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Goodwill and Intangible Assets - Reconciliation (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 3,638 $ 3,556
Finite-Lived Intangible Assets, Net 23,765 27,795
Intangible Assets, Net (Excluding Goodwill) $ 27,403 $ 31,351