Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Related Party Transaction [Line Items]
Rental revenue	$ 10,194	$ 11,565	$ 20,555	$ 23,007
Property operating expenses	5,058	5,810	10,890	12,119
General and administrative	5,866	1,669	9,101	5,961
Advisory fee to related party	5,739	2,353	8,175	4,726
Interest income	5,616	5,284	11,260	11,038
Interest expense	7,681	9,071	15,419	18,673
Affiliate
Related Party Transaction [Line Items]
Rental revenue	313	280	555	546
Property operating expenses	195	254	577	496
General and administrative	747	765	2,417	1,898
Interest income	5,062	5,129	9,831	9,755
Interest expense	1,373	1,543	2,768	3,458
Affiliate \| Pillar and Regis
Related Party Transaction [Line Items]
Rental revenue	313	280	555	546
Affiliate \| Regis
Related Party Transaction [Line Items]
Property operating expenses	195	254	577	496
Affiliate \| Pillar
Related Party Transaction [Line Items]
General and administrative	747	765	2,417	1,898
Advisory fee to related party	5,739	2,353	8,175	4,726
Interest expense	1,373	1,543	2,768	3,458
Affiliate \| UHF and Pillar
Related Party Transaction [Line Items]
Interest income	$ 5,062	$ 5,129	$ 9,831	$ 9,755
ARL \| Affiliate \| MRHI
Related Party Transaction [Line Items]
Ownership interest	90.80%		90.80%

The amount of advisory fees to related parties, during the period.

No definition available.

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- Definition

Amount of expense incurred and directly related to generating revenue by lessor from operating lease of rented property and equipment.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

+ Details

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

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Balance Type:	debit
Period Type:	duration

- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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