Goodwill and Intangible Assets (Schedule of Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2019
Intangible Assets
Cost	$ 6,470	$ 2,030
Accumulated Amortization	(3,196)	(1,572)
Asset Impairments	(2,970)
Net Carrying Value	$ 304	$ 458