Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss		$ (4,849)	$ (99,749)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	[1],[2]	101,788	106,781
Accretion of asset retirement obligation and receivable		21,534	21,251
Share-based compensation		5,925	5,588
Non-cash interest expense		6,879	4,617
Amortization of deferred financing costs		8,324	7,849
Loss on derivative instruments		2,164	6,717
Loss (gain) on foreign exchange		1,531	(2,474)
Income from equity affiliates		(4,127)	(4,141)
Distributions from equity affiliates		5,177	4,328
Deferred income tax expense (benefit)		(48,490)	14,887
Other		(4,359)	3,968
Changes in operating assets and liabilities:
Receivables		(238)	(14,327)
Inventories		9,460	494
Accounts payable and accrued expenses		(2,327)	(2,572)
Interest payable		(3,720)	7,398
Deferred revenue		4,314	(8,297)
Other assets and liabilities		7,375	(21,528)
Asset retirement obligation		(22,120)	(9,908)
Net cash provided by operating activities		84,241	20,882
Cash flows from investing activities:
Additions to property, plant and equipment		(30,619)	(57,971)
Change in restricted investments		270	(7,988)
Cash received from restricted deposits		0	34,000
Cash payments related to acquisitions and other		(125,315)	(35,887)
Cash acquired related to acquisition, net		0	2,780
Proceeds from sales of assets		6,176	1,691
Receipts from loan and lease receivables		4,852	20,192
Payments related to loan and lease receivables		(2,141)	(3,981)
Other		(587)	(287)
Net cash used in investing activities		(147,364)	(47,451)
Cash flows from financing activities:
Borrowings from long-term debt, net of debt discount		122,250	199,363
Repayments of long-term debt		(43,876)	(138,185)
Borrowings on revolving lines of credit		313,900	142,823
Repayments of revolving lines of credit		(315,900)	(152,412)
Debt issuance costs and other refinancing costs		(7,246)	(7,431)
Other		(798)	90
Net cash provided by financing activities		68,330	44,248
Effect of exchange rate changes on cash		771	(2,601)
Net increase in cash and cash equivalents		5,978	15,078
Cash and cash equivalents, beginning of period		22,936	14,258
Cash and cash equivalents, end of period		28,914	29,336
Supplemental disclosures of cash flow information:
Cash paid for interest		79,099	61,399
Non-cash transactions:
Accrued purchases of property and equipment		4,166	2,718
Capital leases and other financing sources		$ 19,830	$ 14,967

[1] Deferred tax assets of $14.5 million as of September 30, 2015 were reclassified into liabilities on adoption of ASU 2015-17 - Income Taxes: Balance Sheet Classification of Deferred Taxes.

[2] Unamortized debt issuance costs of $26.8 million as of September 30, 2015 were reclassified from other non-current assets into long-term debt on adoption of ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.