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Segment Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 170,058	$ 158,591	$ 182,742
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total operating assets	169,686		182,715
Consolidated income taxes receivable	372		27
Total assets	170,058		182,742
Operating Segments [Member] | Manufacturing [Member]
Segment Reporting Information [Line Items]
Total operating assets	133,342		114,669
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total operating assets	$ 36,344		$ 68,046

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