Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES:
Net income	$ 9,059	$ 5,455
Reconciliation of net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	19,050	21,218
Amortization of loan acquisition cost	895	354
Gain on sale of investments	(22,385)	0
Gain on sale of assets	15	0
Non-cash employee compensation	2,579	1,341
Deferred income tax expense	12,531	3,307
Fair value of derivatives loss	162	4,249
Fair value (gain)/loss on convertible debt	892	(18,185)
Accretion of asset retirement obligations	703	933
Reclamation expenditures	(2,575)	(3,883)
Reconciliation, Total	20,926	14,789
Changes in non-cash working capital:
Accounts receivable	(1,969)	(1,025)
Inventories	(2,012)	(406)
Deposits	(1,305)	(945)
Accounts payable and accrued liabilities	3,018	(16,614)
Other	(774)	(1,664)
Net cash provided by/(used in) operating activities	17,884	(5,865)
INVESTING ACTIVITIES:
Expenditures on mining properties	(12,537)	(8,840)
Expenditures on property, plant and equipment	(12,128)	(9,912)
Change in accounts payable and deposits on mine equipment and material	(3,696)	893
Cash used for equity investments	(938)	0
Other	6,605	0
Net cash used in investing activities	(22,694)	(17,859)
FINANCING ACTIVITIES:
Principal payments on debt	(2,150)	(2,765)
Proceeds from debt agreements and equipment financing	7,036	0
Other	91	132
Net cash provided by/(used in) financing activities	4,977	(2,633)
Increase/(decrease) in cash and cash equivalents	167	(26,357)
Cash and cash equivalents, beginning of period	103,644	178,018
Cash and cash equivalents end of period	$ 103,811	$ 151,661