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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 211,053	$ 92,061	$ 42,188
Unrealized gain (loss) on investments, net of tax	269	(345)	(387)
Comprehensive income	211,322	91,716	41,801
Comprehensive loss attributable to noncontrolling interest	(3,016)	(1,632)	(13,107)
Total comprehensive income attributable to InterDigital, Inc.	$ 214,338	$ 93,348	$ 54,908

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