Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (16,652)	$ 69,557	$ (8,944)	$ 63,660
Adjustments:
Amortization	33,830	27,763	106,880	93,232
Accretion	2,691	2,184	7,798	8,201
Deferred income taxes	1,940	(49,463)	(1,529)	(66,738)
Loss on Extinguishment of Debt	0	10,040	9,342	10,040
Fair value adjustments, net	0	961	864	13,235
Stock-based compensation	2,585	2,312	8,127	7,534
Gain on sale of the Joaquin project	0	0	(21,138)	0
Write-downs	0	0	0	4,446
Foreign exchange and other	(3,157)	(5,236)	(8,979)	(4,743)
Changes in operating assets and liabilities:
Receivables	6,529	19,672	17,719	10,751
Prepaid expenses and other current assets	(3,195)	(2,816)	(3,882)	(2,435)
Inventories	(2,874)	(8,900)	10,421	(24,408)
Accounts payable and accrued liabilities	7,735	(18,262)	(2,697)	(12,407)
CASH PROVIDED BY OPERATING ACTIVITIES	29,432	47,812	113,982	100,368
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(29,461)	(25,627)	(90,922)	(71,087)
Payments to Acquire Businesses, Net of Cash Acquired	0	(1,427)		(1,427)
Proceeds from the sale of assets	1,083	4,802	16,538	16,104
Purchase of short term investments and equity securities	(3,595)	(21)	(13,559)	(120)
Sales and maturities of short-term investments	403	5,432	11,321	7,077
Other	(5,850)	(1,299)	(7,457)	(4,218)
CASH USED IN INVESTING ACTIVITIES	(37,420)	(18,140)	(84,079)	(53,671)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Common Stock	0	49,513	0	122,584
Proceeds from Issuance of Unsecured Debt	(2,257)	0	242,701	0
Payments on long-term debt, capital leases, and associated costs	(3,344)	(107,868)	(195,501)	(120,551)
Gold production royalty payments	0	(7,563)	0	(27,155)
Other	(6)	1,051	(3,726)	323
Net Cash Provided by (Used in) Financing Activities	(5,607)	(64,867)	43,474	(24,799)
Effect of exchange rate changes on cash and cash equivalents	(222)	121	662	(95)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(13,817)	(35,074)	74,039	21,803
Cash and cash equivalents at beginning of period	250,038	257,591	162,182	200,714
Cash and cash equivalents at end of period	$ 236,221	$ 222,517	$ 236,221	$ 222,517