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Properties, Plant and Equipment - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Property, Plant and Equipment [Line Items]        
Depreciation expense $ 0.8 $ 0.4 $ 1.1 $ 1.1
Daney Ranch And Golden Hill Hotel        
Property, Plant and Equipment [Line Items]        
Resumed depreciation $ 0.7