Business Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Profit for reportable segments	$ 6,117	$ 8,970
Interest expense - net	(940)	(1,078)	$ (2,841)	$ (4,030)
Other (expense) income - net	209	374	1,909	764
Income from continuing operations before income taxes	$ 2,836	$ 4,590	$ 11,845	$ 21,656