XML 66 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

Note 7 - Stockholders' Equity - Common Stock Dividend Policy (Details) | 9 Months Ended
--- | ---
Sep. 30, 2021 $ / shares
Quarterly Average Realized Price, Level 1 [Member] |
Quarterly dividend per share (in dollars per share) | $ 0.0025
Annual dividend per share (in dollars per share) | 0.01
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.025
Quarterly Average Realized Price, Level 2 [Member] |
Quarterly dividend per share (in dollars per share) | 0.01
Annual dividend per share (in dollars per share) | 0.04
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.055
Quarterly Average Realized Price, Level 3 [Member] |
Quarterly dividend per share (in dollars per share) | 0.015
Annual dividend per share (in dollars per share) | 0.06
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.075
Quarterly Average Realized Price, Level 4 [Member] |
Quarterly dividend per share (in dollars per share) | 0.025
Annual dividend per share (in dollars per share) | 0.10
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.115
Quarterly Average Realized Price, Level 5 [Member] |
Quarterly dividend per share (in dollars per share) | 0.035
Annual dividend per share (in dollars per share) | 0.14
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.155
Quarterly Average Realized Price, Level 6 [Member] |
Quarterly dividend per share (in dollars per share) | 0.045
Annual dividend per share (in dollars per share) | 0.18
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.195
Quarterly Average Realized Price, Level 7 [Member] |
Quarterly dividend per share (in dollars per share) | 0.055
Annual dividend per share (in dollars per share) | 0.22
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | $ 0.235

X
- Definition Represents the annual dividend per share. + References No definition available. + Details
Name: | hl_AnnualDividendPerShare
Namespace Prefix: | hl_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of annualized dividends per share. + References No definition available. + Details
Name: | hl_AnnualizedDividendsPerShare
Namespace Prefix: | hl_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum annual component per share. + References No definition available. + Details
Name: | hl_MinimumAnnualComponentPerShare
Namespace Prefix: | hl_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the quarterly dividend per share. + References No definition available. + Details
Name: | hl_QuarterlyDividendPerShare
Namespace Prefix: | hl_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=hl_QuarterlyAverageRealizedPriceLevel7Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |