Description Of Business And Segment Reporting (Reconciliation To Net Income Attributable To Common Shareholders) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Operating income (loss)	$ (1,301)	$ 5,693
Depreciation and amortization expense	(5,594)	(5,250)
General and administrative expense	(6,484)	(7,597)
Equity earnings of unconsolidated joint ventures	34	257
Other income (expense)	(20)	(82)
Income (loss) before income taxes	(3,139)	4,274
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	3,801	11,966
Unallocated Corporate Expense [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	(61)	(117)
General and administrative expense	(5,041)	(6,156)
Interest expense, net	$ (1,852)	$ (1,594)