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Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Assets and liabilities measured at fair value on a non-recurring basis |  |  |  |  |  |  |  |
Impairment losses (recoveries) | $ 1,302 |  | $ 0 |  | $ 1,302 |  | $ 0 |
Fair value measurement on a nonrecurring basis | Properties,net |  |  |  |  |  |  |  |
Assets and liabilities measured at fair value on a non-recurring basis |  |  |  |  |  |  |  |
Impairment losses (recoveries) | 1,328 | [1] | 7,195 | [1] | 1,329 | [1] | 9,052 | [1]
Fair value measurement on a nonrecurring basis | Properties,net | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |  |
Assets and liabilities measured at fair value on a non-recurring basis |  |  |  |  |  |  |  |
Assets | 9,796 | [1] | 99,240 | [1] | 9,796 | [1] | 99,240 | [1]
Fair value measurement on a nonrecurring basis | Properties,net | Total Estimated Fair Value |  |  |  |  |  |  |  |
Assets and liabilities measured at fair value on a non-recurring basis |  |  |  |  |  |  |  |
Assets | $ 9,796 | [1] | $ 99,240 | [1] | $ 9,796 | [1] | $ 99,240 | [1]
[1] | Reflects balance sheet classifications of assets at time of fair value measurement, excluding the effect of held for sale classifications.

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