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Note 11 - Business Segments and Significant Customers (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Sales Contributed By Each Segment Table Text Block

	Year Ended December 31,
	2012			2011			2010
Greens Creek		100.0	%		71.8	%		74.8	%
Lucky Friday		—			28.2	%		25.2	%
		100	%		100	%		100	%

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

	2012			2011			2010
Net sales to unaffiliated customers:
Greens Creek	$	320,895		$	342,906		$	313,318
Lucky Friday		248			134,728			105,495
	$	321,143		$	477,634		$	418,813
Income (loss) from operations:
Greens Creek	$	138,245		$	181,116		$	138,973
Lucky Friday		(25,179	)		75,608			48,639
Other		(75,200	)		(59,079	)		(239,167	)
	$	37,866		$	197,645		$	(51,555	)
Capital additions (including non-cash additions):
Greens Creek	$	62,184		$	41,657		$	18,280
Lucky Friday		55,998			60,454			54,370
Other		11,760			35,274			2,089
	$	129,942		$	137,385		$	74,739

Depreciation, depletion and amortization:
Greens Creek	$	43,522	$	41,013	$	51,671
Lucky Friday		—		6,053		8,340
	$	43,522	$	47,066	$	60,011
Other significant non-cash items:
Greens Creek	$	4,037	$	2,326	$	17,829
Lucky Friday		92		14		5,053
Other		33,922		31,470		57,651
	$	38,051	$	33,810	$	80,533
Identifiable assets:
Greens Creek	$	741,666	$	729,289	$	740,573
Lucky Friday		226,196		213,285		170,928
Other		410,428		453,516		470,992
	$	1,378,290	$	1,396,090	$	1,382,493

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

	2012		2011		2010
United States	$	25,438	$	24,409	$	24,708
Canada		34,441		240,569		124,862
Mexico		—		—		16,258
Japan		70,371		60,963		62,740
Korea		120,106		92,919		94,114
China		72,133		51,635		73,257
Belgium		—		—		25,907
Total, excluding gains/losses on forward contracts	$	322,489	$	470,495	$	421,846

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

	2012		2011
United States	$	996,405	$	923,040
Canada		198		99
Mexico		56		73
	$	996,659	$	923,212

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

	Year Ended December 31,
	2012			2011			2010
Teck Metals Ltd.		10.7	%		51.1	%		29.6	%
Korea Zinc		37.2	%		18.4	%		20.7	%
Trafigura AG		22.4	%		12.4	%		17.4	%
MS Zinc		12.3	%		6.9	%		7.0	%

- 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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