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Other Charges , Net Other Charges, Net (Details) - USD ($)
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Other Income and Expenses [Abstract]      
Business Acquisition, Transaction Costs $ 1,700,000   $ 1,100,000
Gain (Loss) on Disposition of Assets 3.4    
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax $ 0 $ 8,189,000.0