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Operating Segments and Related Information Operating Segments and Related Information - Discontinued Statement of Cash Flows (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting [Abstract]    
Cash Provided by (Used in) Operating Activities, Discontinued Operations $ (684) $ (1,023)
Cash Provided by (Used in) Investing Activities, Discontinued Operations 0 0
Cash Provided by (Used in) Financing Activities, Discontinued Operations 0 0
Net Cash Provided by (Used in) Discontinued Operations $ (684) $ (1,023)