Real Estate - Summary of Loss from Discontinued Operations (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
NON-OPERATING INCOME AND EXPENSES
INCOME FROM DISCONTINUED OPERATIONS	$ 0	$ 356,000	$ 0	$ 14,302,000
Impairment charges	0	0	0	(16,629,000)
Gain on sales	0	125,500,000	0	125,500,000
Total income from discontinued operations	0	125,856,000	0	123,173,000
Held-for-Sale | Grocery-Anchored Shopping Center
REVENUES
Rental revenues	0	1,340,000	0	44,130,000
Other revenues	0	26,000	0	184,000
Total revenues	0	1,366,000	0	44,314,000
EXPENSES
Operating, maintenance and management	0	321,000	0	9,557,000
Real estate and other property-related taxes	0	216,000	0	6,750,000
Corporate general and administrative	0	0	0	468,000
Depreciation and amortization	0	0	0	9,726,000
Total expenses	0	537,000	0	26,501,000
OPERATING INCOME	0	829,000	0	17,813,000
NON-OPERATING INCOME AND EXPENSES
Interest expense, net	0	(473,000)	0	(3,511,000)
Total non-operating income and expenses	0	(473,000)	0	(3,511,000)
INCOME FROM DISCONTINUED OPERATIONS	0	356,000	0	14,302,000
Impairment charges	0	0	0	(16,629,000)
Gain on sales	0	125,500,000	0	125,500,000
Total income from discontinued operations	$ 0	$ 125,856,000	$ 0	$ 123,173,000