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Employee Benefit Plans (Narratives) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Employee Benefit Plans Disclosure [Abstract] |  |  |  |  |
Expected employer contribution in current remaining fiscal year | $ 0.3 |  | $ 0.3 |  |
Defined Benefit Plan Payments In Current Fiscal Year | 0.2 | $ 0.2 | 0.4 | $ 0.4 |
Defined Benefit Plans Liabilities Noncurrent | $ 0.9 |  | $ 0.9 |  | $ 0.9

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