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Income Taxes Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |
Federal statutory rate | $ 3,834 | $ 11,474 | $ 11,300
Federal statutory rate (as a percent) | 21.00% | 35.00% | 35.00%
Effect of state income taxes, net of federal benefit | $ 1,776 | $ 1,304 | $ 1,127
Effect of state income taxes, net of federal benefit (as a percent) | 9.70% | 4.00% | 3.50%
Effect of non-deductible expenses and other, net | $ 1,451 | $ (36) | $ 213
Effectof non-deductible expenses and other, net (as a percent) | 7.90% | (0.10%) | 0.70%
Change in valuation allowance | $ 26 | $ 23 | $ 20
Change in valuation allowance (as a percent) | 0.10% | 0.10% | 0.10%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | $ (466) | $ (17,176) | $ 0
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | (2.50%) | (52.40%) | 0.00%
Total income tax provision (benefit) | $ 6,621 | $ (4,411) | $ 12,660
Income tax expense (benefit) (as a percent) | 36.20% | (13.50%) | 39.30%

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