Commitments and Contingencies (Details) (USD $)
3 Months Ended 12 Months Ended 3 Months Ended 15 Months Ended
Mar. 31, 2015
claim
LegalMatter
Dec. 31, 2014
claim
LegalMatter
Dec. 31, 2012
Mar. 31, 2014
Mar. 31, 2015
Commitments and Contingencies Disclosure [Line Items]          
Number of pending claims (legal matter) 424 438     424
Description of named defendants Cases involving us typically name 50-300 defendants        
Number of claims dismissed 62 104      
Number of claims settled (claim) 0 13      
Claims settlements amount $ 0 $ 3,200,000      
Cost sharing agreement, expiration date Jan. 25, 2015        
Asbestos-related liabilities, estimated liability   56,500,000      
Asbestos-related liabilities, estimated insurance recovery   53,000,000      
Minimum [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Number of defendants (defendant) 1        
Maximum [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Number of defendants (defendant) 833        
Asbestos forcast claim period (years) 10 years   10 years    
Superfund Sites Proceedings [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Number of pending claims (legal matter) 1       1
Estimated total cleanup costs, cost sharing percentage (percent) 2.00%        
Loss contingency, minimum possible loss       18,800,000  
Loss contingency, maximum possible loss       29,600,000  
Estimated total cleanup costs, accrual 400,000       400,000
PCB Contamination Proceedings [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Estimated total cleanup costs, accrual 700,000       700,000
Accrual for environmental loss contingencies 200,000       200,000
Remediation and monitoring costs incurred since inception related to the PCB soil and building contamination   500,000     2,400,000
Connecticut Voluntary Corrective Action Program [Member]          
Commitments and Contingencies Disclosure [Line Items]          
PCB contamination of the building, liability recording during the period 100,000        
Claim of Improper Relationship Termination [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Claims settlements amount $ 500,000