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Note 8 - Fair Value Measurements - Long-term Debt (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Long-term debt	$ 3,080,550	$ 3,069,393
Reported Value Measurement [Member]
Long-term debt	3,034,177	3,031,594
Estimate of Fair Value Measurement [Member]
Long-term debt	3,045,225	3,128,058
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member]
Long-term debt	880,000	867,897
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Reported Value Measurement [Member]
Long-term debt	861,527	859,106
Fair Value, Inputs, Level 2 [Member] | Bank Credit Facility [Member] | Line of Credit [Member] | Estimate of Fair Value Measurement [Member]
Long-term debt	877,800	866,812
Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior NotesDue December 2027 [Member] | Senior Notes [Member]
Long-term debt	1,000,000	900,000
Fair Value, Inputs, Level 1 [Member] | The 4.750% Senior NotesDue December 2027 [Member] | Senior Notes [Member] | Reported Value Measurement [Member]
Long-term debt	988,798	886,746
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	987,500	915,750
Fair Value, Inputs, Level 1 [Member] | Senior Note 6.375% Due 2026 [Member] | Senior Notes [Member]
Long-term debt		1,000,000
Fair Value, Inputs, Level 1 [Member] | Senior Note 6.375% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member]
Long-term debt		988,312
Fair Value, Inputs, Level 1 [Member] | Senior Note 6.375% Due 2026 [Member] | Senior Notes [Member] | Estimate of Fair Value Measurement [Member]
Long-term debt		1,023,750
Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member]
Long-term debt	300,000
Fair Value, Inputs, Level 1 [Member] | Senior Note 8.625% Due 2025 [Member] | Senior Notes [Member] | Reported Value Measurement [Member]
Long-term debt	296,231
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	315,375
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member]
Long-term debt		300,000
Fair Value, Inputs, Level 1 [Member] | Senior Notes 6.000% Due 2026 [Member] | Senior Notes [Member] | Reported Value Measurement [Member]
Long-term debt		295,934
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		320,250
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, Inputs, Level 1 [Member] | The 4.750% Senior Notes Due June 2031 [Member] | Senior Notes [Member] | Reported Value Measurement [Member]
Long-term debt	887,071
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	864,000
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member]
Long-term debt	550	1,496
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Reported Value Measurement [Member]
Long-term debt	550	1,496
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Debt [Member] | Estimate of Fair Value Measurement [Member]
Long-term debt	$ 550	$ 1,496

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+ References

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-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

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