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Intangible Assets and Liabilities Estimated Future Annual Amortization Expense (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Intangible Assets [Abstract] |  |
2021 (amount remaining at September 30, 2021) | $ 9,450 |
2022 | 27,393 |
2023 | 19,811 |
2024 | 15,631 |
2025 | 14,655 |
Thereafter | 16,823 |
Total intangible assets subject to amortization (accretion) | 103,763 |
2021 (amount remaining at September 30, 2021) | (491) |
2022 | (459) |
2023 | 0 |
2024 | 0 |
2025 | 0 |
Thereafter | 0 |
Intangible liabilities, Net | (950) | $ (2,421)
2021 (amount remaining at September 30, 2021) | 8,959 |
2022 | 26,934 |
2023 | 19,811 |
2024 | 15,631 |
2025 | 14,655 |
Thereafter | 16,823 |
Total intangible assets (liabilities), net | $ 102,813 |

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