Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities:
Net income (loss)	$ (18,076)	$ 9,624
Adjustments to reconcile net income to net cash provided by operating activities:
Income from equity method investees	(3,335)	(1,441)
Stock-based compensation expense	1,597	1,683
Depreciation and amortization	11,904	12,177
Impairment of marketable securities	22,740	0
Deferred income tax provision (benefit)	(6,713)	204
Gain on sales of marketable securities	(1,963)	(5,067)
Loss on financial instrument obligations	283	669
Loss on change to equity method at fair value	2,807	568
Other	350	285
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	12,769	(4,293)
Prepaid expenses and other assets	(4,325)	(3,334)
Accounts payable and other liabilities	2,384	5,330
Net cash provided by operating activities	20,422	16,405
Cash Flows From Investing Activities:
Purchases of businesses, net of cash acquired	0	(517)
Purchases of property and equipment	(2,820)	(10,897)
Proceeds from sale of property and equipment	27	357
Investments in equity method investees	0	(144)
Purchases of marketable securities	(14,943)	(73,658)
Sales of marketable securities	16,686	95,740
Maturities of marketable securities	0	4,300
Proceeds from issuance of financial instrument obligations	133	0
Repayments of financial instrument obligations	(342)	0
Other investments	0	(3,000)
Reclassification of restricted cash	(74)	(20,010)
Net cash used in investing activities	(1,333)	(7,829)
Cash Flows From Financing Activities:
Repurchases of common stock - treasury shares	(268)	(5,681)
Repayment of subordinated notes	0	(346)
Repayments of capital lease obligations	(216)	(186)
Repayments of long-term debt	(6,607)	(6,607)
Other financing activities	0	60
Net cash used in financing activities	(7,091)	(12,760)
Net increase (decrease) in cash and cash equivalents	11,998	(4,184)
Effect of foreign currency translation on cash and cash equivalents	(1)	14
Cash and cash equivalents, beginning balance	51,910	73,602
Cash and cash equivalents, ending balance	$ 63,907	$ 69,432