Condensed Consolidated Statements of Income (Unaudited) Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Patent licensing royalties	$ 116,622	$ 192,088	$ 225,595	$ 246,362
Technology solutions	1,929	2,146	3,334	5,716
REVENUES	118,551	194,234	228,929	252,078
OPERATING EXPENSES:
Patent administration and licensing	31,212	31,272	62,837	64,966
Development	18,326	22,901	36,317	38,788
Selling, general and administrative	10,435	11,689	19,953	19,993
Total Operating Expenses	59,973	65,862	119,107	123,747
Income from operations	58,578	128,372	109,822	128,331
OTHER INCOME:
Interest and investment income, net	(7,746)	(3,602)	(12,982)	(7,566)
Income before income taxes	50,832	124,770	96,840	120,765
INCOME TAX PROVISION	(18,877)	(46,658)	(36,553)	(45,208)
NET INCOME	32,602	78,901	61,667	77,040
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	31,955	78,112	60,287	75,557
Net Income (Loss) Attributable to Noncontrolling Interest	$ (647)	$ (789)	$ (1,380)	$ (1,483)
NET INCOME PER COMMON SHARE — BASIC	$ 0.91	$ 1.95	$ 1.69	$ 1.90
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC	36,022	40,443	36,486	40,444
NET INCOME PER COMMON SHARE — DILUTED	$ 0.89	$ 1.93	$ 1.67	$ 1.90
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED	36,442	40,822	36,883	40,643
CASH DIVIDEND DECLARED PER COMMON SHARE	$ 0.20	$ 0.20	$ 0.40	$ 0.30