Real Estate Investments and Related Intangibles - Investment in Unconsolidated Entities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) property distributionCenter	Jun. 30, 2020 USD ($) property	Dec. 31, 2020 USD ($) distributionCenter	Oct. 30, 2020
Schedule of Equity Method Investments [Line Items]
Number of Properties | property	3,885
Carrying Amount of Investment	$ 57,661		$ 58,813
Equity in Income	911	$ 1,743
Carrying Amount of Investment	80,487		81,639
Total investment in unconsolidated entities	$ 80,487		81,639
Cumulative preferred return rate	9.00%
Industrial Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	20.00%
Number of Properties | property	7
Carrying Amount of Investment	$ 42,697		45,378
Equity in Income	$ 501	347
Office Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	20.00%
Number of Properties | property	5
Carrying Amount of Investment	$ 14,964		13,435
Equity in Income	$ 410	$ 199
Number of unconsolidated joint ventures | property	1
Total purchase price of assets acquired	$ 26,400
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		0
Equity in Income	0	$ 1,197
Remaining ownership percentage				10.00%
Preferred equity [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount of Investment	$ 22,826		$ 22,826
Number of distribution center under development | distributionCenter	1		1
Unconsolidated Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding balance	$ 652,600		$ 550,500