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Note 8 - Employee Benefit Plans (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 7.20% 7.20%  
Long-term Investments (in Dollars) $ 7,019,000 $ 9,614,000  
Defined Benefit Plan, Assumed Long Term Rate Basis Spread 1.00%    
Defined Benefit Plan, Fair Value of Plan Assets (in Dollars) 69,051,000 68,515,000 65,082,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 55.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 5.00%    
Defined Benefit Plan, Contributions by Employer (in Dollars) 1,403,000 1,447,000  
Defined Benefit Plan, Months of Services Required For Eligibility 6 months    
Defined Contribution Plan, Employer Discretionary Contribution Amount (in Dollars) 293,000 407,000 246,000
Common Stock [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Long-term Investments (in Dollars) 1,600,000 2,900,000  
Defined Benefit Plan, Actual Plan Asset Allocations 2.00% 4.00%  
Real Estate [Member] | Hecla Mining Company Retirement Plan [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 20.00% 18.00%  
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets (in Dollars) 13,700,000 12,100,000  
Common Collective Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets (in Dollars) 10,100,000 9,200,000  
Pension Compensation [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 6.00%    
Pension Compensation in Excess of Social Security Wages [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 5.70%    
Capital Accumulation 401 (K) Plan [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 100.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 6.00%    
Defined Benefit Plan, Contributions by Employer (in Dollars) 3,000,000 2,500,000 2,200,000
Capital Accumulation 401 (K) Plan [Member] | Minimum [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 1.00%    
Capital Accumulation 401 (K) Plan [Member] | Maximum [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 50.00%    
Hecla Mining Company Retirement Plan [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 100.00% 100.00%  
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (in Dollars) 7,500,000    
Unfunded Supplemental Executive Retirement Plan [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (in Dollars) 300,000    
Years 1 through 5 [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Cash Balance Pay Credit Percentage 3.00%    
Years 6 through 10 [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Cash Balance Pay Credit Percentage 4.50%    
After 10 Years [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Cash Balance Pay Credit Percentage 6.00%    
Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets (in Dollars) $ 23,800,000 $ 21,400,000  
Minimum [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 2.00%    
Maximum [Member]
      
Note 8 - Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 50.00%