Summary of Significant Accounting Policies (Details) - COVID-19 - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
ASC 842 reserve, rental revenue	$ 330	$ 5,716	$ 1,361	$ 7,219
Total impact	(1,310)	8,534	(878)	11,615
Collectibility of receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
ASC 450 reserve, provision for (recovery of) doubtful accounts	$ (1,640)	$ 2,818	$ (2,239)	$ 4,396

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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