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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2018
Schedule of Income Tax Rate Reconciliation [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
 
 
Three Months Ended March 31,
 
2018
 
2017
Effective tax rate from continuing operations
 
8.0
%
 
4.9
%