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Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Long-term Debt | Long-term debt consists of the following at December 31:
(in thousands) |  | 2020 |  |  | 2019 |
Variable rate term loans1 |  | $ | 403,500 |  |  | $ | 397,500 |
Fixed rate term loans2 |  |  | 290,000 |  |  |  | 296,000 |
Revenue bonds3 |  |  | 65,735 |  |  |  | 65,735 |
Medium-term notes4 |  |  | 3,000 |  |  |  | 3,000 |
Long-term principal |  |  | 762,235 |  |  |  | 762,235 |
Debt issuance costs |  |  | (1,857 | ) |  |  | (2,086 | )
Unamortized discounts |  |  | (3,031 | ) |  |  | (3,680 | )
Total long-term debt |  |  | 757,347 |  |  |  | 756,469 |
Less: current portion of long-term debt |  |  | (39,981 | ) |  |  | (45,974 | )
Long-term debt |  | $ | 717,366 |  |  | $ | 710,495 |
1 | Variable rate term loans are at rates of one or three-month LIBOR plus a spread between 1.85% and 2.15% and mature between 2021 and 2030. At December 31, 2020, the one and three-month LIBOR rates were 0.16% and 0.23%, respectively. We have entered into interest rate swaps for these variable rate term loans to fix the interest rate. See Note 11: Derivative Instruments for additional information.
2 | Fixed rate term loans are at rates between 4.05% and 4.64% and mature between 2022 and 2025.
3 | Revenue bonds have a fixed rate of 2.75% and mature in 2024.
4 | Medium term notes have a fixed rate of 8.75% and mature in 2022.
Schedule of Maturities of Long-term Debt | Scheduled principal payments due on long-term debt at December 31, 2020 are as follows:
(in thousands) |  |  |  |
2021 |  | $ | 40,000 |
2022 |  |  | 43,000 |
2023 |  |  | 40,000 |
2024 |  |  | 175,735 |
2025 |  |  | 100,000 |
Thereafter |  |  | 363,500 |
Total |  | $ | 762,235 |

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