Annual report pursuant to Section 13 and 15(d)

Income Taxes (Effective Income Tax Reconciliation) (Details)

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Income Taxes (Effective Income Tax Reconciliation) (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Federal statutory rate 21.00% 35.00% 35.00%
State and local income taxes, net of federal tax benefits 2.90% 3.60% 4.50%
Effective Income Tax Rate Reconciliation Taxes On Foreign Income Net Of Tax Credits 0.30% 0.40% 0.10%
Taxes on foreign income, net of tax credits 1.90% 0.80% (0.20%)
Valuation allowances 1.40% (0.10%) (0.20%)
Impact of U.S. tax reform (1.80%) (34.90%) 0.00%
Other 1.70% 0.50% 0.90%
Effective income tax rate, percent 27.40% 5.30% 40.10%