Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details 4)

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Fair Value Measurements (Details 4) (Properties on which impairment losses were recognized, USD $)
3 Months Ended
Mar. 31, 2012
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements  
Fair value on measurement date 92,176,000
Discounted cash flow
 
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements  
Discount rate 11.00%
Terminal capitalization rate 9.00%
Market rent growth rate 3.00%
Expense growth rate 3.00%
Yield Analysis
 
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements  
Yield 12.00%
Market rent rate 8.50%
Leasing costs per square foot 20.00