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Income Taxes Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Federal statutory rate $ 11,300 $ 12,105 $ 7,719
Federal statutory rate (as a percent) 35.00% 35.00% 34.00%
Effect of state income taxes, net of federal benefit $ 1,127 $ 1,618 $ 831
Effect of state income taxes, net of federal benefit (as a percent) 3.50% 4.70% 3.70%
Effect of non-deductible expenses and other, net $ 213 $ 155 $ 583
Effectof non-deductible expenses and other, net (as a percent) 0.70% 0.40% 2.60%
Change in valuation allowance $ 20 $ (141) $ (138)
Change in valuation allowance (as a percent) 0.10% (0.40%) (0.60%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount $ 0 $ 0 $ (1,740)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent 0.00% 0.00% (7.70%)
Total income tax provision $ 12,660 $ 13,737 $ 7,255
Income tax expense (benefit) (as a percent) 39.30% 39.70% 32.00%