Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Summary of future contractual minimum rental revenues required under non-cancellable operating leases for railcars
2014	$ 41,431
2015	40,686
2016	38,968
2017	30,620
2018	19,606
2019 and thereafter	33,561
Total	204,872
Lease Fleet Financing [Member]
Summary of future contractual minimum rental revenues required under non-cancellable operating leases for railcars
2014	24,892
2015	24,550
2016	23,761
2017	16,651
2018	9,023
2019 and thereafter	17,461
Total	$ 116,338