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Note H - Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 9,248	$ 3,446	$ 17,924	$ 7,338
Basic (in shares)	6,034	6,326	6,120	6,368
Dilutive effect of common stock equivalents (in shares)	54	47	83	45
Diluted weighted average common shares outstanding (in shares)	6,088	6,373	6,203	6,413
Basic (in dollars per share)	$ 1.53	$ 0.54	$ 2.93	$ 1.15
Diluted (in dollars per share)	$ 1.52	$ 0.54	$ 2.89	$ 1.14

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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