Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities:
Net income (loss)	$ (97,783)	$ (23,763)	$ 7,327
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (income) from discontinued operations	0	(506)	5,540
Stock-based compensation expense	3,157	2,807	2,040
Depreciation and amortization	23,613	24,156	19,185
Impairment of goodwill and intangible assets	25,622	36,666	0
Impairment of marketable securities	59,781	0	0
Deferred income tax provision (benefit)	(6,547)	(198)	1,988
Gain on sales of marketable securities	(5,247)	(3,765)	(2,608)
Reversal of tax reserves	110	(45)	(7,236)
Loss from equity-method investees	16,102	6,070	862
Loss on financial instrument obligations	477	1,820	0
Loss on change to equity method at fair value	2,807	568	0
Gain (loss) on non-monetary exchange	(9,268)	0	0
Other	1,019	1,116	935
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	17,364	(2,488)	2,653
Prepaid expenses and other assets	225	1,782	(833)
Accounts payable and other liabilities	(4,908)	(305)	(2,044)
Net cash used in operating activities of discontinued operations	0	0	(2,116)
Net cash provided by operating activities	26,524	43,915	25,693
Cash Flows From Investing Activities:
Purchases of businesses, net of cash acquired	0	(517)	(61,888)
Purchases of property and equipment	(4,785)	(15,939)	(8,932)
Proceeds from sale of property and equipment	171	632	552
Other investments	0	(3,000)	(25,000)
Investments in equity method investees	0	(144)	(9,202)
Purchases of marketable securities	(43,426)	(111,648)	(189,268)
Sales of marketable securities	43,338	116,314	75,825
Maturities of marketable securities	0	4,302	145,994
Proceeds from issuance of financial instrument obligations	490	385	0
Repayments of financial instrument obligations	(639)	(381)	0
Reclassification of restricted cash	(328)	(21,311)	0
Net cash used in investing activities	(5,179)	(31,307)	(71,919)
Cash Flows From Financing Activities:
Repurchases of common stock - treasury shares	(4,612)	(10,354)	(29,384)
Repurchases of common stock - reverse/forward stock split	0	(10,070)	0
Proceeds from issuance of long-term debt	0	0	95,000
Payments for debt issuance costs	0	0	(1,368)
Repayments of long-term debt	(36,339)	(13,215)	(15,500)
Other financing activities	(589)	(681)	(413)
Net cash provided by (used in) financing activities	(41,540)	(34,320)	48,335
Net increase (decrease) in cash and cash equivalents	(20,195)	(21,712)	2,109
Effect of foreign currency translation on cash and cash equivalents	(8)	20	(63)
Cash and cash equivalents at beginning of period	51,910	73,602	71,556
Cash and cash equivalents at end of period	$ 31,707	$ 51,910	$ 73,602