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Basis of Presentation and Summary of Significant Accounting Policies - Real Estate Capitalization and Depreciation (Details)	12 Months Ended
	Dec. 31, 2017
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Furniture, fixtures and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture, fixtures and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years

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- Definition

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- Definition

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.

+ References

No definition available.

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