Real Estate (Summary of Income from Discontinued Operations) (Details)	3 Months Ended
	Mar. 31, 2022 USD ($)
REVENUES
Rental revenues	$ 21,648,000
Other revenues	56,000
Total revenues	21,704,000
EXPENSES
Operating, maintenance and management	4,850,000
Real estate and other property-related taxes	3,255,000
General and administrative	60,000
Depreciation and amortization	5,762,000
Total expenses	13,927,000
OPERATING INCOME	7,777,000
NON-OPERATING INCOME AND EXPENSES
Interest expense, net	(1,529,000)
Total non-operating income and expenses	(1,529,000)
INCOME FROM DISCONTINUED OPERATIONS	6,248,000
Impairment charges	(510,000)
Total income from discontinued operations	$ 5,738,000