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Note 5 - Goodwill - Goodwill Activity (Details) - USD ($) $ in Thousands	12 Months Ended			24 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Balance, goodwill	$ 1,083,287	$ 1,062,102	$ 888,224	$ 888,224
Additions, goodwill			173,878
Final purchase price adjustments, goodwill		21,185
Impairments, goodwill	(112,000)
Balance, goodwill	$ 971,287	$ 1,083,287	$ 1,062,102	$ 1,083,287

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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