Mortgage Notes Payable, Net (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Real estate investment, at cost relating to notes payable	$ 900,000
Outstanding loan amount	1,255,877
Mortgages
Debt Instrument [Line Items]
Outstanding loan amount	$ 550,937	$ 537,533

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant