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Intangible Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | The following table summarizes the Company’s identified intangible assets and intangible liabilities as of December 31, 2017 and 2016.
| As of December 31,
| 2017 |  | 2016
Intangible assets: |  |  |
Acquired in-place leases | $ | 226,515 |  |  | $ | 181,145 |
Acquired above market leases | 29,670 |  |  | 27,072 |
Intangible assets | 256,185 |  |  | 208,217 |
Accumulated amortization: |  |  |
Accumulated amortization, acquired in-place leases | (123,043 | ) |  | (118,526 | )
Accumulated amortization, above market leases | (17,731 | ) |  | (17,433 | )
Accumulated amortization | (140,774 | ) |  | (135,959 | )
Intangible assets, net | 115,411 |  |  | 72,258 |
Deferred leasing costs: |  |  |
Leasing costs | 17,355 |  |  | 16,325 |
Accumulated amortization, leasing costs | (8,642 | ) |  | (8,120 | )
Deferred leasing costs, net | 8,713 |  |  | 8,205 |
Deferred leasing costs and other related intangibles, net | $ | 124,124 |  |  | $ | 80,463 |
Intangible liabilities: |  |  |
Acquired below market leases | $ | 80,862 |  |  | $ | 65,740 |
Accumulated amortization, acquired below market leases | (27,330 | ) |  | (21,801 | )
Intangible liabilities, net | $ | 53,532 |  |  | $ | 43,939 |
Schedule of Identified Intangible Assets and Liabilities | The following table provides a summary of the amortization related to acquired in-place lease intangibles and acquired above and below market lease costs for the years ended December 31, 2017, 2016 and 2015.
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Amortization of: |  |  |  |  |
In-place lease intangibles | $ | 22,580 |  |  | $ | 18,298 |  |  | $ | 16,546 |
Above market lease costs (a) | 3,053 |  |  | 2,581 |  |  | 2,779 |
Amortization of intangible assets | 25,633 |  |  | 20,879 |  |  | 19,325 |
Deferred leasing costs | 1,806 |  |  | 1,703 |  |  | 1,789 |
Amortization of deferred leasing costs and intangible assets | $ | 27,439 |  |  | $ | 22,582 |  |  | $ | 21,114 |
Below market lease costs (b) | $ | 8,563 |  |  | $ | 6,676 |  |  | $ | 4,185 |
Amortization of intangible liabilities | $ | 8,563 |  |  | $ | 6,676 |  |  | $ | 4,185 |
(a) | Amounts are recorded as a reduction to rental income.
(b) | Amounts are recorded as an increase to rental income.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The following table provides a summary of the amortization during the next five years and thereafter related to deferred costs and intangible assets and liabilities as of December 31, 2017.
Year ended December 31, |  | In-place lease intangible assets |  | Above market lease intangible assets |  | Deferred leasing cost assets |  | Below market lease intangible liabilities
2018 |  | $ | 20,419 |  |  | $ | 2,822 |  |  | $ | 2,266 |  |  | $ | 7,956 |
2019 |  | 17,496 |  |  | 2,077 |  |  | 1,504 |  |  | 7,193 |
2020 |  | 14,244 |  |  | 1,683 |  |  | 1,327 |  |  | 6,328 |
2021 |  | 11,032 |  |  | 1,263 |  |  | 1,090 |  |  | 5,359 |
2022 |  | 8,294 |  |  | 833 |  |  | 797 |  |  | 5,666 |
Thereafter |  | 31,987 |  |  | 3,261 |  |  | 1,729 |  |  | 21,030 |
Total |  | $ | 103,472 |  |  | $ | 11,939 |  |  | $ | 8,713 |  |  | $ | 53,532 |

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