CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net cash used in operating activities	$ (11,245)	$ (12,778)
Cash Flows from Investing Activities:
Proceeds from sales of and distributions from companies	11,379	81,203
Acquisitions of ownership interests in companies	(40,545)	(25,406)
Advances and loans to companies	(10,935)	(7,618)
Repayment of advances and loans to companies	55	4,097
Increase in marketable securities	(16,763)	(23,874)
Decrease in marketable securities	16,676	34,444
Capital expenditures	(244)	(11)
Other	0	5
Net cash provided by (used in) investing activities	(40,377)	62,840
Cash Flows from Financing Activities:
Issuance of Company common stock, net	549	573
Repayments of Convertible Debt	0	(441)
Repurchase of Company common stock	0	(25,036)
Net cash provided by (used in) financing activities	549	(24,904)
Net change in cash and cash equivalents	(51,073)	25,158
Cash and cash equivalents at beginning of period	111,897	139,318
Cash and cash equivalents at end of period	$ 60,824	$ 164,476