Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from affiliates included in manufacturing	$ 2,564	$ 188	$ 2,564	$ 325
Revenues from affiliates included in railcar services	0	1,156	17	11,729
Revenues from affiliates included in railcar leasing	404	231	1,219	678
Interest income from related parties	$ 166	$ 280	$ 412	$ 642