CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES:
Net (loss)/income	$ (8,236)	$ 9,059
Reconciliation of net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	20,157	19,050
Amortization of loan acquisition cost	0	895
Gain on sale of assets	(72)	(22,370)
Non-cash employee compensation	1,694	2,579
Deferred income tax expense	(1,153)	12,531
Fair value of derivatives loss	0	162
Fair value (gain)/loss on convertible debt	(7,646)	892
Accretion of asset retirement obligations	634	703
Reclamation expenditures	(883)	(2,575)
Changes in working capital	(2,315)	(3,042)
Net cash provided by operating activities	2,180	17,884
INVESTING ACTIVITIES:
Expenditures on mining properties	(14,106)	(12,537)
Expenditures on property, plant and equipment	(3,553)	(12,128)
Change in accounts payable and deposits on mine equipment and material	(730)	(3,696)
Cash used for equity investments	0	(938)
Proceeds from sale of investments	72	6,605
Net cash used in investing activities	(18,317)	(22,694)
FINANCING ACTIVITIES:
Principal payments on debt	(1,879)	(2,150)
Proceeds from debt agreements and equipment financing	0	7,036
Other	152	91
Net cash used in financing activities	(1,727)	4,977
Decrease/(increase) in cash and cash equivalents	(17,864)	167
Cash and cash equivalents, beginning of period	78,884	78,884
Cash and cash equivalents, end of period	$ 61,020	$ 103,811