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v3.20.2

Summary of Significant Accounting Policies (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2020 USD ($) engine | Sep. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Asset write-down |  | $ 14,400,000 | $ 11,300,000
Number of assets impaired | engine |  | 2 |
Contingencies related to COVID-19 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Percentage of workforce furloughed or subject to reduced compensation, COVID-19 | 13.00% | 13.00% |
Asset write-down | $ 0 | $ 500,000 |
Number of assets impaired | engine |  | 2 |
Reduction to revenue, rent concessions | $ 2,100,000 | $ 5,200,000 |

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