Operating Segments and Sales, Geographic and Credit Concentrations (Details 2)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Number of reportable segments	3
Foreign Operations [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from company's foreign operations	2.00%	0.90%	1.20%
Percentage of foreign assets of the total consolidated assets	2.60%	1.50%
Sales Revenue, Segment [Member] | AEP Leasing LLC [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from significant customer	31.70%	0.00%	0.00%
Sales Revenue, Segment [Member] | CIT Group, Inc [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from significant customer	24.40%	49.40%	33.50%
Sales Revenue, Segment [Member] | Banc of America Leasing and Capital LLC [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from significant customer	0.00%	0.00%	11.80%
Railcar Services [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from affiliates	2.30%	3.00%	4.80%
Number of customers that made up more than 10% of consolidated revenues	0	0	0
Number of customers that made up more than 10% of consolidated accounts receivable	0	0
Railcar Leasing [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from affiliates	0.00%	0.00%	0.00%
Number of customers that made up more than 10% of consolidated revenues	0	0	0
Number of customers that made up more than 10% of consolidated accounts receivable	0	0
Operating Segments [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Percentage of revenue from affiliates	33.40%	14.50%	0.20%
Operating Segments [Member] | Accounts Receivable [Member]
Operating Segment and Sales and Credit Concentrations (Textual) [Abstract]
Manufacturing receivables from significant customers	22.60%	35.10%