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Investments In and Advances To Affiliates (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Development, management and leasing fees recognized from unconsolidated affiliates $ 0.4 $ 1.4 $ 0.8
Percentage of equity interest in joint ventures, maximum 50.00%    
Difference between cost of investments and the net book value of underlying net assets $ 0.6 0.7  
Receivables from management and leasing fees $ 0.1 $ 0.1  
Plaza Colonnade, Tenant-in-Common [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 50.00%    
Kessinger/Hunter & Company, LC [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 26.50%    
Highwoods DLF Forum, LLC Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 25.00%    
Highwoods DLF 98/29, LLC Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 22.80%    
Highwoods-Markel Associates, LLC Joint Venture [Member]      
Consolidated Affiliates:      
Percentage of equity interest in consolidated affiliates 50.00%    
Fair value of noncontrolling interests in consolidated affiliate $ 30.1