Major Tenants (Detail) - Major Tenants (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Major Tenants	$ 981,050	$ 979,607
Aggregate rent revenue of major tenants as a percentage of total rent revenue	72.00%	70.00%
Sterling Jewelers Inc
Major Tenants	298,178	286,707
Best Buy Stores LP
Major Tenants	256,000	256,001
CarMax Auto Superstores Inc
Major Tenants	146,286	146,612
Tractor Supply Company
Major Tenants	141,750	141,750
KinderCare Learning Centers LLC
Major Tenants	$ 138,836	$ 148,537

Amount of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 42

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 39

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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