]
Goodwill, Beginning Balance		4,633,221	418,108
Acquisition		(8,121)	(4,002,695)
Goodwill, Written off Related to Sale of Business Unit			(9,129)
Impact of foreign currency fluctuations and other		1,790	221,547
Goodwill, Ending Balance		$ 4,626,890	$ 4,633,221

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