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Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Equity in loss of Real Estate Ventures |  | $ (5,723) | $ (7,254) | $ (5,387) | $ (9,323)
Unconsolidated Real Estate Ventures [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Revenue |  | 56,511 | 57,710 | 169,609 | 157,641
Operating expenses |  | (27,419) | (27,592) | (77,757) | (81,347)
Provision for impairment |  |  | (10,476) |  | (10,476)
Interest expense, net |  | (11,670) | (12,102) | (33,771) | (32,019)
Depreciation and amortization |  | (20,684) | (22,722) | (61,816) | (63,125)
Net loss | [1] | (3,262) | (15,182) | (3,735) | (29,326)
Equity in loss of Real Estate Ventures | [2] | $ (5,723) | $ (7,254) | $ (5,387) | $ (9,323)
[1] | The nine-month period ended September 30, 2016 amount includes $7.1 million of acquisition deal costs related to the formation of the MAP Venture.
[2] | The three- and nine-month periods ended September 30, 2017 include a $4.8 million other than temporary impairment charge related to the BDN-AI Venture that was recorded during the three months ended September 30, 2017.

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