Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:
Net income (loss)	$ 919	$ (22,222)
Non-cash elements included in net income (loss):
Depreciation, depletion and amortization	81,116	55,279
Gain on sale of investments		(197)
Unrealized loss (gain) on investments	2,750	(327)
Gain on disposition of properties, plants, equipment, and mineral interests	(49)	(125)
Provision for reclamation and closure costs	3,646	1,701
Stock compensation	3,826	3,253
Deferred income taxes	(5,859)	(1,304)
Amortization of loan origination fees	1,703	905
(Gain) loss on derivative contracts	6,458	(15,589)
Foreign exchange gain	(5,932)	(711)
Other non-cash items, net	(914)	442
Change in assets and liabilities:
Accounts receivable	10,952	(14,711)
Inventories	7,125	(1,923)
Other current and non-current assets	(1,097)	(793)
Accounts payable and accrued liabilities	(4,446)	8,574
Accrued payroll and related benefits	10,205	(281)
Accrued taxes	(1,541)	(10,458)
Accrued reclamation and closure costs and other non-current liabilities	(50,094)	3,565
Cash provided by operating activities	58,768	5,080
Investing activities:
Additions to properties, plants, equipment and mineral interests	(90,697)	(112,806)
Acquisition of Aurizon, net of cash acquired		(321,117)
Proceeds from sale of investments		1,772
Proceeds from disposition of properties, plants and equipment	447	126
Purchases of investments	(580)	(5,738)
Changes in restricted cash and investment balances	4,334	(36)
Net cash used in investing activities	(86,496)	(437,799)
Financing activities:
Proceeds from exercise of warrants	54,418
Acquisition of treasury shares	(3,740)	(286)
Dividends paid to common shareholders	(2,629)	(5,134)
Dividends paid to preferred shareholders	(414)	(414)
Debt issuance and loan origination fees	(705)	(1,244)
Borrowings on debt		490,000
Repayments of capital leases	(6,893)	(5,171)
Net cash provided by (used in) financing activities	40,037	477,751
Effect of exchange rates on cash	(2,124)	1,820
Net increase (decrease) in cash and cash equivalents	10,185	46,852
Cash and cash equivalents at beginning of period	212,175	190,984
Cash and cash equivalents at end of period	222,360	237,836
Significant non-cash investing and financing activities:
Addition of capital lease obligations	3,450	7,674
Stock issued for the acquisition of Aurizon		218,302
Increase in asset retirement obligations	8,210
Payment of accrued compensation in restricted stock units	4,600
Senior Notes contributed to pension plan, par value	$ 6,500