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Related Party Transactions - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Related Party Transactions [Abstract]      
Sale leaseback, number of properties | property 21    
Aggregate annual rental | $ $ 0.2 $ 1.2 $ 2.0