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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of interest capitalized during the period.

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Note 4 - Long-term Debt (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Oct. 19, 2020	Dec. 31, 2019
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 127,000	$ 134,000
Interest Costs Capitalized	$ 0	$ 0
2024 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.125%			5.125%
2026 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.875%			5.875%
2027 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	7.00%			7.00%
The 2019 Senior Credit Facility [Member] \| The 2019 Term Loan [Member]
Debt Instrument, Interest Rate, Effective Percentage	2.70%
The 2017 Senior Credit Facility [Member] \| The 2017 Term Loan [Member]
Debt Instrument, Interest Rate, Effective Percentage	2.40%
The 2030 Notes [Member] \| Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage			4.75%
Debt Instrument, Face Amount			$ 800,000