Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (10,955)	$ 14,497	$ 7,708	$ (5,899)
Adjustments:
Amortization	32,946	37,505	73,050	65,470
Accretion	2,593	2,848	5,107	6,017
Deferred income taxes	(4,844)	(15,170)	(3,469)	(17,275)
Loss on Extinguishment of Debt	9,342	0	9,342	0
Fair value adjustments, net	(336)	3,579	864	12,274
Stock-based compensation	2,235	2,307	5,542	5,222
Gain on sale of the Joaquin project	0	0	(21,138)	0
Write-downs	0	0	0	4,446
Foreign exchange and other	(3,624)	1,930	(5,822)	494
Changes in operating assets and liabilities:
Receivables	(1,916)	(12,402)	11,190	(8,921)
Prepaid expenses and other current assets	3,612	(898)	(687)	381
Inventories	(997)	(7,686)	13,295	(15,508)
Accounts payable and accrued liabilities	1,223	19,429	(10,432)	5,855
CASH PROVIDED BY OPERATING ACTIVITIES	29,279	45,939	84,550	52,556
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(37,482)	(23,288)	(61,461)	(45,460)
Proceeds from the sale of assets	436	7,293	15,455	11,302
Purchase of short term investments and equity securities	(8,948)	(92)	(9,964)	(99)
Sales and maturities of short-term investments	898	648	10,918	1,645
Other	(61)	(1,446)	(1,607)	(2,919)
CASH USED IN INVESTING ACTIVITIES	(45,157)	(16,885)	(46,659)	(35,531)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Common Stock	0	73,071	0	73,071
Proceeds from Issuance of Unsecured Debt	244,958	0	244,958	0
Payments on long-term debt, capital leases, and associated costs	(188,931)	(6,712)	(192,157)	(12,683)
Gold production royalty payments	0	(10,461)	0	(19,592)
Other	(473)	(448)	(3,720)	(728)
Net Cash Provided by (Used in) Financing Activities	55,554	55,450	49,081	40,068
Effect of exchange rate changes on cash and cash equivalents	329	(302)	884	(216)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	40,005	84,202	87,856	56,877
Cash and cash equivalents at beginning of period	210,033	173,389	162,182	200,714
Cash and cash equivalents at end of period	$ 250,038	$ 257,591	$ 250,038	$ 257,591