XML 104 R71.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy | 12 Months Ended
--- | ---
Dec. 31, 2015 $ / shares $ / oz
$30 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 30
Quarterly dividend per share | $ 0.01
Annual dividend per share | $ 0.04
$35 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 35
Quarterly dividend per share | $ 0.02
Annual dividend per share | $ 0.08
$40 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 40
Quarterly dividend per share | $ 0.03
Annual dividend per share | $ 0.12
$45 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 45
Quarterly dividend per share | $ 0.04
Annual dividend per share | $ 0.16
$50 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 50
Quarterly dividend per share | $ 0.05
Annual dividend per share | $ 0.20
$55 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 55
Quarterly dividend per share | $ 0.06
Annual dividend per share | $ 0.24
$60 [Member] |
Note 9 - Stockholders' Equity (Details) - Common Stock Dividend Policy [Line Items] |
Quarterly average realized silver price per ounce (in Dollars per Ounce) | $ / oz | 60
Quarterly dividend per share | $ 0.07
Annual dividend per share | $ 0.28

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

X
- References No definition available. + Details
Name: | hl_Note9StockholdersEquityDetailsCommonStockDividendPolicyLineItems
Namespace Prefix: | hl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | hl_QuarterlyAverageRealizedSilverPrice
Namespace Prefix: | hl_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_ThirtyDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_ThirtyFiveDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_FortyDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_FortyFiveDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_FiftyDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_FiftyFiveDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hl_QuarterlyAverageRealizedSilverPricePerOunceAxis=hl_SixtyDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |