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Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
2021 (nine months remaining) | $ 11,931 |
2022 | 10,050 |
2023 | 7,440 |
2024 | 5,215 |
2025 | 4,027 |
Thereafter | 5,220 |
Intangible assets, net | 43,883 | $ 48,570
Liabilities |  |
2021 (nine months remaining) | 3,576 |
2022 | 2,682 |
2023 | 1,642 |
2024 | 1,425 |
2025 | 1,148 |
Thereafter | 6,600 |
Intangible liabilities, net | $ 17,073 | $ 18,448

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