Description Of Business And Segment Reporting (Reconciliation To Net Income Attributable To Common Shareholders) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Operating income	$ 5,643	$ 5,528	[1]
Depreciation and amortization expense	(5,250)	(3,934)	[1]
General and administrative expense	(7,597)	(6,174)	[1]
Interest expense, net	(1,594)	(1,860)	[1]
Income tax benefit (expense)	(1,155)	(1,703)	[1]
Equity earnings of unconsolidated joint ventures	257	255	[1]
Other income (expense)	(82)	821	[1]
Income before income taxes	4,224	4,744	[1]
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	11,916	10,387
Corporate, Non-segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	(117)	(106)
General and administrative expense	(6,156)	(4,753)
Interest expense, net	$ 1,594	$ 1,860

[1] Certain prior year balances have been reclassified to conform to the 2018 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).