Operating Segment and Sales Concentrations (Details 2)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Affiliated Entity [Member] | Manufacturing [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	0.00%	0.10%	0.00%	0.10%
Affiliated Entity [Member] | Railcar Leasing [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	0.30%	0.20%	0.30%	0.20%
Affiliated Entity [Member] | Railcar Services [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	0.00%	4.00%	0.00%	4.70%
Sales Revenue, Segment [Member] | Manufacturing [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	28.40%	34.30%	32.70%	32.50%