Schedule III: Real Estate and Accumulated Depreciation (Parenthetical) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Property		Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Number of industrial properties | Property	410
Tenant improvements, useful life	Lease Term
Balance, Beginning of Year	$ 4,109,896		$ 3,830,209	$ 3,673,644
Acquisition of Real Estate Assets	347,190		247,250	148,660
Construction Costs and Improvements	351,453		160,491	289,877
Disposition of Real Estate Assets	(139,207)		(109,070)	(258,639)
Write-off of Fully Depreciated and Other Assets	(22,888)		(18,984)	(23,333)
Balance, End of Year Including Real Estate Held for Sale	4,646,444		4,109,896	3,830,209
Real Estate Held for Sale	0	[1]	22,263	0
Balance, End of Year Excluding Real Estate Held for Sale	4,646,444		4,087,633	3,830,209
Balance, Beginning of Year	839,349		804,780	811,784
Depreciation for Year	107,876		102,533	98,333
Disposition of Assets	(58,055)		(49,390)	(82,919)
Write-off of Fully Depreciated and Other Assets	(20,874)		(18,574)	(22,418)
Balance, End of Year Including Real Estate Held for Sale	868,296		839,349	804,780
Real Estate Held for Sale	0	[2]	6,956	0
Balance, End of Year Excluding Real Estate Held for Sale	$ 868,296		832,393	$ 804,780
Real Estate Held for Sale - Other Assets			454
Real Estate Held for Sale - Other Assets Accumulated Depreciation			$ 98
Buildings and Improvements | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Property, plant and equipment, useful life	7 years
Buildings and Improvements | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Property, plant and equipment, useful life	50 years
Land Improvements | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Property, plant and equipment, useful life	3 years
Land Improvements | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Property, plant and equipment, useful life	16 years

[1] The Real Estate Held for Sale at December 31, 2020 excludes $454 of other assets.

[2] The Real Estate Held for Sale at December 31, 2020 excludes $98 of accumulated amortization related to the other assets.