Annual report pursuant to Section 13 and 15(d)

Income Taxes Income Taxes (Effective Income Tax Rate Reconciliation) (Details)

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Income Taxes Income Taxes (Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Percent [Abstract]      
Provision at statutory rate 21.00% 21.00% 35.00%
State income taxes, net of federal benefit 2.90% 2.20% 1.00%
Foreign taxes 1.00% 0.80% 0.00%
Effective Income Tax Rate Reconciliation, Write-off of investment and Notes, Percent (3.10%) 0.00% 0.00%
Valuation allowance 3.20% 2.60% 1.00%
Permanent differences (0.20%) (0.20%) (2.20%)
Impact of Tax Cuts and Jobs Act 0 0 (0.26)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent 0.90% 0.60% 4.00%
Impact of foreign currency tax regulation (0.70%) (0.60%) 0.40%
Other, net (0.70%) 0.10% (0.40%)
Total income tax expense 24.30% 26.50% 12.80%