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Note H - Stock-Based Compensation (Detail) - Stock-Based Compensation (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Allocated share based compensation	$ 472,000	$ 505,000	$ 844,000	$ 2,197,000
Tax benefit of stock-based compensation expense	(173,000)	(168,000)	(302,000)	(733,000)
After-tax effect of stock-based compensation	299,000	337,000	542,000	1,464,000
Stock Options and Restricted Stock Units [Member]
Allocated share based compensation	460,000	493,000	800,000	2,148,000
Deferred Directors Fees [Member]
Allocated share based compensation	$ 12,000	$ 12,000	$ 44,000	$ 49,000

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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