XML 302 R28.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Note 6 - Employee Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Notes Tables |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Pension Benefits |
|  | 2021 |  |  | 2020 |
Change in benefit obligation: |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 192,954 |  |  | $ | 172,909 |
Service cost |  |  | 5,820 |  |  |  | 5,334 |
Interest cost |  |  | 4,990 |  |  |  | 5,618 |
Amendments |  |  | 550 |  |  |  | — |
Change due to mortality change |  |  | 548 |  |  |  | (1,521 | )
Change due to discount rate change |  |  | (5,865 | ) |  |  | 17,040 |
Actuarial return (loss) |  |  | 4,342 |  |  |  | 121 |
Benefits paid |  |  | (7,477 | ) |  |  | (6,547 | )
Benefit obligation at end of year |  |  | 195,862 |  |  |  | 192,954 |
Change in fair value of plan assets: |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  |  | 148,052 |  |  |  | 116,067 |
Actual return on plan assets |  |  | 27,049 |  |  |  | 14,801 |
Employer contributions |  |  | 22,250 |  |  |  | 23,731 |
Benefits paid |  |  | (7,477 | ) |  |  | (6,547 | )
Fair value of plan assets at end of year |  |  | 189,874 |  |  |  | 148,052 |
Underfunded status at end of year |  | $ | (5,988 | ) |  | $ | (44,902 | )
Pension Benefits Recognized Balance Sheet Location [Table Text Block] |
|  | Pension Benefits |
|  | 2021 |  |  | 2020 |
Current liabilities: |  |  |  |  |  |  |  |
Accrued benefit liability |  | $ | (1,315 | ) |  | $ | (758 | )
Non- current pension liability: |  |  |  |  |  |  |  |
Accrued benefit liability |  |  | (4,673 | ) |  |  | (44,144 | )
Accumulated other comprehensive loss |  |  | 29,966 |  |  |  | 53,085 |
Net amount recognized |  | $ | 23,978 |  |  | $ | 8,183 |
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | Pension Benefits |
|  | 2021 |  |  |  |  |  |  | 2020 |
Discount rate: net periodic pension cost |  |  | 2.64 | % |  |  |  |  |  |  | 3.32 | %
Discount rate: projected benefit obligation |  |  | 2.86 | % |  |  |  |  |  |  | 2.64 | %
Expected rate of return on plan assets |  |  | 6.40 | % |  |  |  |  |  |  | 6.45 | %
Rate of compensation increase: net periodic pension cost |  | 5.00%/2.00% |  |  |  | (1 | ) |  |  | 2.00 | %
Rate of compensation increase: projected benefit obligation |  | 5.00%/2.00% |  |  |  | (1 | ) |  |  | 2.00 | %
Schedule of Net Benefit Costs [Table Text Block] |
|  | Pension Benefits |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Service cost |  | $ | 5,820 |  |  | $ | 5,334 |  |  | $ | 4,401 |
Interest cost |  |  | 4,990 |  |  |  | 5,618 |  |  |  | 6,482 |
Expected return on plan assets |  |  | (9,252 | ) |  |  | (7,489 | ) |  |  | (5,982 | )
Amortization of prior service benefit |  |  | 394 |  |  |  | 117 |  |  |  | 61 |
Amortization of net gain from earlier periods |  |  | 4,502 |  |  |  | 4,652 |  |  |  | 4,389 |
Net periodic pension cost |  | $ | 6,454 |  |  | $ | 8,232 |  |  | $ | 9,351 |
Investment Policy Allocation [Table Text Block] |
|  | Target |  |  | Maximum |
Large cap U.S. equities |  |  | 17 | % |  |  | 20 | %
Small cap U.S. equities |  |  | 8 | % |  |  | 10 | %
Non-U.S. equities |  |  | 25 | % |  |  | 30 | %
U.S. Fixed income |  |  | 18 | % |  |  | 23 | %
Emerging markets debt |  |  | 5 | % |  |  | 8 | %
Real estate |  |  | 15 | % |  |  | 18 | %
Absolute return |  |  | 5 | % |  |  | 7 | %
Company stock/Real return |  |  | 7 | % |  |  | 13 | %
Fair Value of Plan Assets by Category [Table Text Block] |
|  | Hecla plans |  |  | Lucky Friday |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Investments measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing cash |  | $ | 1,835 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,835 |  |  | $ | 305 |  |  | $ | — |  |  | $ | — |  |  | $ | 305 |
Common stock |  |  | 8,869 |  |  |  | — |  |  |  | — |  |  |  | 8,869 |  |  |  | 1,580 |  |  |  | — |  |  |  | — |  |  |  | 1,580 |
Mutual funds |  |  | 96,957 |  |  |  | — |  |  |  | — |  |  |  | 96,957 |  |  |  | 15,707 |  |  |  | — |  |  |  | — |  |  |  | 15,707 |
Total investments in the fair value hierarchy |  |  | 107,661 |  |  |  | — |  |  |  | — |  |  |  | 107,661 |  |  |  | 17,592 |  |  |  | — |  |  |  | — |  |  |  | 17,592 |
