Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 69,557	$ (14,219)	$ 63,660	$ (64,185)
Adjustments:
Amortization	27,763	35,497	93,232	107,560
Accretion	2,184	3,629	8,201	10,305
Deferred income taxes	(49,463)	(1,233)	(66,738)	(8,470)
Loss on extinguishment of debt	10,040	0	10,040	524
Fair value adjustments, net	961	(5,786)	13,235	(3,657)
Stock-based compensation	2,312	1,639	7,534	6,393
Impairment of equity securities	0	483	20	2,028
Write-downs	0	0	4,446	0
Foreign exchange and other	(5,236)	8,541	(4,763)	13,321
Changes in operating assets and liabilities:
Receivables	19,672	11,011	10,751	11,225
Prepaid expenses and other current assets	(2,816)	(2,055)	(2,435)	(3,222)
Inventories	(8,900)	5,380	(24,408)	10,713
Accounts payable and accrued liabilities	(18,262)	(6,117)	(12,407)	(12,210)
CASH PROVIDED BY OPERATING ACTIVITIES	47,812	36,770	100,368	70,325
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(25,627)	(23,861)	(71,087)	(65,158)
Acquisitions, net of cash acquired	(1,427)	(122)	(1,427)	(111,290)
Proceeds from Sale of Property, Plant, and Equipment	4,802	333	16,104	498
Purchase of short term investments and equity securities	(21)	(3)	(120)	(1,876)
Sales and maturities of short-term investments	5,432	60	7,077	529
Other	(1,299)	7	(4,218)	(1,836)
CASH USED IN INVESTING ACTIVITIES	(18,140)	(23,586)	(53,671)	(179,133)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Unsecured Debt	0	0	0	153,500
Payments on long-term debt, capital leases, and associated costs	(107,868)	(2,618)	(120,551)	(77,838)
Gold production royalty payments	7,563	10,159	27,155	30,281
Other	1,051	(34)	323	(529)
CASH PROVIDED BY FINANCING ACTIVITIES	(64,867)	(12,811)	(24,799)	44,852
Effect of exchange rate changes on cash and cash equivalents	121	(533)	(95)	(1,197)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(35,074)	(160)	21,803	(65,153)
Cash and cash equivalents at beginning of period	257,591	205,868	200,714	270,861
Cash and cash equivalents at end of period	222,517	205,708	222,517	205,708
Proceeds from Issuance of Common Stock	$ 49,513	$ 0	$ 122,584	$ 0