Schedule of Assets - Schedule of Assets (Held at End of Year) (Details) - EBP 004 [Member] shares in Thousands |
12 Months Ended |
|
Dec. 31, 2025
USD ($)
shares
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| EBP, Plan Name |
Capital Accumulation Plan
|
| Entity Tax Identification Number |
77-0664171
|
| EBP, Plan Number |
004
|
| Current Value |
$ 3,103,722
|
| Total Investments |
$ 233,134,975
|
| EBP, Investment, Number of Shares | shares |
3,197,065
|
| Investment, Identifier [Axis]: Common Stock Hecla Mining Co. 3,197,065 shares of common stock |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 60,881,955
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
Common Stock [Member]
|
| EBP, Asset Held for Investment, Party-in-Interest [true false] |
true
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common Stock [Member]
|
| Investment, Identifier [Axis]: Money Market Vanguard Federal Money Market |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 6,293,444
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Money Market Funds [Member]
|
| Investment, Identifier [Axis]: Mutual Funds American Funds Growth Fund of America; R-4 Class |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 8,990,726
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
American [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Artisan International Fund, Investor Class |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 2,037,994
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Artisan [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard 500 Index Fund Investor Shares |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 12,498,154
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Growth and Income Fund Investor Shares |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 6,630,092
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Small-Cap Value Index Fund Admiral |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 1,811,322
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Strategic Equity Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 4,315,295
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2020 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 2,337,176
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2025 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 11,453,285
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2030 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 16,601,265
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2035 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 22,020,694
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2040 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 15,143,244
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2045 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 17,200,338
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2050 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 16,434,067
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2055 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 7,124,390
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2060 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 4,450,036
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2065 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 2,155,516
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement 2070 Fund |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 1,223,820
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
Mutual Fund [Member]
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Target Retirement Income |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 1,890,911
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Total Bond Market Index Fund Investor Shares |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 1,624,529
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Total International Bond Index Fund Investor Shr |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 600,835
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Total Stock Market Index Fund Admiral Shares |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 4,476,988
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Mutual Funds Vanguard Windsor II Fund Investor Shares |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 1,835,177
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
Vanguard [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual Fund [Member]
|
| Investment, Identifier [Axis]: Participant Loans Participant loans Interest rates ranging from 4.25% to 9.50% |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
Participant Loans [Member]
|
| EBP, Asset Held for Investment, Party-in-Interest [true false] |
true
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Participant Loans [Member]
|
| Investment, Identifier [Axis]: Total Mutual Funds |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| Current Value |
$ 162,855,854
|
| Maximum [Member] |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| EBP, Asset Held for Investment, Participant Loan, Interest Rate |
9.50%
|
| Minimum [Member] |
|
| EBP, Schedule of Asset Held for Investment [Line Items] |
|
| EBP, Asset Held for Investment, Participant Loan, Interest Rate |
4.25%
|