Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
REVENUES	$ 104,498	$ 75,609	$ 180,708	$ 144,240
OPERATING EXPENSES:
Patent administration and licensing	38,695	37,353	78,803	73,424
Development	22,092	17,027	40,910	35,522
Selling, general and administrative	11,794	12,314	24,397	26,529
TOTAL OPERATING EXPENSES	72,581	66,694	144,110	135,475
Income from operations	31,917	8,915	36,598	8,765
INTEREST EXPENSE	(9,971)	(9,907)	(20,516)	(19,385)
OTHER INCOME, NET	3,789	12,354	9,812	15,969
Income before income taxes	25,735	11,362	25,894	5,349
INCOME TAX PROVISION	(5,144)	(4,984)	(6,964)	(3,185)
NET INCOME	20,591	6,378	18,930	2,164
Net loss attributable to noncontrolling interest	(1,660)	(1,365)	(3,437)	(2,776)
NET INCOME ATTRIBUTABLE TO INTERDIGITAL, INC.	$ 22,251	$ 7,743	$ 22,367	$ 4,940
NET INCOME PER COMMON SHARE — BASIC (in USD per share)	$ 0.72	$ 0.25	$ 0.73	$ 0.15
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC (in shares)	30,757	31,547	30,740	32,076
NET INCOME PER COMMON SHARE — DILUTED (in USD per share)	$ 0.72	$ 0.24	$ 0.72	$ 0.15
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED (in shares)	31,045	31,776	30,982	32,366
Patent licensing royalties
REVENUES	$ 101,184	$ 73,567	$ 174,182	$ 139,945
Technology solutions
REVENUES	3,314	2,042	6,526	4,070
Patent sales
REVENUES	$ 0	$ 0	$ 0	$ 225