Business Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other (expense) income - net	$ 2,880	$ 209	$ 2,751	$ 1,909
Income from continuing operations before income taxes	2,916	2,836	5,318	11,845
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit for reportable segments	7,039	6,117	17,215	19,565
Interest expense - net	(722)	(940)	(2,454)	(2,841)
Other (expense) income - net	(116)	(243)	74	2,178
Unallocated corporate expenses and other unallocated charges	(3,285)	(2,098)	(9,517)	(7,057)
Income from continuing operations before income taxes	$ 2,916	$ 2,836	$ 5,318	$ 11,845