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Debt and Letters of Credit - Schedule of Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Current: |  |
Other borrowings | $ 911 | $ 4,890
Long-term: |  |
Borrowings under credit facility | 0 | 0
Long-term debt | 1,167,366 | 1,701,098
Total long-term | 1,167,366 | 1,701,098
2023 Notes |  |
Long-term: |  |
Long-term debt | 193,012 | 611,250
Unamortized discount | (49) | (283)
Unamortized deferred financing costs | (211) | (1,203)
2024 Notes |  |
Long-term: |  |
Long-term debt | 381,014 | 500,000
Unamortized discount | (1,214) | (2,130)
Unamortized deferred financing costs | (951) | (1,670)
2028 Notes |  |
Long-term: |  |
Long-term debt | 600,000 | 600,000
Unamortized discount | (854) | (981)
Unamortized deferred financing costs | $ (3,381) | $ (3,885)

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