DEBT (Tables)
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12 Months Ended |
Dec. 31, 2020 |
| Debt Disclosure [Abstract] |
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| Schedule of Short-term Debt [Table Text Block] |
Short-term debt consisted of the following: | | | | | | | | | | | | | | | | | | December 31, | | | 2020 | | 2019 | | | | (Thousands of Dollars) | | Short-term line of credit | | $ | — | | | $ | 5,500 | | Current portion of finance leases (refer to Note 16) | | $ | 3,839 | | | $ | 4,546 | |
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| Schedule of Long-term Debt Instruments [Table Text Block] |
Long-term debt consisted of the following: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, | | | Maturity | | 2020 | | 2019 | | | | | | | (Thousands of Dollars) | | Revolving Credit Agreement | | 2023 | | | $ | — | | | $ | 475,000 | | | 4.80% senior notes | | 2020 | | | — | | | 450,000 | | | 6.75% senior notes | | 2021 | | | 300,000 | | | 300,000 | | | 4.75% senior notes | | 2022 | | | 250,000 | | | 250,000 | | | 5.75% senior notes | | 2025 | | | 600,000 | | | — | | | 6.00% senior notes | | 2026 | | | 500,000 | | | 500,000 | | | 5.625% senior notes | | 2027 | | | 550,000 | | | 550,000 | | | 6.375% senior notes | | 2030 | | | 600,000 | | | — | | | Subordinated Notes | | 2043 | | | 402,500 | | | 402,500 | | | GoZone Bonds | 2038 | thru | 2041 | | 322,140 | | | 365,440 | | | Receivables Financing Agreement | | 2023 | | | 57,000 | | | 62,200 | | Net fair value adjustments, unamortized discounts and unamortized debt issuance costs | | N/A | | | (42,382) | | | (23,301) | | | Total long-term debt (excluding finance leases) | | | | | 3,539,258 | | | 3,331,839 | | Finance leases (refer to Note 16) | | | | | 54,238 | | | 55,446 | | | Less current portion | | | | | — | | | 452,367 | | | Long-term debt, less current portion | | | | | $ | 3,593,496 | | | $ | 2,934,918 | |
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| Schedule of Maturities of Long-term Debt [Table Text Block] |
The long-term debt repayments (excluding finance leases) are due as follows (in thousands of dollars): | | | | | | | 2021 | $ | 300,000 | | | 2022 | 250,000 | | | 2023 | 57,000 | | | 2024 | — | | | 2025 | 600,000 | | | Thereafter | 2,374,640 | | | Total repayments | 3,581,640 | | | Net fair value adjustments, unamortized discounts and unamortized debt issuance costs | (42,382) | | | Total long-term debt (excluding finance leases) | $ | 3,539,258 | |
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| Schedule of GoZone Bonds [Table Text Block] |
The following table summarizes the GoZone Bonds outstanding as of December 31, 2020: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Series | | Date Issued | | Amount Outstanding | | | | | | | | Interest Rate | | Mandatory Purchase Date | | Maturity Date | | | | | (Thousands of Dollars) | | | | | | | | Series 2008 | | June 26, 2008 | | $ | 55,440 | | | | | | | | | 6.10 | % | | June 1, 2030 | | June 1, 2038 | | Series 2010 | | July 15, 2010 | | 100,000 | | | | | | | | | 6.35 | % | | n/a | | July 1, 2040 | | Series 2010A | | October 7, 2010 | | 43,300 | | | | | | | | | 6.35 | % | | n/a | | October 1, 2040 | | Series 2010B | | December 29, 2010 | | 48,400 | | | | | | | | | 6.10 | % | | June 1, 2030 | | December 1, 2040 | | Series 2011 | | August 9, 2011 | | 75,000 | | | | | | | | | 5.85 | % | | June 1, 2025 | | August 1, 2041 | | | Total | | $ | 322,140 | | | | | | | | | | | | | |
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