Annual report pursuant to Section 13 and 15(d)

Property And Equipment (Narrative) (Details)

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Property And Equipment (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property And Equipment [Abstract]      
Depreciation expense $ 4,423 $ 2,883 $ 2,264