Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
Taxable income minimum distribution portion not subject to federal taxation (in percentage)	90.00%
Real estate improvements	$ 12,500,000	$ 11,800,000
Acquisition costs	0	$ 0
Allowance for doubtful accounts receivable	$ 8,900,000		$ 8,200,000
Number of segments | segment	1
Minimum | Building
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	39 years
Minimum | Building Improvements
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	10 years
Minimum | Furniture and Fixtures
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	3 years
Maximum | Building
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	40 years
Maximum | Building Improvements
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	20 years
Maximum | Furniture and Fixtures
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	10 years