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Real Estate (Impairments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Real Estate [Abstract] |  |  |  |
Impairment losses – real estate and other charges, net of recoveries | $ 3,835 | $ (39) | $ 6,083 | $ 1,167

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- Definition Impairment Losses and Other Charges, Net of Recoveries + References No definition available. + Details
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Balance Type: | debit
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration