Related Party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended			12 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2009 Axis [Member]	Jun. 30, 2014 Term Loan and Credit Agreement [Member] Axis [Member]	Dec. 31, 2013 Term Loan and Credit Agreement [Member] Axis [Member]	Jun. 30, 2014 M.W. Recycling [Member]	Jun. 30, 2013 M.W. Recycling [Member]	Jun. 30, 2014 M.W. Recycling [Member]	Jun. 30, 2013 M.W. Recycling [Member]	Jun. 30, 2014 Joint Ventures [Member]	Jun. 30, 2013 Joint Ventures [Member]	Jun. 30, 2014 Joint Ventures [Member]	Jun. 30, 2013 Joint Ventures [Member]	Dec. 31, 2013 Joint Ventures [Member]	Jun. 30, 2014 Insight Portfolio [Member] Maximum [Member]	Jun. 30, 2013 Insight Portfolio [Member] Maximum [Member]	Jun. 30, 2014 Insight Portfolio [Member] Maximum [Member]	Jun. 30, 2013 Insight Portfolio [Member] Maximum [Member]	Jun. 30, 2014 Purchasing and Engineering Services Agreement [Member] ACF [Member]	Jun. 30, 2013 Purchasing and Engineering Services Agreement [Member] ACF [Member]	Jun. 30, 2014 Purchasing and Engineering Services Agreement [Member] ACF [Member]	Jun. 30, 2013 Purchasing and Engineering Services Agreement [Member] ACF [Member]	Jun. 30, 2014 Railcar services agreement [Member] ARL [Member]	Jun. 30, 2013 Railcar services agreement [Member] ARL [Member]	Jun. 30, 2014 Railcar services agreement [Member] ARL [Member]	Jun. 30, 2013 Railcar services agreement [Member] ARL [Member]	Jun. 30, 2014 Railcar management agreement [Member] ARL [Member]	Jun. 30, 2013 Railcar management agreement [Member] ARL [Member]	Jun. 30, 2014 Railcar management agreement [Member] ARL [Member]	Jun. 30, 2013 Railcar management agreement [Member] ARL [Member]	Jun. 30, 2013 Railcar management agreement [Member] ARL [Member] Maximum [Member]	Jun. 30, 2014 Railcar orders [Member] IELP Entities [Member]	Jun. 30, 2013 Railcar orders [Member] IELP Entities [Member]	Jun. 30, 2014 Railcar orders [Member] IELP Entities [Member]	Jun. 30, 2013 Railcar orders [Member] IELP Entities [Member]	Jun. 30, 2014 Manufacturing services agreement [Member] ACF [Member] Maximum [Member]	Jun. 30, 2013 Manufacturing services agreement [Member] ACF [Member] Maximum [Member]	Jun. 30, 2014 Manufacturing services agreement [Member] ACF [Member] Maximum [Member]	Jun. 30, 2013 Manufacturing services agreement [Member] ACF [Member] Maximum [Member]
Related Party Transactions (Textual) [Abstract]
Component purchases from ACF																																							$ 700,000	$ 100,000	$ 900,000	$ 100,000
Percentage of consideration under agreement																							30.00%	30.00%
Term of agreement																												3 years
Service Agreement Renewal Period																												P1Y
Notes receivable							30,900,000	32,900,000
Expense with related parties													33,500,000	21,700,000	60,400,000	40,100,000		100,000	100,000	100,000	100,000									100,000		200,000	200,000	100,000
Railcar leasing cost of revenues	5,382,000	3,301,000	9,873,000	6,205,000																										1,000,000	500,000	1,800,000	1,000,000
Revenue from related parties									2,100,000	1,600,000	4,300,000	3,300,000										6,100,000	3,200,000	11,700,000	3,400,000	4,700,000	4,600,000	8,700,000	9,200,000						85,000,000	16,700,000	120,600,000	79,500,000
Company's Interest in credit facility						50.00%
Inventory, Net	$ 92,346,000		$ 92,346,000		$ 90,185,000								$ 6,100,000		$ 6,100,000		$ 6,200,000