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Debt - Aggregate Required Principal Payments (Details) - Mortgages - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Amortization |  |
2019, amortization | $ 1,913 |
2020, amortization | 3,938 |
2021, amortization | 4,090 |
2022, amortization | 5,628 |
2023, amortization | 7,876 |
Thereafter, amortization | 33,868 |
Total amortization | 57,313 |
Maturities |  |
2019, maturities | 250,000 |
2020, maturities | 0 |
2021, maturities | 0 |
2022, maturities | 265,000 |
2023, maturities | 0 |
Thereafter, maturities | 1,355,422 |
Total maturities | 1,870,422 |
Total long term debt |  |
2019 | 251,913 |
2020 | 3,938 |
2021 | 4,090 |
2022 | 270,628 |
2023 | 7,876 |
Thereafter | 1,389,290 |
Total | $ 1,927,735 | $ 1,929,612

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