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Leases - Future Base Rental Revenue for Topic 840 (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Leases [Abstract] |
2019 | $ 138,784
2020 | 131,647
2021 | 120,450
2022 | 111,532
2023 | 111,962
Thereafter | $ 671,111

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