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Fair Value Measurements (Details 3) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | |||||||||
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Sep. 30, 2013
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Sep. 30, 2012
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Discounted Cash Flow Valuation Technique [Member]
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| Quantitative information for significant unobservable inputs used for Level 3 fair value measurements | ||||||||||
| Discount rate | 10.90% | 10.40% | ||||||||
| Terminal capitalization rate | 9.70% | 8.90% | ||||||||
| Market rent growth rate | 3.00% | [1] | 3.00% | [1] | ||||||
| Expense growth rate | 3.00% | [1] | 3.00% | [1] | ||||||
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Discounted Cash Flow Valuation Technique [Member] | Minimum
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| Quantitative information for significant unobservable inputs used for Level 3 fair value measurements | ||||||||||
| Discount rate | 10.00% | 10.10% | ||||||||
| Terminal capitalization rate | 9.50% | 8.70% | ||||||||
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Discounted Cash Flow Valuation Technique [Member] | Maximum
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| Quantitative information for significant unobservable inputs used for Level 3 fair value measurements | ||||||||||
| Discount rate | 11.00% | 11.00% | ||||||||
| Terminal capitalization rate | 10.00% | 10.00% | ||||||||
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Yield Analysis Valuation Technique [Member]
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| Quantitative information for significant unobservable inputs used for Level 3 fair value measurements | ||||||||||
| Yield | 12.00% | [1] | ||||||||
| Market rent rate (in dollars per square foot) | 8.50 | [1] | ||||||||
| Leasing costs (in dollars per square foot) | 20.00 | [1] | ||||||||
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Fair value measurement on a nonrecurring basis | Significant Unobservable Inputs (Level 3) | Properties,net
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| Quantitative information for significant unobservable inputs used for Level 3 fair value measurements | ||||||||||
| Fair value on measurement date | $ 245,535 | [2],[3] | $ 369,312 | [2],[3] | ||||||
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