Summary of Significant Accounting Policies (Useful Lives of Real Estate) (Details)	12 Months Ended
Dec. 31, 2019
Furniture and Fixtures
Property, Plant and Equipment
Estimated useful life	10 years
Electrical and Mechanical Installations \| Minimum
Property, Plant and Equipment
Estimated useful life	15 years
Electrical and Mechanical Installations \| Maximum
Property, Plant and Equipment
Estimated useful life	20 years
Building
Property, Plant and Equipment
Estimated useful life	40 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