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Note 5 - Income Taxes (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 5 - Income Taxes (Details) [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance | $ 32,094,000 us-gaap_DeferredTaxAssetsValuationAllowance | $ 27,155,000 us-gaap_DeferredTaxAssetsValuationAllowance | $ 23,030,000 us-gaap_DeferredTaxAssetsValuationAllowance | $ 22,895,000 us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Liabilities, Net | 42,000,000 us-gaap_DeferredTaxLiabilities | 51,000,000 us-gaap_DeferredTaxLiabilities |  |
Foreign Earnings Repatriated | 0 us-gaap_ForeignEarningsRepatriated | 0 us-gaap_ForeignEarningsRepatriated | 0 us-gaap_ForeignEarningsRepatriated |
Operating Loss Carryforwards Expiration Period | 20 years |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 14,698,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax | 22,155,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax |  |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation | 20,000,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | 20,000,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation |  |
Unrecognized Tax Benefits | 0 us-gaap_UnrecognizedTaxBenefits | 0 us-gaap_UnrecognizedTaxBenefits |  |
Domestic Tax Authority [Member] |  |  |  |
Note 5 - Income Taxes (Details) [Line Items] |  |  |  |
Operating Loss Carryforwards | 218,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |  |
State and Local Jurisdiction [Member] |  |  |  |
Note 5 - Income Taxes (Details) [Line Items] |  |  |  |
Operating Loss Carryforwards | 87,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |
Foreign Tax Authority [Member] |  |  |  |
Note 5 - Income Taxes (Details) [Line Items] |  |  |  |
Operating Loss Carryforwards | 87,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |  |
Provincial [Member] |  |  |  |
Note 5 - Income Taxes (Details) [Line Items] |  |  |  |
Operating Loss Carryforwards | $ 12,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = hl_ProvincialMember |  |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Alternative Minimum Tax -URI http://asc.fasb.org/extlink&oid=6504908 + Details
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