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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash Flows from Operating Activities:    
Net cash used in operating activities $ (18,649) $ (15,515)
Cash Flows from Investing Activities:    
Proceeds from sales of and distributions from companies 69,912 16,604
Acquisitions of ownership interests in companies (3,250) (11,851)
Advances and loans to companies (12,098) (16,933)
Repayment of advances and loans to companies 10,652 0
Purchases of marketable securities (24,858) 0
Proceeds, from sales and maturities in marketable securities 4,211 10,268
Proceeds from sales of property and equipment 1 0
Net cash provided by (used in) investing activities 44,570 (1,912)
Cash Flows from Financing Activities:    
Proceeds from credit facility 35,000 50,000
Issuance costs of credit facility (2,252) (5,696)
Repurchase of convertible senior debentures (41,000) (14,455)
Issuance of Company common stock, net 0 12
Tax withholdings related to equity-based awards (234) (175)
Net cash provided by (used in) financing activities (8,486) 29,686
Net change in cash, cash equivalents and restricted cash equivalents 17,435 12,259
Cash, cash equivalents and restricted cash equivalents at beginning of period 27,087 28,394
Cash, cash equivalents and restricted cash equivalents at end of period $ 44,522 $ 40,653