Schedule III Real Estate Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate and Accumulated Depreciation [Line Items]
Real Estate, Gross	$ 8,768,432	$ 7,851,278	$ 7,248,346
Real Estate, Other Acquisitions	595,719	410,003	205,390
Real Estate, Improvements	979,367	796,312	635,173
Real Estate, Cost of Real Estate Sold	(598,445)	(203,502)	(176,603)
Write Off of Fully Depreciated Assets	(130,949)	(85,659)	(61,028)
Real Estate, Gross	9,614,124	8,768,432	7,851,278
Total Land, Land Improvements, Buildings and Tenant Improvements Held-for-Sale	(170,685)	(72,754)	(23,401)
SEC Schedule III, Real Estate, Excluding Held-for-Sale	9,443,439	8,695,678	7,827,877
Real Estate Accumulated Depreciation	1,721,198	1,665,284	1,487,593	$ 1,345,060
Real Estate Accumulated Depreciation, Depreciation Expense	304,935	297,158	272,422
Real Estate Accumulated Depreciation, Real Estate Sold	(118,072)	(33,808)	(68,861)
Real Estate Accumulated Depreciation, Other Deductions	(130,949)	(85,659)	(61,028)
Schedule III - Accumulated Depreciation of Assets Held-for-Sale	(36,785)	(5,976)	(7,132)
Real Estate Investment Property, Accumulated Depreciation	1,684,413	1,659,308	1,480,461
Other real estate investments	11,002,600	9,863,886
Real Estate Assets	9,616,076	8,745,155	7,993,377
Real Estate Investments, Other	$ 172,637	$ 49,477	$ 165,500