Concentration of Credit Risk and Major Customers (Schedule of Leasing and Lending Revenues) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Transportation, Containers [Member] | Equipment Cost [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	32.00%	38.00%
Transportation, Rail [Member] | Equipment Cost [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	64.00%	58.00%
Transportation, Rail [Member] | Interstate Commodities, Inc. [Member] | Operating Revenues [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	21.00%	20.00%
Transportation, Other [Member] | Exsif Worldwide Inc. [Member] | Operating Revenues [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	22.00%	26.00%