Investments in Non-Consolidated Entities - Schedule of Operation Results of Nonconsolidated Investee (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Total gross revenues	$ 79,775	$ 81,541	$ 160,053	$ 174,098
General and administrative	(9,296)	(7,912)	(20,033)	(16,332)
Gains on sales of properties	27,855	66,726	28,110	88,645
Impairment charges	(1,829)	0	(1,829)	0
Interest expense	(10,821)	(11,474)	(21,503)	(22,960)
Provision for income taxes	(263)	(344)	(680)	(716)
Net income	$ 41,538	$ 73,787	52,446	115,262
NNN Office Joint Venture
Schedule of Equity Method Investments [Line Items]
Total gross revenues			27,070	30,418
Depreciation expense			(14,392)	(19,375)
Property operating			(4,880)	(4,689)
General and administrative			(1,108)	(1,101)
Gains on sales of properties			114,481	0
Impairment charges			(21,067)	0
Debt satisfaction losses, net			(7,474)	0
Interest expense			(4,869)	(5,981)
Income (loss) from continuing operations			87,761	(728)
Provision for income taxes			(273)	(53)
Net income			$ 87,488	$ (781)