Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ (650,563)	$ 48,677	$ 93,499
Add (deduct) non-cash items
Depreciation, depletion and amortization	232,879	218,857	224,500
Accretion of discount on debt and other assets, net	2,548	3,431	4,041
Accretion of royalty obligation	14,947	18,294	21,550
Deferred income taxes	(177,178)	16,163	51,792
Loss on debt extinguishments	0	1,036	5,526
Fair value adjustments, net	(80,399)	18,421	46,450
Gain (loss) on foreign currency transactions	(880)	(1,381)	380
Proceeds From Settlement	22,046	0	0
Share-based compensation	4,812	8,010	8,122
(Gain) loss on Disposition of Assets	(9,801)	1,101	(1,145)
Impairment of marketable securities	18,308	605	0
Writedowns	772,993	5,825	0
Other non-cash charges	136	(326)	(335)
Changes in operating assets and liabilities:
Receivables and other current assets	663	9,756	(21,950)
Prepaid expenses and other	(15,165)	2,489	(8,839)
Inventories	4,031	(48,305)	(30,408)
Accounts payable and accrued liabilities	(25,910)	(31,019)	22,990
CASH PROVIDED BY OPERATING ACTIVITIES	113,467	271,634	416,173
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of short term investments and marketable securities	(8,052)	(12,959)	(49,501)
Proceeds from sales and maturities of short term investments	34,796	21,695	6,246
Acquisitions	(116,898)	(29,297)	0
Capital expenditures	(100,813)	(115,641)	(119,988)
Other	4,478	3,087	2,282
CASH USED IN INVESTING ACTIVITIES	(186,489)	(133,115)	(160,961)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of notes and bank borrowings	300,000	0	27,500
Payments on long-term debt, capital leases, and associated costs	(60,628)	(97,170)	(85,519)
Payments on gold production royalty	(57,034)	(74,734)	(73,191)
Payments on gold lease facility	0	0	(13,800)
Additions to restricted assets associated with the Kensington Term Facility	0	4,645	(1,326)
Payments for Repurchase of Common Stock	(27,552)	(19,971)	0
Other	(514)	(861)	18
CASH USED IN FINANCING ACTIVITIES:	154,272	(188,091)	(146,318)
INCREASE IN CASH AND CASH EQUIVALENTS	81,250	(49,572)	108,894
Cash and cash equivalents at beginning of period	125,440	175,012	66,118
Cash and cash equivalents at end of period	$ 206,690	$ 125,440	$ 175,012