Business Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other expense - net	$ (59)	$ (606)
Loss from continuing operations before income taxes	(1,591)	(63)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit for reportable segments	1,866	2,775
Interest expense - net	(871)	(812)
Other expense - net	(59)	(606)
Unallocated corporate expenses and other unallocated charges	(2,527)	(1,420)
Loss from continuing operations before income taxes	$ (1,591)	$ (63)