Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (367,183)	$ (1,186,874)	$ (650,563)
Adjustments:
Amortization	143,751	162,436	229,564
Accretion	14,149	16,246	20,810
Deferred income taxes	(40,838)	(448,905)	(177,178)
Loss on termination of revolving credit facility	0	3,035	0
Gain on extinguishment of senior notes	(16,187)	0	0
Fair value adjustments, net	(5,202)	(3,618)	(80,399)
Litigation settlement	0	0	22,046
Stock-based compensation	9,272	9,288	4,812
Gain (Loss) on Disposition of Assets	0	0	9,801
Impairment of equity securities	2,346	6,593	18,308
Write-downs	313,337	1,472,721	772,993
Foreign exchange and other	16,574	124	(244)
Changes in operating assets and liabilities:
Receivables	17,560	(11,611)	663
Prepaid expenses and other current assets	(3,063)	5,635	(15,165)
Inventories	19,573	12,971	4,031
Accounts payable and accrued liabilities	9,453	15,507	(25,910)
CASH PROVIDED BY OPERATING ACTIVITIES	113,542	53,548	113,967
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(95,193)	(64,244)	(100,813)
Acquisitions, net of cash acquired	(110,846)	(21,329)	(116,898)
Other	(3,979)	8	4,478
Purchase of short term investments and equity securities	(1,880)	(50,513)	(8,052)
Sales and maturities of short-term investments	605	54,344	34,796
CASH USED IN INVESTING ACTIVITIES	(211,293)	(81,734)	(186,489)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of notes and bank borrowings	153,500	167,784	300,000
Payments on long-term debt, capital leases, and associated costs	(84,715)	(25,902)	(60,628)
Gold production royalty payments	39,235	48,395	57,034
Payments for Repurchase of Common Stock	0	0	(27,552)
Other	(542)	(509)	(514)
CASH PROVIDED BY FINANCING ACTIVITIES	29,008	92,978	154,272
Effect of exchange rate changes on cash and cash equivalents	(1,404)	(621)	(500)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(70,147)	64,171	81,250
Cash and cash equivalents at beginning of period	270,861	206,690	125,440
Cash and cash equivalents at end of period	$ 200,714	$ 270,861	$ 206,690