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Note J - Stock-Based Compensation (Detail) - Stock-Based Compensation (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Allocated share based compensation	$ 329	$ 210
Tax benefit of stock-based compensation expense	(120)	(72)
After-tax effect of stock-based compensation	209	138
Stock Options and Restricted Stock Units [Member]
Allocated share based compensation	329	193
Deferred Directors Fees [Member]
Allocated share based compensation		$ 17

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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