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 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Summary of long lived real estate assets        
Impairments     $ 1,156 $ 1,254
Real Estate [Member] | Level 3 [Member]
       
Summary of long lived real estate assets        
Adjusted Basis of Long-Lived Real Estate Assets 9,399 12,556 11,688 13,949
Impairments 863 590 1,156 1,254
Initial Basis of Long-Lived Real Estate Assets $ 10,262 $ 13,146 $ 12,844 $ 15,203