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Note 16: Commitments, Contingencies, and Obligations (Details Textual) - USD ($) $ in Thousands |  | 1 Months Ended |
--- | --- | --- | ---
Oct. 16, 2024 | Jul. 31, 2018 | Jun. 30, 2011 | Dec. 31, 2024
Lessee, operating lease, liability, to be paid |  |  |  | $ 10,750
Lease Commitments [Member] |  |  |  |
Lessee, operating lease, liability, to be paid |  |  |  | 10,800
Performance Obligation Commitments [Member] |  |  |  |
Surety bonds |  |  |  | 213,600
Letters of credit outstanding, amount |  |  |  | 6,200
Greens Creek [Member] |  |  |  |
Contractual obligation |  |  |  | 24,100
Greens Creek [Member] | Purchase Orders and Commitment [Member] |  |  |  |
Contractual obligation |  |  |  | 5,800
Lucky Friday [Member] |  |  |  |
Estimated response costs | $ 299,000 |  |  |
Payments for legal settlements | $ 174,300 |  |  |
Lucky Friday [Member] | Purchase Orders and Commitment [Member] |  |  |  |
Contractual obligation |  |  |  | 9,700
Keno Hill [Member] | Purchase Orders and Commitment [Member] |  |  |  |
Contractual obligation |  |  |  | 11,200
Casa Berardi [Member] | Purchase Orders and Commitment [Member] |  |  |  |
Contractual obligation |  |  |  | $ 9,100
Johnny M Mine Area near San Mateo, New Mexico [Member] |  |  |  |
Estimated response costs |  | $ 9,600 |  |
Carpenter Snow Creek Superfund Site, Cascade County, Montana [Member] |  |  |  |
Estimated response costs |  |  | $ 4,500 |
Estimated future response cost |  |  | $ 100,000 |

X
- Definition Represents the estimated future response cost that the EPA may ultimately incur related to a site. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the estimated amount of response costs that have been incurred by the EPA in cleaning up a site. + References No definition available. + Details
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Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of surety bonds in place as of a specified date. Such surety bonds may be for the purpose of, but not limited to, financial support for future reclamation and closure costs, self-insurance, and employee benefit plans. + References No definition available. + Details
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Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (g) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-25 + Details
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X
- Details
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- Details
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- Details
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- Details
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- Details
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X
- Details
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X
- Details
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X
- Details
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X
- Details
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Period Type: |