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Income Taxes
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]
INCOME TAXES:
The Company's effective income tax rate in the three months ended March 31, 2015 was 41.4%, compared with 36.4% in the three months ended March 31, 2014. The higher effective income tax rate for the three months ended March 31, 2015 was driven primarily by certain costs related to the Freightliner acquisition that are not tax deductible.