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Income Taxes (Reconciliation of Effective Income Tax Rate) (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
Tax at federal statutory rate | 35.00% | 35.00% | 35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent | (35.20%) | 0.00% | 0.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent | 0.00% | (2448.10%) | 200.90%
Effective Income Tax Rate Reconciliation, Uncertain Tax Benefits | 0.00% | 0.00% | (421.60%)
State income taxes, net of federal benefit | 2.70% | (59.20%) | 69.20%
Company provided benefits | 0.50% | 10.30% | 19.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent | (0.30%) | (6.90%) | (13.80%)
Effective Income Tax Rate Reconciliation, Company Provided Benefits | 0.50% | 14.80% | 152.90%
Accrued interest on uncertain tax benefits | 0.10% | 2.10% | (139.70%)
Effective Income Tax Rate Reconciliation, Compensation-based credits | (1.00%) | (21.70%) | (60.80%)
Other, net | (0.50%) | 1.50% | (4.50%)
Effective tax rate | 1.80% | (2472.20%) | (163.40%)

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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