CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 14,526	$ 24,722
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	29,223	24,910
Provision for doubtful accounts	237	256
Amortization of debt discount and debt issuance costs	283	48
Stock-based compensation	2,677	2,379
Income from discontinued operations, net of tax	(390)
Gain on disposition of long-lived assets	(2,823)
Loss on deconsolidation of subsidiary	19,937
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable, net	4,033	(7,174)
Materials and supplies, prepayments, and other current assets	(4,275)	(3,336)
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	4,440	(641)
Accrued taxes	18,553	(23,952)
Other	(5,879)	(1,905)
Net cash provided by (used in) operating activities of continuing operations	80,542	15,307
Net cash provided by operating activities of discontinued operations	603	(3,255)
Net cash provided by operating activities	81,145	12,052
Cash flows from investing activities:
Capital expenditures	(28,031)	(25,104)
Acquisition of business, net of acquired cash of $6,571	(11,968)
Change in restricted cash	39,001	19,206
Proceeds from disposition of long-lived assets	5,873	1,371
Net cash used in investing activities of continuing operations	4,875	(4,527)
Net cash provided by (used in) investing activities	4,875	(4,527)
Cash flows from financing activities:
Dividends paid on common stock	(9,267)	(8,574)
Distribution to minority stockholders	(9,160)	(6,081)
Payment of debt issuance costs	(30)
Proceeds from stock option exercises	1,686	610
Principal repayments of term loan	(2,997)
Purchase of common stock	(1,568)	(1,283)
Investments made by minority shareholders in consolidated affiliates	905
Net cash used in financing activities of continuing operations	(20,431)	(15,328)
Net cash used in financing activities	(20,431)	(15,328)
Net change in cash and cash equivalents	65,589	(7,803)
Cash and cash equivalents, beginning of period	326,216	356,607
Cash and cash equivalents, end of period	$ 391,805	$ 348,804