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Income Taxes (Income Tax Years Subject to Examination) (Details) | 12 Months Ended
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Dec. 31, 2019
U.S. Federal [Member] |
Income Tax Contingency [Line Items] |
Open Tax Year | 2017
PENNSYLVANIA |
Income Tax Contingency [Line Items] |
Open Tax Year | 2000
TEXAS |
Income Tax Contingency [Line Items] |
Open Tax Year | 2018
ILLINOIS |
Income Tax Contingency [Line Items] |
Open Tax Year | 2010
VIRGINIA |
Income Tax Contingency [Line Items] |
Open Tax Year | 2016
COLORADO |
Income Tax Contingency [Line Items] |
Open Tax Year | 2010
INDIANA |
Income Tax Contingency [Line Items] |
Open Tax Year | 2010
NEBRASKA |
Income Tax Contingency [Line Items] |
Open Tax Year | 2016
ALABAMA |
Income Tax Contingency [Line Items] |
Open Tax Year | 2016
China [Member] |
Income Tax Contingency [Line Items] |
Open Tax Year | 2016

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