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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Statutory federal income tax rate 21.00% 21.00% 35.00%
State income taxes, net of federal tax benefit 3.60% 4.00% 2.90%
Domestic production activities deduction (2.60%)
Impact of Accounting Standard Update 2016-09 (0.90%)
Impact of Tax Cuts and Jobs Act on deferred taxes (0.70%)
Other items 0.40% 0.90% (0.90%)
Effective income tax rate 25.00% 25.90% 32.80%