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Note 2 - Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	2. Earnings Per Share We compute basic earnings per share by dividing net earnings available to common stockholders by the actual weighted average number of common shares outstanding for the reporting period. Diluted earnings per share reflects the potential dilution that could occur if holders of unvested restricted and performance share units converted their holdings into common stock. The dilutive effect of restricted and performance share units was 1.0 million shares during both the third quarter 2019 and 2018. During the nine months ended September 30, 2019 and 2018, the dilutive effect of restricted and performance share units was 1.0 million shares and 1.1 million shares, respectively.

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- Definition

The entire disclosure for earnings per share.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-URI http://asc.fasb.org/topic&trid=2144383

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