Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 22,973	$ 38,611	$ 26,948	$ 51,075
Add (deduct) non-cash items
Depreciation, depletion and amortization	61,024	57,641	113,616	107,682
Accretion of discount on debt and other assets, net	808	494	1,605	944
Accretion of royalty obligation	5,492	5,770	10,072	11,037
Deferred income taxes	9,690	4,223	17,368	10,093
Loss on debt extinguishments	0	389	0	856
Fair value adjustments, net	(17,759)	13,933	4,018	20,593
Gain (loss) on foreign currency transactions	70	(848)	369	(737)
Share-based compensation	1,033	(3,351)	3,170	4,804
(Gain) loss on Disposition of Assets	264	(1,223)	264	(1,224)
Loss on impairment	4,813	0	4,813	0
Other non-cash charges	(40)	200	(40)	831
Changes in operating assets and liabilities:
Receivables and other current assets	10,319	(8,138)	7,365	(12,979)
Prepaid expenses and other	(2,857)	1,354	1,916	1,335
Inventories	3,097	(23,575)	(21,625)	(36,068)
Accounts payable and accrued liabilities	14,276	25,585	(39,655)	(11,392)
CASH PROVIDED BY OPERATING ACTIVITIES	113,203	111,065	130,204	146,850
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of short term investments and marketable securities	(6,831)	(11,881)	(7,866)	(13,110)
Proceeds from sales and maturities of short term investments	683	2,773	20,701	3,360
Capital expenditures	(32,238)	(25,764)	(63,885)	(41,681)
Other	995	325	1,180	273
CASH USED IN INVESTING ACTIVITIES	(37,391)	(34,547)	(49,870)	(51,158)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of notes and bank borrowings	0	0	0	27,500
Payments on long-term debt, capital leases, and associated costs	(8,794)	(16,704)	(14,244)	(34,099)
Payments on gold production royalty	(19,287)	(17,441)	(40,660)	(32,059)
Payments on gold lease facility	0	0	0	(13,800)
Additions to restricted assets associated with the Kensington Term Facility	0	0	0	(1,325)
Other	(217)	30	(1,045)	(1,197)
CASH USED IN FINANCING ACTIVITIES:	(28,298)	(34,115)	(55,949)	(54,980)
INCREASE IN CASH AND CASH EQUIVALENTS	47,514	42,403	24,385	40,712
Cash and cash equivalents at beginning of period	151,883	64,427	175,012	66,118
Cash and cash equivalents at end of period	$ 199,397	$ 106,830	$ 199,397	$ 106,830