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Income Taxes (Reconciliation of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax at federal statutory rate	21.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	(35.20%)	0.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	0.00%	0.00%	(2548.10%)
State income taxes, net of federal benefit	5.90%	2.70%	(60.80%)
Company provided benefits	0.70%	0.50%	10.60%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	(0.20%)	(0.30%)	(7.10%)
Effective Income Tax Rate Reconciliation, Company Provided Benefits	0.10%	0.50%	15.20%
Effective Income Tax Rate Reconciliation, Compensation-based credits	(1.90%)	(1.00%)	(22.30%)
Other, net	0.40%	(0.40%)	3.70%
Effective tax rate	26.00%	1.80%	(2573.80%)

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