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Note H - Earnings Per Share (Details) - Computations of Basic and Diluted Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Computations of Basic and Diluted Earnings Per Share [Abstract]
Net income (in Dollars)	$ 5,369us-gaap_ProfitLoss	$ 1,357us-gaap_ProfitLoss
Basic weighted average common shares outstanding	7,425us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	7,985us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of common stock equivalents	42us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment	48us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Diluted weighted average common shares outstanding	7,467us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	8,033us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic earnings per share (in Dollars per share)	$ 0.72us-gaap_EarningsPerShareBasic	$ 0.17us-gaap_EarningsPerShareBasic
Diluted earnings per share (in Dollars per share)	$ 0.72us-gaap_EarningsPerShareDiluted	$ 0.17us-gaap_EarningsPerShareDiluted

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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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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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