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Income Taxes (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Income Tax Contingency [Line Items]      
Valuation allowance $ 100,000   $ 100,000
Uncertain tax positions $ 0   $ 0
Income tax expense at statutory rate 35.00% 35.00%  
Effective income tax rate 20.60% 36.80%  
Tax impact of windfall tax benefits from stock compensation $ 800,000