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Commitments and Contingencies (Details)
$ in Millions
Sep. 30, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
Other Commitments [Line Items]    
Deferred Compensation Liability, Classified, Noncurrent | $ $ 13.1 $ 11.8
Number of Leased Properties Owned by Related Parties | property 2