Quarterly report pursuant to Section 13 or 15(d)

Fair Value Disclosures (Details)

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Fair Value Disclosures (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
Summary of long lived real estate assets        
Impairments     $ 1,573 $ 2,301
Real Estate [Member] | Level 3 [Member]
        
Summary of long lived real estate assets        
Adjusted Basis of Long-Lived Real Estate Assets 5,510 [1] 19,559 [1],[2] 10,491 [1] 28,149 [1],[2]
Impairments 417 1,047 1,573 2,301
Initial Basis of Long-Lived Real Estate Assets $ 5,927 $ 20,606 $ 12,064 $ 30,450
[1] The fair values in the table above represent only those real estate assets whose carrying values were adjusted in the respective period.
[2] The carrying values for these real-estate assets may have subsequently increased or decreased from the fair value reported due to activities that have occurred since the measurement date.