XML 23 R33.htm IDEA: XBRL DOCUMENT v3.3.0.814
Note 4 - Commitments, Contingencies and Obligations (Details)
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Feb. 04, 2015
USD ($)
Dec. 11, 2013
USD ($)
Apr. 12, 2013
USD ($)
Aug. 31, 2012
USD ($)
Jun. 30, 2011
USD ($)
Jul. 30, 2010
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2013
USD ($)
Jun. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Aug. 06, 2015
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Equity Method Investment, Ownership Percentage                   100.00%    
Maximum Environmental Remediation Obligation                 $ 2,500,000      
Loss Contingency, Damages Sought, Value               $ 5,000,000        
Contractual Obligations                   $ 21,300,000    
Commitments For Capital Lease Payments                   19,800,000    
Surety Bonds                   92,300,000    
Letters of Credit Outstanding, Amount                   8,100,000    
Loss Contingency, Number of Plaintiffs   4                    
Loss Contingency, Estimate of Possible Loss   $ 1,000,000                    
Johnny M Mine Area near San Mateo, New Mexico [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Payment Of Response Costs       $ 1,100,000     $ 1,100,000          
Estimated Response Costs                 5,600,000      
Liability for Remediation                 5,600,000      
Carpenter Snow Creek Superfund Site, Cascade County, Montana [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Estimated Response Costs         $ 4,500,000              
Estimated Future Response Cost         $ 100,000,000              
Gilt Edge Site and Nelson Tunnel/Commodore Site [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Liability for Remediation                 $ 9,900,000      
Costs Incurred By The EPA [Member] | Gilt Edge Mine Superfund Site [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Incurred Response Costs           $ 225,000,000            
Revett Mining Company, Inc. [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Debt Instrument, Interest Rate, Stated Percentage                       6.25%
Business Combination, Consideration Held for Reclamation                   6,500,000    
Joint Venture [Member] | Rio Grande Silver Inc And Emerald Mining And Leasing LLC [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Equity Method Investment, Ownership Percentage                 70.00%      
Greens Creek [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Open Purchase Orders                   7,200,000    
Noncapital Costs                   1,200,000    
Casa Berardi [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Open Purchase Orders                   700,000    
Noncapital Costs                   800,000    
Lucky Friday [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Open Purchase Orders                   700,000    
Noncapital Costs                   1,500,000    
United Steel Workers, Local 5114 [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Litigation Settlement, Compensation Period 8 days                      
Litigation Settlement, Amount $ (13,000)                      
Senior Notes [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Proceeds from Issuance of Debt     $ 500,000,000                  
Debt Instrument, Interest Rate, Stated Percentage     6.875%                  
Debt Instrument, Increase (Decrease), Net                     $ 6,500,000  
Minimum [Member] | Johnny M Mine Area near San Mateo, New Mexico [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Estimated Alternative Response Costs                 $ 0      
Minimum [Member] | United Steel Workers, Local 5114 [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Loss Contingency, Damages Sought, Value                   0    
Maximum [Member] | Johnny M Mine Area near San Mateo, New Mexico [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Estimated Alternative Response Costs                 $ 221,000,000      
Maximum [Member] | United Steel Workers, Local 5114 [Member]                        
Note 4 - Commitments, Contingencies and Obligations (Details) [Line Items]                        
Loss Contingency, Damages Sought, Value                   $ 10,000,000