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Note 15 - Selected Quarterly Financial Information (Unaudited) (Details Textual) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Asset Impairment Charges, Total				$ 174,700	$ 0	$ 993
Gain (Loss) on Disposition of Business, Including Nonrecurring Gain Related to Property Closures	$ 53,900
Gain (Loss) on Extinguishment of Debt, Total			$ (34,200)	$ (1,791)	$ (34,949)	$ (61)
COVID-19 Pandemic [Member]
Asset Impairment Charges, Total		$ 171,100

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- Definition

Amount of gain (loss) from sale and disposal of integrated set of activities and assets, including nonrecurring gain related to property closures.

+ References

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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