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ACQUISITIONS AND DISPOSITIONS - Carrying Value of Assets and Liabilities at Time of Sale and Held for Sale (Details) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 14, 2019 USD ($) | Mar. 01, 2019 USD ($) | Jul. 31, 2019 USD ($) | Mar. 31, 2019 | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) property | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | May 16, 2019 USD ($) | Dec. 31, 2018 USD ($)
Disposal Group |  |  |  |  |  |  |  |  |  |  |
Ownership sold, percentage |  |  |  |  |  |  |  | 100.00% |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |
Total assets, net |  |  |  |  | $ 178,927,000 |  |  | $ 178,927,000 |  |  | $ 22,175,000
Liabilities |  |  |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  | 3,245,000 |  |  | 3,245,000 |  |  | 28,766,000
Deferred loan costs |  |  |  |  | 1,704,000 |  |  | 1,704,000 |  |  |
Debt, accumulated amortization |  |  |  |  | 576,000 |  |  | 576,000 |  |  |
Payment of mortgages payable |  |  |  |  |  |  |  | 46,000,000 | $ 0 |  |
Impairment of real estate |  |  |  |  | 2,800,000 | $ 66,200,000 | $ 0 | 69,000,000 | $ 0 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |
Investments in real estate, net |  |  |  |  | 318,918,000 |  |  | 318,918,000 |  |  |
Deferred rent receivable and charges, net |  |  |  |  | 41,280,000 |  |  | 41,280,000 |  |  |
Other intangible assets, net |  |  |  |  | 316,000 |  |  | 316,000 |  |  |
Total assets, net |  |  |  |  | 360,514,000 |  |  | 360,514,000 |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Debt, net |  |  |  |  | 318,072,000 |  |  | 318,072,000 |  |  |
Total liabilities |  |  |  |  | 318,072,000 |  |  | 318,072,000 |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |
Investments in real estate, net |  |  |  |  | 157,608,000 |  |  | 157,608,000 |  |  | 17,123,000
Cash and cash equivalents |  |  |  |  | 2,050,000 |  |  | 2,050,000 |  |  | 755,000
Accounts receivable, net |  |  |  |  | 1,075,000 |  |  | 1,075,000 |  |  | 41,000
Deferred rent receivable and charges, net |  |  |  |  | 13,992,000 |  |  | 13,992,000 |  |  | 4,009,000
Other intangible assets, net |  |  |  |  | 0 |  |  | 0 |  |  | 220,000
Other assets |  |  |  |  | 4,202,000 |  |  | 4,202,000 |  |  | 27,000
Total assets, net |  |  |  |  | 178,927,000 |  |  | 178,927,000 |  |  | 22,175,000
Liabilities |  |  |  |  |  |  |  |  |  |  |
Debt, net |  |  |  |  | 0 |  |  | 0 |  |  | 28,018,000
Accounts payable and accrued expenses |  |  |  |  | 2,160,000 |  |  | 2,160,000 |  |  | 370,000
Due to related parties |  |  |  |  | 518,000 |  |  | 518,000 |  |  | 81,000
Other liabilities |  |  |  |  | 567,000 |  |  | 567,000 |  |  | 297,000
Total liabilities |  |  |  |  | 3,245,000 |  |  | 3,245,000 |  |  | 28,766,000
Deferred loan costs |  |  |  |  |  |  |  |  |  |  | 243,000
Debt, accumulated amortization |  |  |  |  |  |  |  |  |  |  | 61,000
Investments in real estate |  |  |  |  | 230,523,000 |  |  | 230,523,000 |  |  | 24,832,000
Investments in real estate, accumulated depreciation |  |  |  |  | 72,915,000 |  |  | 72,915,000 |  |  | 7,709,000
Deferred rent receivable |  |  |  |  | 9,640,000 |  |  | 9,640,000 |  |  | 2,909,000
Deferred leasing costs |  |  |  |  | 11,165,000 |  |  | 11,165,000 |  |  | 1,669,000
Deferred leasing costs, accumulated amortization |  |  |  |  | 6,813,000 |  |  | 6,813,000 |  |  | 569,000
Lease inducements |  |  |  |  | 8,966,000 |  |  | 8,966,000 |  |  |
Lease inducements, accumulated amortization |  |  |  |  | $ 4,870,000 |  |  | $ 4,870,000 |  |  |
Debt, gross |  |  |  |  |  |  |  |  |  |  | 28,200,000
Acquired In-Place Leases | Disposal Group, Held-for-sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |
Other intangible assets, net |  |  |  |  |  |  |  |  |  |  | 1,778,000
Liabilities |  |  |  |  |  |  |  |  |  |  |
Other intangible assets, accumulated amortization |  |  |  |  |  |  |  |  |  |  | $ 1,558,000
Office Property, San Fransisco California | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Outstanding amount | $ 28,200,000 |  |  |  |  |  |  |  |  |  |
Office Property, Washington, D.C. | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Payment of mortgages payable |  | $ 46,000,000 |  |  |  |  |  |  |  |  |
260 Townsend Street, San Francisco, CA |  |  |  |  |  |  |  |  |  |  |
Disposal Group |  |  |  |  |  |  |  |  |  |  |
Ownership sold, percentage |  |  |  | 100.00% |  |  |  |  |  |  |
Mortgage loan with a fixed interest of 4.14% per annum, due on July 1, 2026 | Properties Used As Collateral For Loans | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Defeased amount |  | $ 205,500,000 |  |  |  |  |  |  |  |  |
Mortgage loan with a fixed interest of 4.14% per annum, due on July 1, 2026 | 1333 Broadway, Oakland, CA | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Defeased amount |  |  |  |  |  |  |  |  |  | $ 39,500,000 |
Land and Building |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Ownership percentage to be sold in potential sale |  |  |  |  |  | 100.00% |  |  |  |  |
Building |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Number of real estate investment property sold in potential sale | property |  |  |  |  |  | 2 |  |  |  |  |
Land |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Number of real estate investment property sold in potential sale | property |  |  |  |  |  | 1 |  |  |  |  |
Forecast | Subsequent Event | Two Office Properties And One Developmental Site, Washington, D.C. | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale |  |  | $ 200,000 |  |  |  |  |  |  |  |

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