Real Estate Owned (Details)	3 Months Ended
Mar. 31, 2013 Building sqft
Property, Plant And Equipment [Line Items]
Number of commercial office building owned	1
Area of office building (in square feet)	14,500
Useful life	39 years
Commercial Office Building [Member]
Property, Plant And Equipment [Line Items]
Area of office building utilized for executive offices (in square feet)	3,500

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