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Income Taxes (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]        
Effective income tax rate reconciliation percent 27.80% 45.30% 26.70% 32.10%
Effective income tax rate reconciliation at federal statutory income tax rate, percent     21.00%