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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 | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Mar. 31, 2018
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of Real Estate Ventures |  | $ (1,491) |  | $ (358) |  | $ (2,849) |  | $ (1,183) |  |
evo at Cira Centre South [Member] |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue | [1] | 0 |  | 0 |  | 0 |  | 995 |  |
Operating expenses | [1] | 0 |  | 0 |  | 0 |  | (250) |  |
Interest expense, net | [1] | 0 |  | 0 |  | 0 |  | (388) |  |
Depreciation and amortization | [1] | $ 0 |  | $ 0 |  | $ 0 |  | (376) |  |
Loss on early extinguishment of debt | [1] |  |  |  |  |  |  | (718) |  |
Net income (loss) | [1] |  |  |  |  |  |  | $ (737) |  |
Ownership interest % |  | 50.00% | [1] | 50.00% | [1] | 50.00% | [1] | 50.00% | [1] | 50.00%
Company's share of net income (loss) | [1] | $ 0 |  | $ 0 |  | $ 0 |  | $ (369) |  |
Basis adjustments and other | [1] | 0 |  | 0 |  | 0 |  | 11 |  |
Equity in income (loss) of Real Estate Ventures | [1] | 0 |  | 0 |  | 0 |  | (358) |  |
MAP Venture [Member] |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | 17,796 |  | 16,653 |  | 36,084 |  | 33,733 |  |
Operating expenses |  | (11,611) |  | (9,821) |  | (23,766) |  | (20,128) |  |
Interest expense, net |  | (2,532) |  | (3,741) |  | (5,068) |  | (7,532) |  |
Depreciation and amortization |  | (6,550) |  | (4,741) |  | (12,899) |  | (9,442) |  |
Net income (loss) |  | $ (2,897) |  | $ (1,650) |  | $ (5,649) |  | $ (3,369) |  |
Ownership interest % |  | 50.00% |  | 50.00% |  | 50.00% |  | 50.00% |  |
Company's share of net income (loss) |  | $ (1,449) |  | $ (825) |  | $ (2,825) |  | $ (1,685) |  |
Basis adjustments and other |  | 15 |  | (31) |  | (41) |  | (24) |  |
Equity in income (loss) of Real Estate Ventures |  | (1,434) |  | (856) |  | (2,866) |  | (1,709) |  |
Other [Member] |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | 15,567 |  | 24,448 |  | 32,338 |  | 49,194 |  |
Operating expenses |  | (5,757) |  | (10,268) |  | (12,320) |  | (20,479) |  |
Interest expense, net |  | (3,788) |  | (14,411) |  | (5,172) |  | (8,158) |  |
Depreciation and amortization |  | (6,922) |  | (9,051) |  | (14,285) |  | (18,358) |  |
Net income (loss) |  | (900) |  | (9,282) |  | 561 |  | 2,199 |  |
Company's share of net income (loss) |  | (59) |  | 348 |  | 5 |  | 871 |  |
Basis adjustments and other |  | 2 |  | 150 |  | 12 |  | 13 |  |
Equity in income (loss) of Real Estate Ventures |  | (57) |  | 498 |  | 17 |  | 884 |  |
Unconsolidated Real Estate Ventures [Member] |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | 33,363 |  | 41,101 |  | 68,422 |  | 83,922 |  |
Operating expenses |  | (17,368) |  | (20,089) |  | (36,086) |  | (40,857) |  |
Interest expense, net |  | (6,320) |  | (18,152) |  | (10,240) |  | (16,078) |  |
Depreciation and amortization |  | (13,472) |  | (13,792) |  | (27,184) |  | (28,176) |  |
Loss on early extinguishment of debt |  |  |  |  |  |  |  | (718) |  |
Net income (loss) |  | (3,797) |  | (10,932) |  | (5,088) |  | (1,907) |  |
Company's share of net income (loss) |  | (1,508) |  | (477) |  | (2,820) |  | (1,183) |  |
Basis adjustments and other |  | 17 |  | 119 |  | (29) |  | 0 |  |
Equity in income (loss) of Real Estate Ventures |  | $ (1,491) |  | $ (358) |  | $ (2,849) |  | $ (1,183) |  |
[1] | The Company sold its 50% ownership interest in evo at Cira Centre South Venture during the first quarter of 2018.

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