Segment Reporting (Summary of Net Operating Income (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Aug. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement [Line Items]
Straight-line rental income and expense, net					$ 22,985	$ 15,660
Equity in earnings of unconsolidated joint ventures			$ 2,966	$ 4,023	29,824	8,958
Interest expense			(20,003)	(23,059)	(63,582)	(69,394)
Depreciation and amortization expense			(88,033)	(88,596)	(273,335)	(260,659)
Gain on sale of properties			439,212	10,968	555,755	19,905
Impairment charges			0	0	0	(5,626)
Interest and other income, net			1,433	32	3,569	1,643
General and administrative expenses			(14,152)	(11,439)	(54,248)	(46,808)
Gain on land sales			1,653	2,346	12,791	8,551
Other operating expenses			(1,290)	(1,772)	(2,773)	(4,430)
Loss on extinguishment of debt	$ (13,900)	$ (3,900)	(13,893)	(120)	(17,901)	(32,898)
Gain on involuntary conversion			0	3,029	3,222	4,312
Non-incremental costs related to successful leases			(3,334)	(4,058)	(10,319)	(10,617)
Income from continuing operations before income taxes			506,146	71,520	772,862	131,119
Operating Segments [Member]
Statement [Line Items]
Property Level Net Operating Income – Cash Basis			181,087	157,151	524,260	453,382
Property Level Net Income, Cash Basis, Continuing Operations			185,101	169,320	548,689	489,608
Operating Segments [Member] | Industrial Operations
Statement [Line Items]
Property Level Net Operating Income – Cash Basis			179,969	156,059	520,639	449,418
Operating Segments [Member] | All Other Segments [Member]
Statement [Line Items]
Property Level Net Operating Income – Cash Basis			1,118	1,092	3,621	3,964
Operating Segments [Member] | Service Operations [Member]
Statement [Line Items]
Earnings from Service Operations			4,510	2,033	9,815	4,810
Segment Reconciling Items [Member]
Statement [Line Items]
PNOI from sold properties included in continuing operations			4,014	12,169	24,429	36,226
Straight-line rental income and expense, net			8,488	7,184	22,985	15,660
Revenues Related to Lease Buyouts			0	179	310	2,605
Amortization of lease concessions and above and below market rents			4,081	1,746	9,522	5,843
Intercompany rents and other adjusting items			(765)	(624)	(1,881)	(999)
Corporate, Non-Segment [Member]
Statement [Line Items]
Equity in earnings of unconsolidated joint ventures			2,966	4,023	29,824	8,958
Interest expense			(20,003)	(23,059)	(63,582)	(69,394)
Depreciation and amortization expense			(88,033)	(88,596)	(273,335)	(260,659)
Gain on sale of properties			439,212	10,968	555,755	19,905
Impairment charges			0	0	0	(5,626)
Interest and other income, net			1,433	32	3,569	1,643
General and administrative expenses			(14,152)	(11,439)	(54,248)	(46,808)
Gain on land sales			1,653	2,346	12,791	8,551
Other operating expenses			(1,290)	(1,772)	(2,773)	(4,430)
Loss on extinguishment of debt			(13,893)	(120)	(17,901)	(32,898)
Gain on involuntary conversion			0	3,029	3,222	4,312
Non-incremental costs related to successful leases			(3,334)	(4,058)	(10,319)	(10,617)
Other non-segment revenues and expenses, net			$ 172	$ 328	$ 419	$ 655