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Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Hecla [Member] | Interest-bearing Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value $ 683 $ 609
Hecla [Member] | Interest-bearing Deposits [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   609
Hecla [Member] | Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,309 2,071
Hecla [Member] | Common Stock [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   2,071
Hecla [Member] | Real Estate Investments [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 9,611 6,497
Hecla [Member] | Real Estate Investments [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   6,497
Hecla [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 10,095 12,641
Hecla [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 7,251 6,803
Hecla [Member] | Common Collective Funds [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   19,444
Hecla [Member] | Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 24,183 22,667
Hecla [Member] | Mutual Funds [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   22,667
Hecla [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 27,175 25,347
Hecla [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 10,095 12,641
Hecla [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 16,862 13,300
Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value   51,288
Lucky Friday [Member] | Interest-bearing Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 198 166
Lucky Friday [Member] | Interest-bearing Deposits [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 198 166
Lucky Friday [Member] | Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 588 527
Lucky Friday [Member] | Common Stock [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 588 527
Lucky Friday [Member] | Real Estate Investments [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,513 1,709
Lucky Friday [Member] | Real Estate Investments [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,513 1,709
Lucky Friday [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,469 3,310
Lucky Friday [Member] | Common Collective Funds [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 1,978 1,857
Lucky Friday [Member] | Common Collective Funds [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 4,447 5,167
Lucky Friday [Member] | Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 6,637 6,225
Lucky Friday [Member] | Mutual Funds [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 6,637 6,225
Lucky Friday [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 7,423 6,918
Lucky Friday [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,469 3,310
Lucky Friday [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 4,491 3,566
Lucky Friday [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 14,383 13,794
Interest-bearing Deposits [Member] | Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 683  
Common Stock [Member] | Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 2,309  
Real Estate Investments [Member] | Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 9,611  
Common Collective Funds [Member] | Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 17,346  
Mutual Funds [Member] | Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value 24,183  
Hecla [Member]
    
Note 8 - Employee Benefit Plans (Details) - Fair Value By Asset Category [Line Items]    
Assets at fair value $ 54,132