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Note 11. Business Segments and Significant Customers (Tables)

12 Months Ended

Dec. 31, 2011

Schedule Of Sales Contributed By Each Segment Table Text Block

	Year Ended December 31,
	2011			2010			2009
Greens Creek		71.8	%		74.8	%		73.4	%
Lucky Friday		28.2	%		25.2	%		26.6	%
		100	%		100	%		100	%

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	2011			2010			2009
Net sales from continuing operations to unaffiliated customers:
Greens Creek	$	342,906		$	313,318		$	229,318
Lucky Friday		134,728			105,495			83,230
	$	477,634		$	418,813		$	312,548
Income (loss) from operations:
Greens Creek	$	181,116		$	138,973		$	79,329
Lucky Friday		75,608			48,639			27,146
Other		(59,079	)		(239,167	)		(31,203	)
	$	197,645		$	(51,555	)	$	75,272
Capital additions (including non-cash additions):
Greens Creek	$	41,657		$	18,280		$	17,520
Lucky Friday		60,454			54,370			15,990
Other		35,274			2,089			30
	$	137,385		$	74,739		$	33,540

Depreciation, depletion and amortization from continuing operations:
Greens Creek	$	41,013	$	51,671	$	52,909
Lucky Friday		6,053		8,340		9,928
	$	47,066	$	60,011	$	62,837
Other significant non-cash items from continuing operations:
Greens Creek	$	2,326	$	17,829	$	2,974
Lucky Friday		14		5,053		22
Other		31,470		57,651		(6,687	)
	$	33,810	$	80,533	$	(3,691	)
Identifiable assets:
Greens Creek	$	729,289	$	740,573	$	771,433
Lucky Friday		213,285		170,928		116,797
Other		453,516		470,992		158,554
	$	1,396,090	$	1,382,493	$	1,046,784

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	2011		2010		2009
United States	$	24,409	$	24,708	$	19,127
Canada		240,569		124,862		136,248
Mexico		—		16,258		20,413
Japan		60,963		62,740		43,356
Korea		92,919		94,114		77,492
China		51,635		73,257		15,912
Belgium		—		25,907		—
Total, excluding gains/losses on forward contracts	$	470,495	$	421,846	$	312,548

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

	2011		2010
United States	$	923,040	$	833,186
Canada		99		10
Mexico		73		92
	$	923,212	$	833,288

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Year Ended December 31,
	2011			2010			2009
Teck Metals Ltd.		51.1	%		29.6	%		43.6	%
Korea Zinc		18.4	%		20.7	%		23.4	%
Trafigura AG		12.4	%		17.4	%		—

- Definition

Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries.

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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