Description Of Business And Segment Reporting (Reconciliation To Net Income Attributable To Common Shareholders) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Segment operating income (loss)	$ 1,019	$ (6,731)	$ (5,073)	$ (20,080)
Depreciation and amortization expense	(4,580)	(5,010)	(13,908)	(15,781)
General and administrative expense	(5,405)	(5,257)	(15,693)	(17,364)
Equity earnings of unconsolidated joint ventures	217	61	443	233
Gain (loss) on sale of assets		(59)		(59)
Other income (expense)	267	5,455	356	8,445
Income (loss) before income taxes	(3,569)	(4,967)	(18,337)	(21,703)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment operating income (loss)	5,315	(2,282)	7,468	(6,027)
Unallocated Corporate Expense [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	(172)	(258)	(527)	(804)
General and administrative expense	(4,124)	(4,190)	(12,014)	(13,249)
Interest expense, net	$ (5,072)	$ (3,694)	$ (14,063)	$ (10,242)