Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
REVENUES
REVENUES	$ 114,764	$ 143,496	$ 340,739	$ 313,594
OPERATING EXPENSES:
Patent administration and licensing	46,720	56,150	134,232	133,694
Development	21,789	22,546	56,487	66,999
Selling, general and administrative	14,418	20,978	34,818	46,994
Restructuring activities	0	7,045	3,280	20,290
Total Operating expenses	82,927	106,719	228,817	267,977
Income from operations	31,837	36,777	111,922	45,617
INTEREST EXPENSE	(7,659)	(5,773)	(19,446)	(19,429)
OTHER INCOME (EXPENSE), NET	912	(1,537)	(15,109)	2,226
Income before income taxes	25,090	29,467	77,367	28,414
INCOME TAX PROVISION	(3,323)	(4,253)	(17,312)	(6,039)
NET INCOME	21,767	25,214	60,055	22,375
Net loss attributable to noncontrolling interest	(455)	(1,014)	(1,230)	(11,042)
NET INCOME ATTRIBUTABLE TO INTERDIGITAL, INC.	$ 22,222	$ 26,228	$ 61,285	$ 33,417
NET INCOME PER COMMON SHARE — BASIC (in USD per share)	$ 0.75	$ 0.85	$ 2.03	$ 1.09
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC (in shares)	29,659	30,737	30,255	30,792
NET INCOME PER COMMON SHARE — DILUTED (in USD per share)	$ 0.74	$ 0.83	$ 2.00	$ 1.07
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED (in shares)	29,940	31,431	30,638	31,272