Supplemental Cash Flow Information - Summary of cash flow information discontinued operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Depreciation and amortization of real estate, in-place lease, and other intangibles	$ 553,949	$ 435,191	$ 404,681
Development, redevelopment, and other major improvements of real estate	791,566	626,904	503,643
Leasing costs, tenant improvements, and recurring capital expenditures	94,121	108,844	106,193
Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Depreciation and amortization of real estate, in-place lease, and other intangibles	143,194	224,798	144,819
Development, redevelopment, and other major improvements of real estate	30,769	74,919	62,995
Leasing costs, tenant improvements, and recurring capital expenditures	$ 12,695	$ 22,617	$ 1,705