Summary of Significant Accounting Policies (Details) - Contingencies related to COVID-19 - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Percentage of workforce furloughed or subject to reduced compensation, COVID-19					9.00%
Reduction to revenue, rent concessions	$ 0.3	$ 2.1	$ 0.5	$ 5.2

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.

No definition available.

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