Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 81,652	$ 103,520
Unrealized (loss) gain on investments, net of tax	(495)	579
Comprehensive income	81,157	104,099
Comprehensive loss attributable to noncontrolling interest	0	(1,739)
Total comprehensive income attributable to InterDigital, Inc.	$ 81,157	$ 105,838