Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Summary of Significant Accounting Policies [Line Items]
Tenant Purchase Requirement, Minimum	$ 10,710
Tenant Purchase Requirement Maximum	11,550
Required Tenant Purchase Price	$ 10,710
Building and Building Improvements [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Land and Equipment, Useful Life, Maximum (in years)	40

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration