Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	12 Months Ended
	Dec. 31, 2019
Building | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	40 years
Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	10 years
Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years
Integral Equipment, Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years