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Commitments and Contingencies (Details) (USD $)
 3 Months Ended 151 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Asbestos [Member]
Claim
Mar. 31, 2014
Asbestos [Member]
Claim
Mar. 31, 2014
Asbestos [Member]
Minimum [Member]
Mar. 31, 2014
Asbestos [Member]
Maximum [Member]
Loss Contingencies [Line Items]            
Pending claims, approximate number     2,310 2,310    
Reimbursement from insurance carrier for settled claims       $ 15,200,000    
Estimated legal costs         24,400,000 37,400,000
Increase for low end of range     2,700,000      
Decrease for high end of range     4,100,000      
Range of possible loss, minimum     27,400,000 27,400,000    
Range of possible loss, maximum     48,100,000 48,100,000    
Changes in product warranties [Roll forward]            
Balance, beginning of period 18,041,000 17,288,000        
Liabilities accrued for current year sales 19,191,000 18,356,000        
Settlements of warranty claims (16,858,000) (16,230,000)        
Balance, end of period $ 20,374,000 $ 19,414,000