Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation - Change in Balance of Accumulated Depreciation 2 (Detail)

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Schedule III - Real Estate and Accumulated Depreciation - Change in Balance of Accumulated Depreciation 2 (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Real Estate Held for Sale [Member]    
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]    
Real estate held for sale, accumulated depreciation $ 2,668 $ 846