Intangible Assets and Liabilities - Amortization of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands		12 Months Ended
Dec. 31, 2019	Dec. 31, 2020	Dec. 22, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization:	$ 63	$ 4,729	$ 2,032
Net adjustment to rental revenue:
Below-market lease liabilities	11	1,064	403
Net adjustment to rental revenue	(2)	504	(563)
In-place leases
Finite-Lived Intangible Assets [Line Items]
Amortization:	56	4,437	2,032
Assembled workforce
Finite-Lived Intangible Assets [Line Items]
Amortization:	7	292	0
Above-market leases
Net adjustment to rental revenue:
Above-market lease assets	$ (13)	$ (560)	$ (966)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration