Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net loss	$ (2,758)	$ (13,764)
Non-cash elements included in net loss:
Depreciation, depletion and amortization	54,045	34,834
Gain on sale of investments		(197)
(Gain) loss on disposition of properties, plants, equipment, and mineral interests	44	(125)
Provision for reclamation and closure costs	2,710	1,190
Stock compensation	2,561	1,870
Deferred income taxes	(6,840)	(1,610)
Amortization of loan origination fees	1,135	397
(Gain) loss on derivative contracts	6,231	(21,528)
Foreign exchange gain	(55)
Other non-cash charges, net	(986)	(25)
Change in assets and liabilities, net of amounts acquired in business combination:
Accounts receivable	8,398	9,117
Inventories	(2,418)	3,601
Other current and non-current assets	1,617	4,254
Accounts payable and accrued liabilities	(17,084)	5,790
Accrued payroll and related benefits	9,069	(1,577)
Accrued taxes	2,582	(7,518)
Accrued reclamation and closure costs and other non-current liabilities	(1,222)	(4,436)
Cash provided by operating activities	57,029	10,275
Investing activities:
Additions to properties, plants, equipment and mineral interests	(57,461)	(60,291)
Acqusition of Aurizon, net of cash acquired		(321,117)
Proceeds from sale of investments		1,771
Proceeds from disposition of properties, plants and equipment	238	126
Purchases of investments		(5,738)
Changes in restricted cash and investment balances	4,334	55
Net cash used in investing activities	(52,889)	(385,194)
Financing activities:
Proceeds from exercise of warrants	14,112
Acquisition of treasury shares	(1,501)	(286)
Dividends paid to common shareholders	(1,715)	(4,277)
Dividends paid to preferred shareholders	(276)	(276)
Credit availability and debt issuance fees paid	(577)	(1,426)
Borrowings on debt		490,000
Repayments of capital leases	(4,525)	(3,425)
Net cash provided by financing activities	5,518	480,310
Effect of exchange rates on cash	250
Net increase in cash and cash equivalents	9,908	105,391
Cash and cash equivalents at beginning of period	212,175	190,984
Cash and cash equivalents at end of period	222,083	296,375
Significant non-cash investing and financing activities:
Addition of capital lease obligations	2,193	6,725
Increase in asset retirement obligations	8,210
Stock issued for the acquisition of Aurizon		218,302
Senior notes contributed to pension plan, par value	5,000
Payment of accrued compensation in restricted stock units	$ 4,600