CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Interest revenue	$ 2,337	$ 17,744	$ 30,404
Revenues	198,110	320,060	244,301
Cost of Revenue	48,460	30,537	4,065
Cost, Amortization	15,831	24,689	12,028
Operating expenses
General and administrative	45,420	45,641	39,790
Selling and marketing	17,139	17,683	538
Research and development	2,955	7,381	3,820
Impairment of Intangible Assets, Finite-lived	152,330	0	0
Change in fair value of anniversary payment and contingent consideration	(41,631)	349	(3,716)
Asset Impairment Charges	8,200	0	3,735
Acquisition-related costs	0	0	3,564
Loss on extinguishment of notes receivable	0	0	51,075
Total operating expenses	248,704	126,280	114,899
Operating income	(50,594)	193,780	129,402
Non-operating expense, net
Interest and other income, net	6,065	1,659	588
Interest expense	(12,157)	(20,221)	(18,267)
Business Combination, Bargain Purchase, Gain Recognized, Amount	0	9,309	0
Gain (Loss) on Investments	764	0	0
Gain (loss) on extinguishment of debt	0	0	(2,353)
Total non-operating expense, net	(5,328)	(9,253)	(20,032)
Income before income taxes	(55,922)	184,527	109,370
Income tax expense	12,937	73,826	45,711
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(68,859)	110,701	63,659
Net Income (Loss) Attributable to Noncontrolling Interest	0	(47)	53
Net income attributable to noncontrolling interests	$ (68,859)	$ 110,748	$ 63,606
Net income per share
Basic (in Dollars per Share)	$ (0.47)	$ 0.71	$ 0.39
Diluted (in Dollars per Share)	$ (0.47)	$ 0.71	$ 0.39
Weighted average shares outstanding
Basic (in Shares)	145,669	155,394	163,805
Diluted (in Shares)	145,669	156,257	164,192
Cash dividends declared per common share (in Dollars per Share)	$ 0.00	$ 0.00	$ 0.10
Queen et al. patents [Member]
Revenues
Revenues	$ 4,536	$ 36,415	$ 166,158
Acquired rights [Member]
Revenues
Revenues	85,256	162,327	16,196
Product Revenue [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	105,448	84,123	31,669
License and other [Member]
Revenues
Revenues	$ 533	$ 19,451	$ (126)