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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Significant Accounting Policies |
Schedule of estimated useful lives of real estate assets | ​
​ | ​ | ​ | ​ | ​ | ​
Category |  | Years |
Commercial buildings |  | ​ | 39 | ​ | ​
Building improvements |  | 15 | - | 39 | ​
Fixtures and equipment |  | 3 | - | 7 | ​
Schedule of estimated annual amortization expense for succeeding five years for acquired in-place lease and above-market leases | ​
​ | ​ | ​ | ​ | ​
(in thousands) |  | December 31, |
2020 | ​ | $ | 12,494 | ​
2021 | ​ |  | 9,000 | ​
2022 | ​ |  | 5,420 | ​
2023 | ​ |  | 4,288 | ​
2024 | ​ |  | 3,539 | ​
2025 and thereafter | ​ |  | 5,963 | ​
Schedule of estimated annual amortization for unfavorable leases | ​
​ | ​ | ​ | ​ | ​
(in thousands) |  | December 31, |
2020 | ​ | $ | 920 | ​
2021 | ​ |  | 597 | ​
2022 | ​ |  | 323 | ​
2023 | ​ |  | 218 | ​
2024 | ​ |  | 144 | ​
2025 and thereafter | ​ |  | 310 | ​
Schedule of Cash and cash equivalents | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
(in thousands) | ​ | 2019 | ​ | 2018
Cash and cash equivalents | ​ | $ | 9,790 | ​ | $ | 11,177
Restricted cash | ​ |  | — | ​ |  | —
Total cash, cash equivalents and restricted cash | ​ | $ | 9,790 | ​ | $ | 11,177
Schedule of estimated annual amortization for deferred leasing commissions | ​
​ | ​ | ​ | ​ | ​
(in thousands) |  | December 31, |
2020 |  | $ | 9,082 | ​
2021 |  |  | 8,584 | ​
2022 |  |  | 7,372 | ​
2023 |  |  | 6,467 | ​
2024 |  |  | 5,402 | ​
2025 and thereafter |  |  | 15,860 | ​
Summary of rental revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ | ​ | December 31, |
(in thousands) |  | 2019 |  | 2018 |  | 2017 |
Income from leases | ​ | $ | 191,828 | ​ | $ | 202,127 | ​ | $ | 205,690 | ​
Reimbursable expenses | ​ |  | 64,421 | ​ |  | 61,475 | ​ |  | 58,777 | ​
Straight-line rent adjustment | ​ |  | 8,876 | ​ |  | (381) | ​ |  | 1,767 | ​
Amortization of favorable and unfavorable leases | ​ |  | 402 | ​ |  | 556 | ​ |  | 1,031 | ​
​ | ​ | $ | 265,527 | ​ | $ | 263,777 | ​ | $ | 267,265 | ​

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