Revenue Concentration (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Ten Largest Container Lessees [Member] | Equipment Leasing [Member]
Concentration Risk [Line Items]
Number of major customers	10
Single Largest Container Lessee [Member] | Equipment Leasing [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	11.60%	12.60%	11.30%
Concentration of risk, amount	$ 23.8	$ 20.3	$ 12.5
Five Investment Arrangers [Member] | Container Management [Member]
Concentration Risk [Line Items]
Number of major customers	5
Two Largest Container Investors [Member] | Container Management [Member]
Concentration Risk [Line Items]
Number of major customers	2
Revenue [Member] | Equipment Leasing [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	11.20%	11.70%	9.90%
Revenue [Member] | Container Management [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	1.90%
Revenue [Member] | Ten Largest Container Lessees [Member] | Equipment Leasing [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	58.80%	58.50%	57.60%
Revenue [Member] | Five Investment Arrangers [Member] | Container Management [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	76.30%	62.60%	65.40%
Revenue [Member] | Two Largest Container Investors [Member] | Container Management [Member]
Concentration Risk [Line Items]
Concentration of risk (in hundredths)	51.50%
Concentration of risk, amount	$ 4.0