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Income Taxes (Tax Rate Reconciliation - Discontinued Operations) (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]      
Statutory federal tax rate (21.00%) (21.00%) (21.00%)
State income taxes, net of federal tax benefit 1.80% 1.80% 2.60%
Effective income tax rate 22.80% 22.80% 23.60%
2017 Tax Cuts and Jobs Act [Member]      
Operating Loss Carryforwards [Line Items]      
Statutory federal tax rate 0.00% 0.00% 0.00%