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Description of Business and Basis of Presentation - Description of Business (Details)
ft² in Thousands
12 Months Ended
Dec. 31, 2021
ft²
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Distribution of taxable income to qualify as REIT, percentage 100.00%
Company's portfolio of real estate assets - Office space (square feet) 18,300
Company's portfolio of real estate assets - Retail space (square feet) 620
Cousins Properties LP  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Percentage of partnership units owned by the Company 99.00%