Noncontrolling Interests (Summary Of Changes In Controlling And Noncontrolling Stockholders' Equity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Noncontrolling Interest [Line Items]
Equity, beginning balance			$ 124,987	$ 112,639
Net income (loss)	224	17,613	113	15,366
Increase in additional paid in capital			521	94
Treasury stock purchased				(111)
Contributions from noncontrolling stockholders			3,275
Distributions to noncontrolling stockholders				(554)
Sale of noncontrolling interest				(148)
Accumulated other comprehensive income loss, Noncontrolling Interests			934	11,685
Equity, ending balance	129,830	138,971	129,830	138,971
Controlling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Equity, beginning balance			123,752	111,787
Net income (loss)			(3)	14,952
Increase in additional paid in capital			521	94
Treasury stock purchased				(111)
Accumulated other comprehensive income loss, Noncontrolling Interests			938	11,661
Equity, ending balance	125,208	138,383	125,208	138,383
Noncontrolling Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Equity, beginning balance			1,235	852
Net income (loss)			116	414
Contributions from noncontrolling stockholders			3,275
Distributions to noncontrolling stockholders				(554)
Sale of noncontrolling interest				(148)
Accumulated other comprehensive income loss, Noncontrolling Interests			(4)	24
Equity, ending balance	$ 4,622	$ 588	$ 4,622	$ 588