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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 43,636 $ 329,093
Adjustments to reconcile net income to net cash flows provided by operating activities:    
Depreciation and amortization 37,752 36,517
Provision for doubtful accounts 1,313 880
Amortization of debt discount and debt issuance costs 72 6,657
Stock-based compensation 3,381 2,898
Unrealized loss on interest rate derivative contracts   5,675
Income from discontinued operations, net of tax   (5,166)
Gain on disposition of long-lived assets   (1,076)
Gain on sale of discontinued operations   (305,197)
Changes in operating assets and liabilities, excluding the effects of acquisitions:    
Accounts receivable (7,830) (3,832)
Materials and supplies, prepayments, and other current assets (1,921) (3,470)
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities 1,444 11,623
Accrued taxes (18,401) (23,668)
Other (3,785) 7,828
Net cash provided by operating activities of continuing operations 55,661 58,762
Net cash provided by (used in) operating activities of discontinued operations (4,612) 25,751
Net cash provided by operating activities 51,049 84,513
CASH FLOWS FROM INVESTING ACTIVITIES:    
Capital expenditures, net (41,699) (55,171)
Proceeds from disposition of long-lived assets 1,371 1,500
Decrease in restricted cash 38,707  
Net cash used in investing activities of continuing operations (1,621) (53,671)
Net cash provided by investing activities of discontinued operations   711,541
Net cash provided by (used in) investing activities (1,621) 657,870
Cash flows from financing activities:    
Dividends paid on common stock (12,873) (7,839)
Distribution to non-controlling interests (7,932) (3,321)
Payment of debt issuance costs   (12)
Principal repayments of term loan   (272,137)
Proceeds from stock option exercises 610 1,450
Purchases of common stock (1,355) (1,288)
Repurchase of non-controlling interests (59)  
Investments made by minority shareholders in consolidated affiliates   135
Net cash used in financing activities of continuing operations (21,609) (283,012)
Net cash used in financing activities of discontinued operations, net   (1,678)
Net cash used in financing activities (21,609) (284,690)
NET CHANGE IN CASH AND CASH EQUIVALENTS 27,819 457,693
CASH AND CASH EQUIVALENTS, beginning of the period 356,607 136,647
CASH AND CASH EQUIVALENTS, end of the period $ 384,426 $ 594,340