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Fair Value - Carrying Value of Assets (Detail) - Non-recurring - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Real estate |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | $ 0 | $ 641
Real estate | Level 1 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 0
Real estate | Level 2 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 0
Real estate | Level 3 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 641
Discontinued Operations |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 57,219
Discontinued Operations | Level 1 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 0
Discontinued Operations | Level 2 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | 0 | 0
Discontinued Operations | Level 3 |  |
Non-Financial Assets and Liabilities: |  |
Assets, fair value disclosure, nonrecurring | $ 0 | $ 57,219

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- Definition Non Financial Assets And Liabilities At Fair Value [Abstract] + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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