CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities:
Net cash used in operating activities	$ (14,114)	$ (14,086)
Cash Flows from Investing Activities:
Proceeds from sales of and distributions from companies	73,854	25,029
Acquisitions of ownership interests in companies	(34,841)	(52,181)
Advances and loans to companies	(17,741)	(10,935)
Repayment of advances and loans to companies	1,741	1,290
Increase in marketable securities	(18,733)	(23,875)
Decrease in marketable securities	35,386	28,043
Capital expenditures	(73)	(402)
Net cash provided by (used in) investing activities	39,593	(33,031)
Cash Flows from Financing Activities:
Issuance of Company common stock, net	5	676
Tax withholdings related to equity-based awards	(437)	0
Repurchase of Company common stock	(5,389)	(1,748)
Net cash used in financing activities	(5,821)	(1,072)
Net change in cash and cash equivalents	19,658	(48,189)
Cash and cash equivalents at beginning of period	32,838	111,897
Cash and cash equivalents at end of period	$ 52,496	$ 63,708