Note Q - Stock-Based Compensation (Detail) - (Table 5) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2011
Outstanding at January 1, 2011	2,703,000
Outstanding at January 1, 2011 (in Dollars per share)	$ 14.08
Granted	563,000
Granted (in Dollars per share)	$ 26.10
Exercised	(313,000)
Exercised (in Dollars per share)	$ 11.13
Cancelled/Forfeited	(158,000)
Cancelled/Forfeited (in Dollars per share)	$ 19.95
Outstanding at June 30, 2011	2,795,000
Outstanding at June 30, 2011 (in Dollars per share)	$ 16.50
Outstanding at June 30, 2011	5.0
Outstanding at June 30, 2011 (in Dollars)	$ 58,632
Exercisable at June 30, 2011	771,000
Exercisable at June 30, 2011 (in Dollars per share)	$ 12.95
Exercisable at June 30, 2011	4.5
Exercisable at June 30, 2011 (in Dollars)	$ 18,925

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 period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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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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As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options that are exercisable.

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Number of share options (or share units) exercised during the current period.

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