Debt Narrative - Senior Unsecured Notes and Secured Term Loan Facility - Railcar (Details) (USD $)	12 Months Ended			1 Months Ended		12 Months Ended				12 Months Ended			12 Months Ended			1 Months Ended	0 Months Ended	1 Months Ended									0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 31, 2013 Railcar Segment [Member]	Sep. 30, 2012 Railcar Segment [Member]	Dec. 31, 2013 Railcar Segment [Member]	Dec. 31, 2012 Railcar Segment [Member]	Dec. 31, 2011 Railcar Segment [Member]	Feb. 28, 2007 Railcar Segment [Member] Senior unsecured notes [Member]	Dec. 31, 2013 Railcar Segment [Member] Term Loan [Member]	Dec. 31, 2012 Railcar Segment [Member] Term Loan [Member]	Dec. 01, 2012 Railcar Segment [Member] Term Loan [Member]	Dec. 31, 2013 Loss on extinguishment of debt	Dec. 31, 2012 Loss on extinguishment of debt	Dec. 31, 2011 Loss on extinguishment of debt	Sep. 30, 2012 Loss on extinguishment of debt Railcar Segment [Member]	Oct. 02, 2013 New ARL [Member] [Member] Railcar Segment [Member]	Feb. 28, 2014 New ARL [Member] [Member] Railcar Segment [Member]	Jan. 31, 2014 New ARL [Member] [Member] Railcar Segment [Member]	Dec. 31, 2013 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Jul. 12, 2013 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Dec. 31, 2012 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Jun. 08, 2011 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Jan. 04, 2011 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Oct. 09, 2009 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Feb. 02, 2006 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member]	Dec. 12, 2013 Class A-2 Notes [Member] Railcar Segment [Member] Term Loan [Member]	Dec. 12, 2013 Class A-1 Notes [Member] Railcar Segment [Member] Term Loan [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued, long-term debt									$ 275,000,000										$ 385,000,000	$ 47,000,000		$ 58,000,000
Future debt expected to be incurred by new capitalized entity																	381,000,000	381,000,000
Proceeds from Issuance of Long-term Debt																											106,000,000	110,000,000
Draw on term loan, initial draw												98,000,000
Gross proceeds from sale of senior unsecured notes										100,000,000
Long-term Debt										196,000,000	100,000,000
Debt Instrument, Basis Spread on Variable Rate										2.50%
Real estate assets pledged to collateralize mortgages										217,000,000	112,000,000
Line of credit facility																				126,000,000	120,000,000	115,000,000	130,000,000	110,000,000	43,000,000	40,000,000
Repayments of debt				175,000,000	100,000,000
Other (loss) income, net	$ 21,000,000	$ (175,000,000)	$ (72,000,000)			$ (6,000,000)	$ 0	$ (2,000,000)					$ 0	$ (10,000,000)	$ 0	$ (2,000,000)