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Segment Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Total assets $ 184,105 $ 168,814 $ 182,742
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Total operating assets 184,074   182,715
Consolidated income taxes receivable 31   27
Total assets 184,105   182,742
Operating Segments [Member] | Manufacturing [Member]      
Segment Reporting Information [Line Items]      
Total operating assets 140,919   114,669
Operating Segments [Member] | Corporate and Other [Member]      
Segment Reporting Information [Line Items]      
Total operating assets $ 43,155   $ 68,046