Real Estate Investments and Related Intangibles - Investment in Unconsolidated Entities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) distributionCenter property	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($)	Oct. 30, 2020
Schedule of Equity Method Investments [Line Items]
Number of Properties | property	3,831
Carrying Amount of Investment	$ 58,813	$ 68,825
Equity in Income	3,009	2,618	$ 1,219
Carrying Amount of Investment	81,639	68,825
Total investment in unconsolidated entities	$ 81,639	68,825
Underlying equity in net assets		4,700
Cumulative preferred return rate	9.00%
Unconsolidated Joint Ventures debt outstanding		269,300
Outstanding balance	$ 5,913,065	5,705,725
Industrial Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	20.00%
Number of Properties | property	7
Carrying Amount of Investment	$ 45,378	28,409
Equity in Income	$ 838	254	0
Office Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	20.00%
Number of Properties | property	4
Carrying Amount of Investment	$ 13,435	0
Equity in Income	$ 534	$ 0	0
Faison JV Bethlehem GA, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	0.00%	90.00%
Number of Properties | property	0	1
Carrying Amount of Investment	$ 0	$ 40,416
Equity in Income	1,637	2,364	$ 1,219
Remaining ownership percentage				10.00%
Preferred equity [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount of Investment	$ 22,826	$ 0
Number of distribution center under development | distributionCenter	1
Unconsolidated Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Unconsolidated Joint Ventures debt outstanding	$ 550,500
Outstanding balance	$ 534,300
Unconsolidated Joint Ventures [Member] | Industrial Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated joint ventures | property	1
Total purchase price of assets acquired	$ 246,800
Unconsolidated Joint Ventures [Member] | Office Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated joint ventures | property	1
Total purchase price of assets acquired	$ 33,100
Unconsolidated Joint Ventures [Member] | Faison JV Bethlehem GA, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Gain on investment	500
Unconsolidated Joint Ventures [Member] | Preferred equity [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding balance	$ 16,200