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Note I - Stock-Based Compensation (Detail) - (Table 4) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Number Of Shares [Member]	Dec. 31, 2010 Number Of Shares [Member]	Dec. 31, 2009 Number Of Shares [Member]	Dec. 31, 2011 Weighted Average Exercise Price [Member]	Dec. 31, 2010 Weighted Average Exercise Price [Member]	Dec. 31, 2009 Weighted Average Exercise Price [Member]	Dec. 31, 2008 Weighted Average Exercise Price [Member]	Dec. 31, 2011 Aggregate Instrinsic Value [Member]
Outstanding at January 1, 2009 (in Shares)	2,703,000	2,423,000	1,737,000
Outstanding at January 1, 2009				$ 17.79	$ 14.08	$ 9.12	$ 7.19
Number of Shares Granted (in Shares)	618,000	971,000	1,320,000
Weighted Average Exercise Price Granted				$ 29.93	$ 22.49	$ 10.42
Number of Shares Exercised (in Shares)	(439,000)	(647,000)	(594,000)
Weighted Average Exercise Price Exercised				$ 11.39	$ 8.00	$ 6.44
Number of Shares Cancelled/Forfeited (in Shares)	(179,000)	(44,000)	(40,000)
Weighted Average Exercise Price Cancelled/Forfeited				$ 19.42	$ 16.03	$ 7.73
Number of Shares Outstanding (in Shares)	2,703,000	2,703,000	2,423,000
Weighted Average Exercise Price Outstanding				$ 17.79	$ 14.08	$ 9.12	$ 7.19
Aggregate Intrinsic Value Outstanding (in Dollars)								$ 45,397
Exercisable at December 31, 2011 (in Shares)	863,000
Exercisable at December 31, 2011				$ 15.36
Exercisable at December 31, 2011 (in Dollars)								$ 16,613

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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