XML 66 R44.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 4 - Environmental and Reclamation Activities (Details) (USD $) | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Oct. 31, 2013 | Oct. 31, 2012 | Oct. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Apr. 30, 2012 | Sep. 08, 2011 | Dec. 31, 2010
Note 4 - Environmental and Reclamation Activities (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Accrued Liabilities |  |  |  |  |  |  |  | $ 264,400,000 |
Payments for Legal Settlements |  |  |  | 15,000,000 | 25,000,000 | 168,000,000 |  |  |
Liabilities Subject to Compromise, Provision for Expected and Allowed Claims |  |  |  |  |  | 36,100,000 | 73,900,000 |  |
Surety Bond Maintenance Fees | 300,000 | 400,000 | 600,000 |  |  |  |  |  |
Accrued Reclamation And Closure Costs Total | 105,200,000 | 113,200,000 |  | 105,191,000 | 113,215,000 | 153,811,000 |  |  | 318,797,000
Increase Decrease In Accrued Reclamation |  |  |  |  | (4,400,000) |  |  |  |
Remaining Payment Obligation |  |  |  |  | 32,900,000 |  |  |  |
Surety Bonds |  |  |  | 30,000,000 |  |  |  |  |
Series One And Three Warrants [Member] |  |  |  |  |  |  |  |  |
Note 4 - Environmental and Reclamation Activities (Details) [Line Items] |  |  |  |  |  |  |  |  |
Liabilities Subject to Compromise, Provision for Expected and Allowed Claims |  |  |  | 55,500,000 |  |  |  |  |
Undiscounted Costs [Member] |  |  |  |  |  |  |  |  |
Note 4 - Environmental and Reclamation Activities (Details) [Line Items] |  |  |  |  |  |  |  |  |
Liabilities Subject to Compromise, Provision for Expected and Allowed Claims |  |  |  |  |  | $ 53,400,000 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |
Note 4 - Environmental and Reclamation Activities (Details) [Line Items] |  |  |  |  |  |  |  |  |
Investment Warrants, Exercise Price (in Dollars per share) |  |  |  | $ 2.40 |  |  |  |  |
Risk Free Interest Rate | 6.00% |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |
Note 4 - Environmental and Reclamation Activities (Details) [Line Items] |  |  |  |  |  |  |  |  |
Investment Warrants, Exercise Price (in Dollars per share) |  |  |  | $ 2.51 |  |  |  |  |
Risk Free Interest Rate | 8.00% |  |  |  |  |  |  |  |

X
- Definition Accrued reclamation and closure costs total. + References No definition available. + Details
Name: | hl_AccruedReclamationAndClosureCostsTotal
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Increase decrease in accrued reclamation. + References No definition available. + Details
Name: | hl_IncreaseDecreaseInAccruedReclamation
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | hl_Note4EnvironmentalandReclamationActivitiesDetailsLineItems
Namespace Prefix: | hl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining payment obligation. + References No definition available. + Details
Name: | hl_RemainingPaymentObligation
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Risk free interest rate. + References No definition available. + Details
Name: | hl_RiskFreeInterestRate
Namespace Prefix: | hl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Surety bond maintenance fees + References No definition available. + Details
Name: | hl_SuretyBondMaintenanceFees
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Surety bonds. + References No definition available. + Details
Name: | hl_SuretyBonds
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Exercise price of the warrants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
Name: | invest_InvestmentWarrantsExercisePrice
Namespace Prefix: | invest_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the provision for expected and allowed claims included in liabilities subject to compromise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=29642632&loc=d3e56145-112766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6916575&loc=d3e55717-112764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765 + Details
Name: | us-gaap_LiabilitiesSubjectToCompromiseProvisionForExpectedAndAllowedClaims
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
Name: | us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration