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Commitments and Contingencies (Details)
€ in Millions, CAD in Millions, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Aug. 31, 2017
EUR (€)
Aug. 31, 2017
USD ($)
Dec. 31, 2016
EUR (€)
Dec. 31, 2016
USD ($)
Mar. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2017
CAD
Jul. 07, 2016
USD ($)
Rochester, New Hampshire                  
Loss Contingencies [Line Items]                  
Expense associated with expected costs of site investigation         $ 0.2        
Rochester, New Hampshire | Environmental Contamination                  
Loss Contingencies [Line Items]                  
Accrual for environmental liability             $ 0.1    
Reduction to accrual for environmental liability, payments             0.1    
Accrual for environmental liability, including revision (fully offset)             0.2    
Texel | Quebec, Canada                  
Loss Contingencies [Line Items]                  
Indemnification assets, minimum estimated outcome                 $ 0.9
Indemnification assets, maximum estimated outcome                 $ 1.5
Environment remediation indemnity secured by environmental escrow account             2.4 CAD 3.0  
Environmental remediation indemnity secured by general escrow account             11.2 14.0  
Environmental remediation indemnity secured by general escrow account, reduced amount after share purchase agreement             5.6 CAD 7.0  
Texel | Quebec, Canada | Environmental Contamination                  
Loss Contingencies [Line Items]                  
Accrual for environmental liability       $ 0.9     1.3    
Accrual for environmental liability, revision of estimate           $ 0.6      
Reduction to accrual for environmental liability, payments             0.2    
Accrual for environmental liability, including revision (fully offset)           $ 1.5 $ 1.3    
Lydall Gerhardi | German Federal Cartel Office, Bundeskartellamt                  
Loss Contingencies [Line Items]                  
Litigation settlement amount awarded to other party € 3.3 $ 3.9 € 3.3            
Litigation settlement expense     € 3.3 $ 3.5