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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Carrying amount of goodwill $ 48,282 $ 48,282  
Amortization expense of identifiable intangible assets $ 96 $ 119 $ 162