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Long-Term Debt (Narrative) (Capital Lease Obligations) (Details) - Capital Lease Obligations [Member]
$ in Millions
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]  
Capital lease obligations for machinery and equipment $ 13.0
Minimum [Member]  
Debt Instrument [Line Items]  
Debt instrument, interest rate (as a percent) 1.80%
Maximum [Member]  
Debt Instrument [Line Items]  
Debt instrument, interest rate (as a percent) 6.00%