Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from affiliates included in manufacturing	$ 0	$ 137	$ 0	$ 137
Revenues from affiliates included in railcar services	15	4,425	17	10,572
Revenues from affiliates included in railcar leasing		223	816	447
Interest income from related parties	$ 192	$ 306	$ 412	$ 642