Subsequent Events (Details) (Net Lease Asset, USD $)	12 Months Ended	1 Months Ended
Dec. 31, 2013	Feb. 28, 2014 Subsequent Event	Feb. 28, 2014 Maximum Subsequent Event
Subsequent Event [Line Items]
Partners' Capital Account, Contributions		$ 500,000,000
Total Venture Investments			1,250,000,000.00
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest		52.00%
Asset Acquisition, Purchase Price	$ 93,600,000

Total contributions made by each class of partners (i.e., general, limited and preferred partners).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Name:	us-gaap_PartnersCapitalAccountContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration