Significant Accounting Policies (Details)	3 Months Ended
Mar. 31, 2013
Building [Member]
Property, Plant and Equipment, Useful Life	40 years
Minimum [Member] \| Building Improvements [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] \| Building Improvements [Member]
Property, Plant and Equipment, Useful Life	25 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