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Note 10 - Fair Value Measurements - Long-Term Debt (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Long-term debt | $ 3,954,787 | $ 4,030,035
Reported Value Measurement [Member] |  |
Long-term debt | 3,909,206 | 3,979,300
Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 4,047,589 | 3,918,672
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] |  |
Long-term debt | 1,696,282 | 1,771,330
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 1,676,398 | 1,748,529
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 1,685,646 | 1,720,654
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.875% Due 2023 [Member] | Senior Notes [Member] |  |
Long-term debt | 750,000 | 750,000
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.875% Due 2023 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 743,177 | 742,299
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.875% Due 2023 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | 776,250 | 757,500
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.375% Due 2026 [Member] | Senior Notes [Member] |  |
Long-term debt | 750,000 | 750,000
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.375% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 741,068 | 740,406
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 | 792,188 | 724,688
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] |  |
Long-term debt | 700,000 | 700,000
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 690,058 | 689,361
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 | 735,000 | 657,125
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] |  |
Long-term debt | 58,505 | 58,705
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Reported Value Measurement [Member] |  |
Long-term debt | 58,505 | 58,705
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Estimate of Fair Value Measurement [Member] |  |
Long-term debt | $ 58,505 | $ 58,705

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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