Investments in Non-Consolidated Entities - Schedule of Operation Results of Nonconsolidated Investee (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]
Total gross revenues	$ 80,278	$ 92,557
General and administrative	(10,737)	(8,420)
Gains on sales of properties	255	21,919
Interest expense	(10,682)	(11,486)
Provision for income taxes	(417)	(372)
Net income	10,908	41,475
NNN Office Joint Venture
Schedule of Equity Method Investments [Line Items]
Total gross revenues	14,391	15,186
Depreciation expense	(7,958)	(9,685)
Property operating	(2,412)	(2,345)
General and administrative	(558)	(566)
Gains on sales of properties	56,576	0
Interest expense	(2,532)	(2,981)
Income from continuing operations	57,507	(391)
Provision for income taxes	(250)	(26)
Net income	$ 57,257	$ (417)