Mortgage Notes Payable, Net (Mortgage Notes) (Details)	Mar. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Outstanding loan amount	$ 1,093,509,000
Effective interest rate	3.06%	3.00%
Mortgages
Debt Instrument [Line Items]
Encumbered Properties \| property	76
Outstanding loan amount	$ 588,854,000	$ 591,841,000
Effective interest rate	3.82%	3.82%
Deferred financing costs	$ (5,835,000)	$ (6,186,000)
Mortgage premiums and discounts, net	(1,308,000)	(1,416,000)
Mortgage notes payable, net	$ 581,711,000	584,239,000
Mortgages \| Capital One MOB Loan
Debt Instrument [Line Items]
Encumbered Properties \| property	41
Outstanding loan amount	$ 378,500,000	$ 378,500,000	$ 250,000,000
Effective interest rate	3.71%	3.71%
Mortgages \| Multi-Property CMBS Loan
Debt Instrument [Line Items]
Encumbered Properties \| property	21
Outstanding loan amount	$ 118,700,000	$ 118,700,000
Effective interest rate	4.60%	4.60%
Mortgages \| Shiloh - Illinois
Debt Instrument [Line Items]
Encumbered Properties \| property	1
Outstanding loan amount	$ 13,305,000	$ 13,384,000
Effective interest rate	4.34%	4.34%
Mortgages \| BMO CMBS Loan
Debt Instrument [Line Items]
Encumbered Properties \| property	9
Outstanding loan amount	$ 42,750,000	$ 42,750,000
Effective interest rate	2.89%	2.89%
Mortgages \| Palm Valley Medical Plaza - Goodyear, AZ (4)
Debt Instrument [Line Items]
Encumbered Properties \| property	1
Outstanding loan amount	$ 2,848,000	$ 2,879,000
Effective interest rate	4.15%	4.15%
Mortgages \| Medical Center V - Peoria, AZ
Debt Instrument [Line Items]
Encumbered Properties \| property	0
Outstanding loan amount	$ 0	$ 2,684,000
Effective interest rate	0.00%	4.75%
Mortgages \| Fox Ridge Bryant - Bryant, AR
Debt Instrument [Line Items]
Encumbered Properties \| property	1
Outstanding loan amount	$ 6,937,000	$ 6,977,000
Effective interest rate	3.98%	3.98%
Mortgages \| Fox Ridge Chenal - Little Rock, AR
Debt Instrument [Line Items]
Encumbered Properties \| property	1
Outstanding loan amount	$ 15,930,000	$ 16,024,000
Effective interest rate	2.95%	2.95%
Mortgages \| Fox Ridge North Little Rock - North Little Rock, AR
Debt Instrument [Line Items]
Encumbered Properties \| property	1
Outstanding loan amount	$ 9,884,000	$ 9,943,000
Effective interest rate	2.95%	3.95%

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