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Note 8 - Fair Value Measurements - Long-term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] |  |
Long-term debt |  | $ 600,000
Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt |  | 589,488
Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt |  | 667,500
Fair Value, Nonrecurring [Member] |  |
Long-term debt | $ 3,386,943 | 3,949,823
Fair Value, Nonrecurring [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 3,339,550 | 3,897,483
Fair Value, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 3,511,731 | 4,104,524
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] |  |
Long-term debt | 884,648 | 896,185
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 873,679 | 882,789
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 882,436 | 888,511
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior NotesDue December 2027 [Member] | Senior Notes [Member] |  |
Long-term debt | 1,000,000 | 1,000,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior NotesDue December 2027 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 987,338 | 986,364
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior NotesDue December 2027 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 1,032,500 | 1,038,750
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.375% Due 2026 [Member] | Senior Notes [Member] |  |
Long-term debt |  | 750,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.375% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt |  | 743,053
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.375% Due 2026 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt |  | 778,125
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] |  |
Long-term debt | 600,000 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 590,678 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 660,750 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] |  |
Long-term debt |  | 700,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt |  | 692,151
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt |  | 728,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior Notes Due June 2031 [Member] | Senior Notes [Member] |  |
Long-term debt | 900,000 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior Notes Due June 2031 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 885,560 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior Notes Due June 2031 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 933,750 |
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] |  |
Long-term debt | 2,295 | 3,638
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 2,295 | 3,638
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | $ 2,295 | $ 3,638

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