CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 329,093	$ 38,717
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	36,517	38,304
Provision for doubtful accounts	880	1,006
Amortization of debt discount and debt issuance costs	6,657	2,068
Stock-based compensation	3,419	2,585
Unrealized loss on interest rate derivative contracts	5,675
Deferred income taxes		136
Income from discontinued operations	(5,166)	(23,428)
Gain on disposition of long-lived assets	(1,076)
Gain on sale of discontinued operations	(305,197)
Changes in operating assets and liabilities:
Accounts receivable	(3,832)	(5,944)
Materials and supplies, prepayments, and other current assets	(3,470)	(2,268)
Income tax receivable		11,545
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	11,623	(52)
Accrued taxes	(23,668)	17,181
Other	7,307	2,545
Net cash provided by operating activities of continuing operations	58,762	82,395
Net cash provided by operating activities of discontinued operations	25,751	55,080
Net cash provided by operating activities	84,513	137,475
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(55,171)	(28,575)
Proceeds from disposition of assets	1,500
Net cash used in investing activities of continuing operations	(53,671)	(28,575)
Net cash provided by (used in) investing activities of discontinued operations, net	711,541	(21,930)
Net cash provided by (used in) investing activities	657,870	(50,505)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowing under term loan		275,000
Proceeds from borrowings under revolver loan		46,378
Principal repayments of term loan	(272,137)	(256,873)
Principal repayments of revolver loan		(74,534)
Proceeds from stock option exercises	1,450	1,240
Dividends paid on common stock	(7,839)	(10,692)
Distributions to non-controlling interests	(3,321)	(1,294)
Payments of debt issuance costs	(12)	(3,564)
Repurchase of non-controlling interests		(80)
Investments made by non-controlling interests	135	1,040
Purchase of common stock	(1,288)	(202)
Net cash used in financing activities of continuing operations	(283,012)	(23,581)
Net cash used in financing activities of discontinued operations, net	(1,678)	(716)
Net cash used in financing activities	(284,690)	(24,297)
NET CHANGE IN CASH AND CASH EQUIVALENTS	457,693	62,673
CASH AND CASH EQUIVALENTS, beginning of the period	136,647	48,735
CASH AND CASH EQUIVALENTS, end of the period	594,340	111,408
Supplemental cash flow information:
Interest paid	6,642	10,096
Taxes paid, net of refunds	$ 37,597	$ 6,225