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Contingencies and Significant Estimates (Details) - USD ($)
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Product liability reserves      
Period over which product liability self-insurance retention levels have fluctuated (in years) 10 years    
Product liability reserves $ 21,400,000 $ 21,900,000  
Warranty claims reserves 46,100,000 $ 43,900,000 $ 50,200,000
Maximum      
Product liability reserves      
Product liability self-insurance maximum retention level for new occurrence $ 2,000,000.0