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Intangibles - Estimated Aggregate Amortization of Intangible Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Estimated aggregate amortization of Intangible Assets    
Intangible assets, net $ 519,917 $ 260,204
Rental and Related Revenues    
Estimated aggregate amortization of Intangible Assets    
2021 18,093  
2022 17,841  
2023 17,119  
2024 16,159  
2025 15,370  
Thereafter 50,514  
Intangible assets, net 135,096  
Depreciation and Amortization    
Estimated aggregate amortization of Intangible Assets    
2021 96,094  
2022 89,217  
2023 85,484  
2024 82,647  
2025 72,373  
Thereafter 84,999  
Intangible assets, net $ 510,814