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%