Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 14,497	$ (16,677)	$ (5,899)	$ (49,965)
Adjustments:
Amortization	37,505	38,974	65,470	72,064
Accretion	2,848	3,526	6,017	6,676
Deferred income taxes	(15,170)	(5,053)	(17,275)	(7,237)
Fair value adjustments, net	3,579	(2,754)	12,274	2,130
Stock-based compensation	2,307	2,604	5,222	4,754
Impairment of equity securities	20	31	20	1,545
Write-downs	0	0	4,446	0
Foreign exchange and other	1,910	4,224	474	5,303
Changes in operating assets and liabilities:
Receivables	(12,402)	(2,342)	(8,921)	214
Prepaid expenses and other current assets	(898)	160	381	(1,167)
Inventories	(7,686)	4,649	(15,508)	5,333
Accounts payable and accrued liabilities	19,429	9,662	5,855	(6,095)
CASH PROVIDED BY OPERATING ACTIVITIES	45,939	37,004	52,556	33,555
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(23,288)	(23,677)	(45,460)	(41,297)
Acquisitions, net of cash acquired	0	(9,152)	0	(111,170)
Proceeds from Sale of Property, Plant, and Equipment	7,293	8	11,302	165
Other	(1,446)	(111)	(2,919)	(1,841)
Purchase of short term investments and equity securities	(92)	(1,597)	(99)	(1,873)
Sales and maturities of short-term investments	648	399	1,645	469
CASH USED IN INVESTING ACTIVITIES	(16,885)	(34,130)	(35,531)	(155,547)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Unsecured Debt	0	100,000	0	153,500
Payments on long-term debt, capital leases, and associated costs	(6,712)	(66,626)	(12,683)	(75,220)
Gold production royalty payments	10,461	9,754	19,592	20,122
Other	(448)	(72)	(728)	(495)
CASH PROVIDED BY FINANCING ACTIVITIES	55,450	23,548	40,068	57,663
Effect of exchange rate changes on cash and cash equivalents	(302)	(141)	(216)	(664)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	84,202	26,281	56,877	(64,993)
Cash and cash equivalents at beginning of period	173,389	179,587	200,714	270,861
Cash and cash equivalents at end of period	257,591	205,868	257,591	205,868
Proceeds from Issuance of Common Stock	$ 73,071	$ 0	$ 73,071	$ 0