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Employee Benefit Plans (Incurred Expenses Related To Defined Contribution Plans For Non-U.S. Employees) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Employee Benefit Plans [Abstract] |  |  |
Incurred Expenses | $ 3,039 | $ 2,216 | $ 2,057

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