Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income (loss)	$ (24,005)	$ 919
Non-cash elements included in net income (loss):
Depreciation, depletion and amortization	81,475	81,116
Unrealized loss on investments	3,060	2,750
Loss (gain) on disposition of properties, plants, equipment, and mineral interests	175	(49)
Provision for reclamation and closure costs	11,028	3,646
Stock compensation	4,036	3,826
Deferred income taxes	(1,781)	(5,859)
Amortization of loan origination fees	1,365	1,703
Loss on derivative contracts	9,561	6,458
Foreign exchange gain	(17,566)	(5,932)
Other non-cash items, net	45	(914)
Change in assets and liabilities, net of business acquisitions:
Accounts receivable	(2,951)	10,952
Inventories	4,382	7,125
Other current and non-current assets	(6,779)	(1,097)
Accounts payable and accrued liabilities	3,986	(4,446)
Accrued payroll and related benefits	2,221	10,205
Accrued taxes	2,782	(1,541)
Accrued reclamation and closure costs and other non-current liabilities	7,934	(50,094)
Cash provided by operating activities	78,968	58,768
Investing activities:
Additions to properties, plants, equipment and mineral interests	(95,399)	(90,697)
Acquisition of Revett, net of cash acquired	(809)
Proceeds from disposition of properties, plants, equipment and mineral interests	277	447
Purchases of investments	(947)	(580)
Changes in restricted cash and investment balances		4,334
Net cash used in investing activities	(96,878)	(86,496)
Financing activities:
Proceeds from exercise of warrants		54,418
Acquisition of treasury shares	(1,875)	(3,740)
Dividends paid to common shareholders	(2,796)	(2,629)
Dividends paid to preferred shareholders	(414)	(414)
Credit facility and debt issuance fees paid	(123)	(705)
Payments on debt	(216)
Payments on capital leases	(7,833)	(6,893)
Net cash provided by (used in) financing activities	(13,257)	40,037
Effect of exchange rates on cash	(4,044)	(2,124)
Net increase (decrease) in cash and cash equivalents	(35,211)	10,185
Cash and cash equivalents at beginning of period	209,665	212,175
Cash and cash equivalents at end of period	174,454	222,360
Significant non-cash investing and financing activities:
Addition of capital lease obligations	4,346	3,450
Common stock issued for the acquisition of Revett	19,133
Payment of accrued compensation in restricted stock units	$ 3,016	4,600
Senior Notes contributed to pension plan, par value		$ 6,500