Noncontrolling Interests (Summary Of Changes In Controlling And Noncontrolling Stockholders' Equity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Noncontrolling Interest [Line Items]
Equity, beginning balance			$ 124,987	$ 112,639
Net income (loss)	396	290	510	15,657
Increase in additional paid in capital			548	305
Treasury stock purchased				(328)
Contributions from noncontrolling stockholders			3,350	163
Distributions to noncontrolling stockholders				(655)
Sale of noncontrolling interest				(148)
Accumulated other comprehensive income( loss)			4,700	(6,573)
Equity, ending balance	134,095	120,897	134,095	120,897
Controlling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Equity, beginning balance			123,752	111,787
Net income (loss)			361	14,990
Increase in additional paid in capital			548	142
Treasury stock purchased				(328)
Accumulated other comprehensive income( loss)			4,695	(6,569)
Equity, ending balance	129,356	120,022	129,356	120,022
Noncontrolling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Equity, beginning balance			1,235	852
Net income (loss)			149	667
Increase in additional paid in capital				163
Contributions from noncontrolling stockholders			3,350
Distributions to noncontrolling stockholders				(655)
Sale of noncontrolling interest				(148)
Accumulated other comprehensive income( loss)			5	(4)
Equity, ending balance	$ 4,739	$ 875	$ 4,739	$ 875