XML 62 R44.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Note 8 - Derivative Instruments - Summary of Forward Sales Contracts (Details) oz in Thousands, lb in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 lb oz $ / lb $ / oz | Dec. 31, 2021 lb oz $ / lb $ / oz
Silver 2022 Settlements for Provisional Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 2,235 | 1,814
Underlying, Derivative Mass | $ / oz | 19.54 | 23.02
Gold 2022 Settlements for Provisional Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 1,840 | 6
Underlying, Derivative Mass | $ / oz | 1,760 | 1,812
Zinc 2022 Settlements for Provisional Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 18,739 | 13,371
Underlying, Derivative Mass | $ / lb | 1.3 | 1.39
Lead 2022 Settlements for Provisional Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 14,991 | 4,575
Underlying, Derivative Mass | $ / lb | 0.96 | 0.96
Silver 2022 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 2,235 | 0
Gold 2022 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 1,840 | 0
Zinc 2022 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 8,763 | 57,706
Underlying, Derivative Mass | $ / lb | 1.32 | 1.28
Lead 2022 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 1,984 | 59,194
Underlying, Derivative Mass | $ / lb | 0.97 | 0.98
Silver 2023 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 | 0
Gold 2023 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 | 0
Zinc 2023 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 71,209 | 76,280
Underlying, Derivative Mass | $ / lb | 1.3 | 1.29
Lead 2023 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 75,618 | 71,650
Underlying, Derivative Mass | $ / lb | 1 | 1
Silver 2024 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 |
Gold 2024 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 |
Zinc 2024 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 78,760 |
Underlying, Derivative Mass | $ / lb | 1.34 |
Lead 2024 Settlements for Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 31,526 |
Underlying, Derivative Mass | $ / lb | 1 |
Silver 2025 Settlements For Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 |
Gold 2025 Settlements For Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 0 |
Zinc 2025 Settlements For Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 2,480 |
Underlying, Derivative Mass | $ / lb | 1.33 |
Lead 2025 Settlements For Forecasted Sales [Member] |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 0 |

X
- Definition Nominal mass used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountMass
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in mass but not the derivative contract itself. + References No definition available. + Details
Name: | us-gaap_UnderlyingDerivativeMass
Namespace Prefix: | us-gaap_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Silver2022SettlementsForProvisionalSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Gold2022SettlementsForProvisionalSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Zinc2022SettlementsForProvisionalSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Lead2022SettlementsForProvisionalSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Silver2022SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Gold2022SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Zinc2022SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Lead2022SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Silver2023SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Gold2023SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Zinc2023SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Lead2023SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Silver2024SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Gold2024SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Zinc2024SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Lead2024SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Silver2025SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Gold2025SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Zinc2025SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=hl_Lead2025SettlementsForForecastedSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |