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Intangible Assets
 12 Months Ended
Dec. 31, 2019
Business Combinations [Abstract]  
Intangible Assets Intangible Assets

Intangible assets consist of a lease intangible for leases acquired with lease rates that were above market at the time of acquisition. The following table summarizes the amortization of intangible assets as of December 31, 2019 (in thousands):
Years ending December 31,
Total intangible assets
2020
$
22,491

2021
16,549

2022
10,497

2023
4,657

2024
1,962

2025 and thereafter
—

Total
$
56,156



Amortization expense related to intangible assets was $37.5 million, $62.9 million, and $90.0 million for the twelve months ended December 31, 2019, 2018, and 2017, respectively.