Noncontrolling Interests (Summary Of Changes In Controlling And Non-controlling Stockholders’ Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Noncontrolling Interest [Line Items]
Balance	$ 181,241
Net income	3,069	$ 3,041	[1]
Distributions to noncontrolling stockholders	(43)	(77)
Accumulated other comprehensive income (loss)	3	(13)	[1]
Balance	183,755
Controlling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Balance	176,910	142,197
Adjustments to opening retained earnings on adoption of ASC 606	194
Net income	3,047	3,029
Increase in additional paid in capital	339	169
Treasury stock purchased	(317)	(672)
Contributions from noncontrolling stockholders
Distributions to noncontrolling stockholders
Accumulated other comprehensive income (loss)	(750)	5,861
Balance	179,423	150,584
Noncontrolling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Balance	4,331	4,418
Adjustments to opening retained earnings on adoption of ASC 606	(2)
Net income	22	12
Increase in additional paid in capital
Treasury stock purchased
Contributions from noncontrolling stockholders	27	41
Distributions to noncontrolling stockholders	(43)	(77)
Accumulated other comprehensive income (loss)	(3)	13
Balance	4,332	4,407
Total Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Balance	181,241	146,615
Adjustments to opening retained earnings on adoption of ASC 606	192
Net income	3,069	3,041
Increase in additional paid in capital	339	169
Treasury stock purchased	(317)	(672)
Contributions from noncontrolling stockholders	27	41
Distributions to noncontrolling stockholders	(43)	(77)
Accumulated other comprehensive income (loss)	(753)	5,874
Balance	$ 183,755	$ 154,991

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