Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Ownership percentage (in hundredths)	80.00%
Reduction in depreciation expense due to change in residual values and estimated useful lives		$ 9,500,000
Increase in pre tax income due to change in residual values and estimated useful lives		9,500,000
Increase in net income		8,300,000
Increase in diluted earnings per share (in dollars per share)		$ 0.41
Percentage of reserve on receivables overdue one to thirty days (in hundredths)	1.00%
Minimum period for general reserve with specific minimum percentage	1 day
Maximum period for general reserve with specific minimum percentage	30 days
Percentage of reserve on receivables overdue one year (in hundredths)	100.00%
Maximum period for general reserve with specific maximum percentage	1 year
Minimum percentage realization for recognition of income tax position (in hundredths)	50.00%
Minimum lease term	1 year
Maximum lease term	8 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Depreciable life (in years)	5 years
Residual Value	0
Minimum [Member] | Other Specialized Containers [Member]
Property, Plant and Equipment [Line Items]
Depreciable life (in years)	12 years 6 months
Residual Value	1,000
Minimum [Member] | Railcar Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciable life (in years)	40 years
Maximum [Member] | Other Specialized Containers [Member]
Property, Plant and Equipment [Line Items]
Depreciable life (in years)	15 years
Residual Value	$ 3,500
Maximum [Member] | Railcar Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciable life (in years)	43 years