Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues from affiliates included in manufacturing	$ 223	$ 61,743	$ 776	$ 182,939
Revenues from affiliates included in railcar services	7,249	6,406	15,243	12,786
Interest income from related parties	$ 427	$ 538	$ 884	$ 1,095