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Note 7 - Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)
Balance	$ 249.5
Balance, accumulated impairment losses	(41.7)
Balance, net	207.8
Divestiture	(1.7)
Foreign currency fluctuations	(3.9)
Foreign currency fluctuations	(0.2)
Foreign currency fluctuations	(4.1)
Balance as of June 30, 2021	243.9
Balance as of June 30, 2021	(41.9)
Balance as of June 30, 2021	$ 202.0

X

- Definition

The change to the recorded value of accumulated impairment losses for foreign currency translation adjustments.

+ References

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The change to the recorded net goodwill for foreign currency translation adjustments.

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- 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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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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