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Commitments and Contingencies (Narratives) (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
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Loss contingency |  |
Accrued liability for the outcomes of non-income based tax audits | $ 4.5 | $ 4.5
Indemnification liability | $ 2.7 | $ 2.6

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