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Income Taxes (Details 2) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
Statutory federal income tax rate | 35.00% | 35.00% | 35.00%
Increase (decrease) due to |  |  |
State income taxes | 3.41% | 5.57% | 5.26%
Deferred tax adjustment related to Tax Act | 7.85% |  |
Tax exempt interest and dividend income | (0.61%) | (0.98%) | (1.25%)
Stock-based compensation expense | 0.01% | 0.01% | 0.02%
Other | 0.38% | (1.01%) | (1.28%)
Effective tax rates | 46.04% | 38.59% | 37.75%

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: 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 + Details
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