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Fair Value Measurements (Details 3) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Assets and liabilities measured at fair value on a non-recurring basis |  |  |
Assets held for sale, net | $ 41,391 |  | $ 94,654
Impairment losses | 0 | $ 2,446 |
Assets held for sale, net |  |  |
Assets and liabilities measured at fair value on a non-recurring basis |  |  |
Assets held for sale, net | $ 41,391 |  | $ 94,654

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