XML 58 R31.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Note 9 - Shareholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Notes Tables |
Schedule of Potential Per Share Dividend Amounts Quarterly Price Levels [Table Text Block] |
Quarterly average realized silver price per ounce |  |  | Quarterly dividend per share |  |  | Annual dividend per share |
$ | 30 |  |  | $ | 0.01 |  |  | $ | 0.04 |
$ | 35 |  |  | $ | 0.02 |  |  | $ | 0.08 |
$ | 40 |  |  | $ | 0.03 |  |  | $ | 0.12 |
$ | 45 |  |  | $ | 0.04 |  |  | $ | 0.16 |
$ | 50 |  |  | $ | 0.05 |  |  | $ | 0.20 |
$ | 55 |  |  | $ | 0.06 |  |  | $ | 0.24 |
$ | 60 |  |  | $ | 0.07 |  |  | $ | 0.28 |
Schedule of Dividends Payable [Table Text Block] |
|  | (A) |  |  | (B) |  |  | (C) |  |  | (A+B+C) |  |  |  |  |  |
Declaration date |  | Silver-price-linked component per share |  |  | Minimum annual component per share |  |  | Special dividend per share |  |  | Total dividend per share |  |  | Total dividend amount (in millions) |  | Month of payment
May 5, 2014 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | June 2014
July 31, 2014 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | September 2014
November 5, 2014 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | December 2014
February 17, 2015 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | March 2015
May 6, 2015 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | June 2015
August 6, 2015 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | September 2015
November 3, 2015 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | December 2015
February 20, 2016 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 0.9 |  | March 2016
May 4, 2016 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 1.0 |  | June 2016
August 3, 2016 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 1.0 |  | September 2016
November 4, 2016 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 1.0 |  | December 2016
February 21, 2017 |  | $ | — |  |  | $ | 0.0025 |  |  | $ | — |  |  | $ | 0.0025 |  |  | $ | 1.0 |  | March 2017
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Grant Date Fair Value per Share |
Unvested, January 1, 2016 |  |  | 3,375,798 |  |  | $ | 2.73 |
Granted (unvested) |  |  | 1,138,669 |  |  | $ | 4.40 |
Canceled |  |  | (205,032 | ) |  | $ | 2.70 |
Distributed (vested) |  |  | (1,573,871 | ) |  | $ | 2.82 |
Unvested, December 31, 2016 |  |  | 2,735,564 |  |  | $ | 3.41 |
Schedule of Share-based Compensation, Unvested Shares Expected to Vest [Table Text Block] |
| 790,253 |  | in June 2017 |
| 650,137 |  | in July 2017 |
| 379,743 |  | in June 2018 |
| 579,437 |  | in July 2018 |
| 335,994 |  | in June 2019 |

X
- Definition Schedule summarizing the potential per share dividend amounts at different quarterly average realized price levels. + References No definition available. + Details
Name: | hl_ScheduleOfPotentialPerShareDividendAmountsQuarterlyPriceLevelsTableTextBlock
Namespace Prefix: | hl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unvested shares and that dates that they are expected to vest. + References No definition available. + Details
Name: | hl_ScheduleOfSharebasedCompensationUnvestedSharesExpectedToVestTableTextBlock
Namespace Prefix: | hl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_ScheduleOfDividendsPayableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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