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Schedule III - Real Estate and Accumulated Depreciation (Changes in Total Real Estate Assets and Accumulated Depreciation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule III - Real Estate and Accumulated Depreciation [Abstract]      
Balance, beginning of period $ 9,553,177 $ 9,115,793 $ 8,328,475
Acquisition of operating properties and unconsolidated joint ventures 607,099 0 422,309
Development and repositions 346,173 349,890 341,236
Improvements 87,297 87,865 75,360
Cost of real estate sold – other (144,679) (371) (51,587)
Balance, end of period 10,449,067 9,553,177 9,115,793
Balance, Beginning of period 3,034,186 2,686,025 2,403,149
Depreciation of real estate assets 387,432 348,161 317,026
Dispositions (63,591) 0 (34,150)
Balance, End of period 3,358,027 $ 3,034,186 $ 2,686,025
Real Estate, Federal Income Tax Basis $ 9,500,000