UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (58,143)	$ (15,203)
Adjustments to reconcile net loss to net cash used in operating activities:
Asset impairment	67	157
Depreciation and amortization expense	15,431	19,295
Bad debt expense	5,852	6,702
Compensation expense related to share-based awards	1,341	1,775
Loss on sale of business		6,712
Loss on disposition of property and equipment	26	94
Changes in operating assets and liabilities	6	(33,729)
Net cash used in operating activities	(35,420)	(14,197)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(29,810)	(13,540)
Sales of available-for-sale investments	14,320	13,465
Purchases of property and equipment	(3,468)	(4,077)
Payments of cash upon sale of business		(1,947)
Other		(1)
Net cash used in investing activities	(18,958)	(6,100)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	196	304
Payment on borrowings		(80,000)
Change in restricted cash	(384)	86,470
Payments of capital lease obligations		(74)
Net cash (used in) provided by financing activities	(188)	6,700
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS:	10	(3,194)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(54,556)	(16,791)
DISCONTINUED OPERATIONS CASH ACTIVITY INCLUDED ABOVE:
Add: Cash balance of discontinued operations, beginning of the period	182	127,925
Less: Cash balance of discontinued operations, end of the period	199	114,428
CASH AND CASH EQUIVALENTS, beginning of the period	318,761	112,697
CASH AND CASH EQUIVALENTS, end of the period	$ 264,188	$ 109,403