Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	Feb. 25, 2014 Depositary units [Member]	Jul. 31, 2014 Depositary units [Member] Limited partners	May 05, 2014 Depositary units [Member] Limited partners	Oct. 31, 2014 Dividend Declared [Member] Depositary units [Member] Limited partners	Oct. 06, 2014 ARI Term Loan Facility [Member] ARI [Member] Railcar Segment [Member] Proceeds from debt [Member]
Subsequent Event [Line Items]
Distribution declared per depositary unit	$ 1.50	$ 1.50	$ 1.50	$ 1.50
Term Loan Facility					$ 100