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Note 5 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Long-term debt, outstanding principal | $ 4,440,782 | $ 3,813,956
Long-term debt, unamortized discount | (608) | (671)
Long-term debt, unamortized original fees and costs | (45,077) | (47,354)
Long-term debt, net | 4,395,097 | 3,765,931
Long-term debt, outstanding principal, current | 27,000 | 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 | 27,000 | 26,994
Long-term debt, outstanding principal, noncurrent | 4,413,782 | 3,786,962
Long-term debt, unamortized discount, noncurrent | (608) | (671)
Long-term debt, unamortized original fees and costs, noncurrent | (45,077) | (47,354)
Long-term debt, net of current maturities and debt issuance costs | $ 4,368,097 | $ 3,738,937
Line of Credit [Member] | Bank Credit Facility [Member] |  |
Long-term debt, interest rate | 2.765% | 3.753%
Long-term debt, outstanding principal | $ 1,932,560 | $ 1,305,634
Long-term debt, unamortized discount | (608) | (671)
Long-term debt, unamortized original fees and costs | (13,145) | (14,255)
Long-term debt, net | $ 1,918,807 | $ 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 | (7,940) | (8,271)
Long-term debt, net | $ 742,060 | $ 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 | (8,895) | (9,244)
Long-term debt, net | $ 691,105 | $ 690,756
Senior Notes [Member] | The 4.750% Senior NotesDue December 2027 [Member] |  |
Long-term debt, interest rate | 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 | (15,097) | (15,584)
Long-term debt, net | $ 984,903 | $ 984,416
Other Long-Term Debt [Member] |  |
Long-term debt, interest rate | 11.148% | 11.138%
Long-term debt, outstanding principal | $ 58,222 | $ 58,322
Long-term debt, unamortized discount | 0 | 0
Long-term debt, unamortized original fees and costs | 0 | 0
Long-term debt, net | $ 58,222 | $ 58,322

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