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Summary of Significant Accounting Policies - Other Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018
Accounting Policies [Abstract] |  |  |
Financing cash flows for finance leases | $ 3,924 | $ (4,706) | $ 0
Operating cash flows for finance leases | 1,305 | 3,820 |
Operating cash flows for operating leases | 17,527 | 54,311 |
Right-of-use assets obtained in exchange for new lease liabilities: Finance leases | 822 | 10,843 |
Right-of-use assets obtained in exchange for new lease liabilities: Operating leases | $ (7,053) | $ (1,885) |
Weighted-average remaining lease term (in years): Finance leases | 12 years | 12 years |
Weighted-average remaining lease term (in years): Operating leases | 9 years 7 months 6 days | 9 years 7 months 6 days |
Weighted-average discount rate: Finance leases | 18.76% | 18.76% |
Weighted-average discount rate: Operating leases | 6.84% | 6.84% |

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