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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (90,839) $ (152,675)
Adjustments to reconcile net loss to net cash used in operating activities:    
Asset impairment 50,837 22,006
Depreciation and amortization expense 19,861 42,966
Bad debt expense 15,526 19,107
Compensation expense related to share-based awards 2,453 3,311
Loss on sale of businesses, net 1,632 311
(Gain) loss on disposition of property and equipment (10) 32
Changes in operating assets and liabilities (20,463) (36,203)
Net cash used in operating activities (21,003) (101,145)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available-for-sale investments (64,056) (131,487)
Sales of available-for-sale investments 69,436 51,540
Purchases of property and equipment (7,926) (10,558)
Proceeds on the sale of assets 2,272  
Payments of cash upon sale of businesses (4,125) (387)
Net cash used in investing activities (4,399) (90,892)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Issuance of common stock 1,082 575
Payment on borrowings (10,000)  
Change in restricted cash 9,250 (674)
Net cash provided by (used in) financing activities 332 (99)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: 178 121
NET DECREASE IN CASH AND CASH EQUIVALENTS (24,892) (192,015)
DISCONTINUED OPERATIONS CASH ACTIVITY INCLUDED ABOVE:    
Add: Cash balance of discontinued operations, beginning of the period   475
CASH AND CASH EQUIVALENTS, beginning of the period 93,832 318,468
CASH AND CASH EQUIVALENTS, end of the period $ 68,940 $ 126,928