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Long-Term Obligations and Commitments, Maturity Schedules (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Annual Debt and Other Obligation Maturities [Abstract] |  |
Less: current portion | $ (13,749) | $ (1,621)
Total | 632,971 | $ 605,856
Long-Term Obligations, Excluding Financing Liability for Leased Facility [Member] |  |
Annual Debt and Other Obligation Maturities [Abstract] |  |
2019 | 22,067 |
2020 | 9,330 |
2021 | 694,774 |
2022 | 2,809 |
2023 | 3,494 |
Thereafter | 68,108 |
Subtotal | 800,582 |
Less: current portion | (12,890) |
Less: fixed and determinable interest | (41,837) |
Less: unamortized portion of debt discount | (111,426) |
Plus: Deferred rent | 4,960 |
Total | $ 639,389 |

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