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Fair Value Measurements (Details) (USD $)
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3 Months Ended | 6 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
Property
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Jun. 30, 2011
Property
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Jun. 30, 2012
Property
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Jun. 30, 2011
Property
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Jun. 30, 2012
Fair value, measurements, recurring
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Dec. 31, 2011
Fair value, measurements, recurring
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Jun. 30, 2012
Fair value, measurements, recurring
Quoted prices in active markets for identical assets (Level 1)
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Dec. 31, 2011
Fair value, measurements, recurring
Quoted prices in active markets for identical assets (Level 1)
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Jun. 30, 2012
Fair value, measurements, recurring
Significant other observable inputs (Level 2)
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Dec. 31, 2011
Fair value, measurements, recurring
Significant other observable inputs (Level 2)
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Jun. 30, 2012
Fair value, measurements, recurring
Significant unobservable inputs (Level 3)
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Dec. 31, 2011
Fair value, measurements, recurring
Significant unobservable inputs (Level 3)
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Jun. 30, 2012
Estimate of fair value
Significant other observable inputs (Level 2)
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Dec. 31, 2011
Estimate of fair value
Significant other observable inputs (Level 2)
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Jun. 30, 2012
Estimate of fair value
Significant unobservable inputs (Level 3)
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Jun. 30, 2012
Carrying value
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Dec. 31, 2011
Carrying value
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||||||||||||||
| Investment in real estate assets, net, carrying amount before impairment | $ 3,800,000 | ||||||||||||||||
| Number of properties impaired | 1 | 0 | 1 | 0 | |||||||||||||
| Investment in real estate assets | 1,751,000 | 0 | 0 | 1,751,000 | 1,800,000 | ||||||||||||
| Impairment of real estate assets | 1,979,000 | 0 | 1,979,000 | 0 | |||||||||||||
| Mortgage notes receivable | 86,600,000 | 85,300,000 | 75,100,000 | 76,700,000 | |||||||||||||
| Notes payable and line of credit | 1,800,000,000 | 1,800,000,000 | 1,700,000,000 | 1,800,000,000 | |||||||||||||
| Liabilities: | |||||||||||||||||
| Interest rate swaps | $ 2,770,000 | $ 3,558,000 | $ 0 | $ 0 | $ 2,770,000 | $ 3,558,000 | $ 0 | $ 0 | |||||||||