Investments in Equipment and Leases (Schedule of Useful Lives of Assets) (Details)	12 Months Ended
Dec. 31, 2014
Maximum [Member] \| Transportation [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Useful lives of lease assets	40 years
Maximum [Member] \| Materials Handling [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Useful lives of lease assets	10 years
Minimum [Member] \| Transportation [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Useful lives of lease assets	35 years
Minimum [Member] \| Materials Handling [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Useful lives of lease assets	7 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration