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Note 8 - Employee Benefit Plans (Detail) - Fair Value By Asset Category (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Hecla [Member] | Interest-bearing Deposits [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | $ 683 | $ 609
Hecla [Member] | Interest-bearing Deposits [Member] |  |
Assets at fair value |  | 609
Hecla [Member] | Common Stock [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 2,309 | 2,071
Hecla [Member] | Common Stock [Member] |  |
Assets at fair value |  | 2,071
Hecla [Member] | Real Estate Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 9,611 | 6,497
Hecla [Member] | Real Estate Investments [Member] |  |
Assets at fair value |  | 6,497
Hecla [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets at fair value | 10,095 | 12,641
Hecla [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 7,251 | 6,803
Hecla [Member] | Common Collective Funds [Member] |  |
Assets at fair value |  | 19,444
Hecla [Member] | Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 24,183 | 22,667
Hecla [Member] | Mutual Funds [Member] |  |
Assets at fair value |  | 22,667
Hecla [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 27,175 | 25,347
Hecla [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets at fair value | 10,095 | 12,641
Hecla [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 16,862 | 13,300
Hecla [Member] |  |
Assets at fair value |  | 51,288
Lucky Friday [Member] | Interest-bearing Deposits [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 198 | 166
Lucky Friday [Member] | Interest-bearing Deposits [Member] |  |
Assets at fair value | 198 | 166
Lucky Friday [Member] | Common Stock [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 588 | 527
Lucky Friday [Member] | Common Stock [Member] |  |
Assets at fair value | 588 | 527
Lucky Friday [Member] | Real Estate Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 2,513 | 1,709
Lucky Friday [Member] | Real Estate Investments [Member] |  |
Assets at fair value | 2,513 | 1,709
Lucky Friday [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets at fair value | 2,469 | 3,310
Lucky Friday [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 1,978 | 1,857
Lucky Friday [Member] | Common Collective Funds [Member] |  |
Assets at fair value | 4,447 | 5,167
Lucky Friday [Member] | Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 6,637 | 6,225
Lucky Friday [Member] | Mutual Funds [Member] |  |
Assets at fair value | 6,637 | 6,225
Lucky Friday [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets at fair value | 7,423 | 6,918
Lucky Friday [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets at fair value | 2,469 | 3,310
Lucky Friday [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets at fair value | 4,491 | 3,566
Lucky Friday [Member] |  |
Assets at fair value | 14,383 | 13,794
Interest-bearing Deposits [Member] | Hecla [Member] |  |
Assets at fair value | 683 |
Common Stock [Member] | Hecla [Member] |  |
Assets at fair value | 2,309 |
Real Estate Investments [Member] | Hecla [Member] |  |
Assets at fair value | 9,611 |
Common Collective Funds [Member] | Hecla [Member] |  |
Assets at fair value | 17,346 |
Mutual Funds [Member] | Hecla [Member] |  |
Assets at fair value | 24,183 |
Hecla [Member] |  |
Assets at fair value | $ 54,132 |

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant