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UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (104,707) $ (46,593)
Adjustments to reconcile net loss to net cash used in operating activities:    
Asset impairment 7,521 4,123
Depreciation and amortization expense 29,825 38,235
Bad debt expense 12,409 14,042
Compensation expense related to share-based awards 2,361 3,406
Loss on sale of businesses, net 311 6,934
Loss on disposition of property and equipment 32 103
Changes in operating assets and liabilities (29,037) (87,225)
Net cash used in operating activities (81,285) (66,975)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available-for-sale investments (121,590) (34,570)
Sales of available-for-sale investments 28,726 34,485
Purchases of property and equipment (7,031) (10,005)
Payment of cash upon sale of business (250) (2,525)
Other (11) 9
Net cash used in investing activities (100,156) (12,606)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Issuance of common stock 392 565
Payment on borrowings   (80,000)
Change in restricted cash 636 85,912
Payments of capital lease obligations   (210)
Net cash provided by financing activities 1,028 6,267
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: 78 (1,381)
NET DECREASE IN CASH AND CASH EQUIVALENTS (180,335) (74,695)
DISCONTINUED OPERATIONS CASH ACTIVITY INCLUDED ABOVE:    
Add: Cash balance of discontinued operations, beginning of the period 472 128,207
Less: Cash balance of discontinued operations, end of the period 0 102,195
CASH AND CASH EQUIVALENTS, beginning of the period 318,471 112,415
CASH AND CASH EQUIVALENTS, end of the period $ 138,608 $ 63,732