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Note 5 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | May 21, 2020 | Dec. 31, 2019 | Dec. 03, 2019
--- | --- | --- | --- | ---
Long-term debt, outstanding principal | $ 4,043,458 |  | $ 3,813,956 |
Long-term debt, unamortized discount | (517) |  | (671) |
Long-term debt, unamortized original fees and costs | (55,409) |  | (47,354) |
Long-term debt, net | 3,987,532 |  | 3,765,931 |
Long-term debt, outstanding principal, current | 29,165 |  | 26,994 |
Long-term debt, unamortized discount, current | 0 |  | 0 |
Long-term debt, unamortized original fees and costs, current | 0 |  | 0 |
Current maturities of long-term debt | 29,165 |  | 26,994 |
Long-term debt, outstanding principal, noncurrent | 4,014,293 |  | 3,786,962 |
Long-term debt, unamortized discount, noncurrent | (517) |  | (671) |
Long-term debt, unamortized original fees and costs, noncurrent | (55,409) |  | (47,354) |
Long-term debt, net of current maturities and debt issuance costs | $ 3,958,367 |  | $ 3,738,937 |
Line of Credit [Member] | Bank Credit Facility [Member] |  |  |  |
Long-term debt, interest rate | 2.558% |  | 3.753% |
Long-term debt, outstanding principal | $ 989,313 |  | $ 1,305,634 |
Long-term debt, unamortized discount | (517) |  | (671) |
Long-term debt, unamortized original fees and costs | (14,703) |  | (14,255) |
Long-term debt, net | $ 974,093 |  | $ 1,290,708 |
Senior Notes [Member] | Senior Notes 6.375% Due 2026 [Member] |  |  |  |
Long-term debt, interest rate | 6.375% |  | 6.375% |
Long-term debt, outstanding principal | $ 750,000 |  | $ 750,000 |
Long-term debt, unamortized discount | 0 |  | 0 |
Long-term debt, unamortized original fees and costs | (7,278) |  | (8,271) |
Long-term debt, net | $ 742,722 |  | $ 741,729 |
Senior Notes [Member] | Senior Notes 6.000% Due 2026 [Member] |  |  |  |
Long-term debt, interest rate | 6.00% |  | 6.00% |
Long-term debt, outstanding principal | $ 700,000 |  | $ 700,000 |
Long-term debt, unamortized discount | 0 |  | 0 |
Long-term debt, unamortized original fees and costs | (8,197) |  | (9,244) |
Long-term debt, net | $ 691,803 |  | $ 690,756 |
Senior Notes [Member] | The 4.750% Senior NotesDue December 2027 [Member] |  |  |  |
Long-term debt, interest rate | 4.75% |  | 4.75% | 4.75%
Long-term debt, outstanding principal | $ 1,000,000 |  | $ 1,000,000 |
Long-term debt, unamortized discount | 0 |  | 0 |
Long-term debt, unamortized original fees and costs | (14,123) |  | (15,584) |
Long-term debt, net | $ 985,877 |  | $ 984,416 |
Senior Notes [Member] | Senior Note 8.625% Due 2025 [Member] |  |  |  |
Long-term debt, interest rate | 8.625% | 8.625% |  |
Long-term debt, outstanding principal | $ 600,000 |  |  |
Long-term debt, unamortized discount | 0 |  |  |
Long-term debt, unamortized original fees and costs | (11,108) |  |  |
Long-term debt, net | $ 588,892 |  |  |
Other Long-Term Debt [Member] |  |  |  |
Long-term debt, interest rate | 6.124% |  | 11.138% |
Long-term debt, outstanding principal | $ 4,145 |  | $ 58,322 |
Long-term debt, unamortized discount | 0 |  | 0 |
Long-term debt, unamortized original fees and costs | 0 |  | 0 |
Long-term debt, net | $ 4,145 |  | $ 58,322 |

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