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Significant Accounting Policies - Narrative (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) segment | Jun. 30, 2018 USD ($) | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
Significant Accounting Policies Statement [Line Items] |  |  |  |  |  |
Property impairment charges | $ 0 | $ 0 | $ 0 | $ 0 |  |
Amortization of above and below-market leases | 1,000,000.0 | 900,000 | $ 1,900,000 | 1,800,000 |  |
Remaining weighted average lease term related to these intangible assets and liabilities |  |  | 8 years 4 months 24 days |  |  |
Straight-line rent and accounts receivables, net of allowances | 25,800,000 |  | $ 25,800,000 |  |  | $ 25,700,000
Straight-line rent and accounts receivable, allowances | 300,000 |  | 300,000 |  |  | 200,000
Deferred financing cost accumulated amortization | 7,500,000 |  | $ 7,500,000 |  |  | $ 6,900,000
Performance measurement period |  |  | 3 years |  |  |
Lease liability | 800,000 |  | $ 800,000 |  | $ 900,000 |
Right-of-use asset | 700,000 |  | $ 700,000 |  | $ 800,000 |
Weighted average remaining lease term |  |  |  |  | 3 years 6 months |
Incremental borrowing rate |  |  |  |  | 2.70% |
Real estate investment |  |  |  |  |  |
Significant Accounting Policies Statement [Line Items] |  |  |  |  |  |
Number of reportable segments | segment |  |  | 1 |  |  |
Senior Secured Loan Receivable |  |  |  |  |  |
Significant Accounting Policies Statement [Line Items] |  |  |  |  |  |
Impairment charges | $ 0 | $ 0 | $ 0 | $ 0 |  |

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