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Property Held for Sale - Additional Information (Details) - USD ($)
$ in Millions
Aug. 01, 2019
Jun. 30, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]    
Carrying value of property reclassified to property held for sale   $ 1.4
Subsequent Event | Gessner Road, Houston, Texas [Member]    
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]    
Sale of real property for cash price $ 8.6