| Schedule of Acquired Intangible Assets, Net |
Acquired intangible assets, net, consisted of the following as of March 31, 2019 and December 31, 2018 (amounts in thousands, except weighted average life amounts): | | | | | | | | | | March 31, 2019 | | December 31, 2018 | In-place leases, net of accumulated amortization of $45,523 and $41,143, respectively (with a weighted average remaining life of 9.8 years and 10.1 years, respectively) | $ | 143,496 |
| | $ | 151,135 |
| Above-market leases, net of accumulated amortization of $1,055 and $899, respectively (with a weighted average remaining life of 4.8 years and 5.1 years, respectively) | 1,554 |
| | 1,710 |
| Ground lease assets, net of accumulated amortization of $0 and $39, respectively (with a weighted average remaining life of 0.0 years and 83.5 years, respectively) | — |
| (1) | 1,359 |
| | $ | 145,050 |
| | $ | 154,204 |
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| | (1) | On January 1, 2019, as part of the adoption of ASC 842, as discussed in Note 2—"Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements", the Company reclassified the ground lease assets balance from acquired intangible assets, net, to right-of-use assets - operating leases within the condensed consolidated balance sheet. |
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Acquired intangible assets, net, consisted of the following as of December 31, 2018 and 2017 (amounts in thousands, except weighted average life amounts): | | | | | | | | | | December 31, 2018 | | December 31, 2017 | In-place leases, net of accumulated amortization of $41,143 and $21,776, respectively (with a weighted average remaining life of 10.1 years and 11.0 years, respectively) | $ | 151,135 |
| | $ | 148,594 |
| Above-market leases, net of accumulated amortization of $899 and $358, respectively (with a weighted average remaining life of 5.1 years and 2.8 years, respectively) | 1,710 |
| | 1,344 |
| Ground lease assets, net of accumulated amortization of $39 and $28, respectively (with a weighted average remaining life of 83.5 years and 65.8 years, respectively) | 1,359 |
| | 616 |
| | $ | 154,204 |
| | $ | 150,554 |
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| Schedule of Estimated Future Amortization Expense of Acquired Intangible Assets |
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Estimated amortization expense on the acquired intangible assets as of December 31, 2018, and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): | | | | | | Year | | Amount | 2019 | | $ | 20,472 |
| 2020 | | 18,267 |
| 2021 | | 17,470 |
| 2022 | | 15,064 |
| 2023 | | 13,669 |
| Thereafter | | 69,262 |
| | | $ | 154,204 |
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