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v3.19.3.a.u2

Property, Plant and Equipment (Narrative) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Continuing Operations [Member] |  |  |
Depreciation and amortization | $ 3.7 | $ 3.6 | $ 4.2

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