Investments measured at net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,119 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,482 |
Hedge funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,866 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,828 |
Common collective funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,626 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,700 |
Total investments measured at net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,611 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,010 |
Total fair value |  | $ | 107,661 |  |  | $ | — |  |  | $ | — |  |  | $ | 160,272 |  |  | $ | 17,592 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,602 |
|  | Hecla |  |  | Lucky Friday |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Investments measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing cash |  | $ | 367 |  |  | $ | — |  |  | $ | — |  |  | $ | 367 |  |  | $ | 111 |  |  | $ | — |  |  | $ | — |  |  | $ | 111 |
Common stock |  |  | 13,947 |  |  |  | — |  |  |  | — |  |  |  | 13,947 |  |  |  | 3,203 |  |  |  | — |  |  |  | — |  |  |  | 3,203 |
Mutual funds |  |  | 69,994 |  |  |  | — |  |  |  | — |  |  |  | 69,994 |  |  |  | 15,786 |  |  |  | — |  |  |  | — |  |  |  | 15,786 |
Total investments in the fair value hierarchy |  |  | 84,308 |  |  |  | — |  |  |  | — |  |  |  | 84,308 |  |  |  | 19,100 |  |  |  | — |  |  |  | — |  |  |  | 19,100 |
Investments measured at net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,708 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,428 |
Hedge funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,823 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,215 |
Common collective funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,545 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,925 |
Total investments measured at net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,076 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,568 |
Total fair value |  | $ | 84,308 |  |  | $ | — |  |  | $ | — |  |  | $ | 120,384 |  |  | $ | 19,100 |  |  | $ | — |  |  | $ | — |  |  | $ | 27,668 |
Schedule of Expected Benefit Payments [Table Text Block] |
Year Ending December 31, |  | Pension Plans |
2022 |  | $ | 8,816 |
2023 |  |  | 8,765 |
2024 |  |  | 8,944 |
2025 |  |  | 9,135 |
2026 |  |  | 9,212 |
Years 2027-2031 |  |  | 45,880 |
Schedule of Net Funded Status [Table Text Block] |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | ABO Exceeds Plan Assets |  |  | Plan Assets Exceed ABO |  |  | ABO Exceeds Plan Assets |  |  | Plan Assets Exceed ABO |
Projected benefit obligation |  | $ | 195,862 |  |  | $ | — |  |  | $ | 192,954 |  |  | $ | — |
Accumulated benefit obligation |  |  | 191,597 |  |  |  | — |  |  |  | 189,931 |  |  |  | — |
Fair value of plan assets |  |  | 189,873 |  |  |  | — |  |  |  | 148,051 |  |  |  | — |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | Pension Benefits |
Unamortized net (gain)/loss |  | $ | 28,386 |
Unamortized prior service cost |  |  | 1,580 |

X
- Definition Schedule of fair value of plan assets by category. + References No definition available. + Details
Name: | hl_FairValueOfPlanAssetsByCategoryTableTextBlock
Namespace Prefix: | hl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of investment policy allocation. + References No definition available. + Details
Name: | hl_InvestmentPolicyAllocationTableTextBlock
Namespace Prefix: | hl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of pension benefits recognized balance sheet location. + References No definition available. + Details
Name: | hl_PensionBenefitsRecognizedBalanceSheetLocationTableTextBlock
Namespace Prefix: | hl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during the period. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2439-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2410-114920 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of net funded status of pension plans and/or other employee benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetFundedStatusTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration