Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies (Redeemable Noncontrolling Interest) (Details)

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Summary Of Significant Accounting Policies (Redeemable Noncontrolling Interest) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]      
Beginning balance noncontrolling redeemable Operating Partnership Units $ 12,480 $ 15,005  
Redemption of Operating Partnership Units   (2,894)  
Redemption value in excess of carrying value   1,121  
Net income attributable to noncontrolling interests - consolidated joint venture 370 539  
Distributions (611) (671)  
Adjustment to redemption value 2,227 (620) 156
Ending balance noncontrolling redeemable Operating Partnership Units $ 14,466 $ 12,480 $ 15,005