Condensed Consolidated Statements of Cash Flows Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net Loss, Including Portion Attributable to Noncontrolling Interest	$ (12,775)	$ (37,686)
Adjustments to reconcile net loss including noncontrolling interests in operating subsidiaries to net cash used in operating activities:
Depreciation and amortization	26,386	30,166
Non-cash stock compensation	6,424	10,068
Other	(127)	0
Changes in assets and liabilities:
Restricted cash	(10,718)	0
Accounts receivable	(17,382)	(18,844)
Prepaid expenses and other assets	(791)	1,724
Accounts payable and accrued expenses	(3,292)	5,736
Royalties and contingent legal fees payable	5,830	9,865
Deferred income tax	0	(1,668)
Net cash used in operating activities	(6,445)	(639)
Cash flows from investing activities:
Purchases of property and equipment	(8)	(97)
Purchase of available-for-sale investments	(23,296)	(33,359)
Maturities and sale of available-for-sale investments	44,845	88,741
Investments in patents/ patent rights	(18,667)	(22,096)
Net cash provided by investing activities	2,874	33,189
Cash flows from financing activities:
Distributions to noncontrolling interests in operating subsidiary	0	867
Payments of Dividends	(12,749)	(12,513)
Proceeds from exercises of stock options	938	185
Net cash used in financing activities	(11,811)	(13,195)
Increase (decrease) in cash and cash equivalents	(15,382)	19,355
Cash and cash equivalents, beginning	134,466	126,685
Cash and cash equivalents, ending	119,084
Patent acquisition costs included in accrued expenses	$ 0	$ 3,000