Note R - Stock-Based Compensation (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended	21 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	May 27, 2007	May 26, 2006
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	9,144,000		9,144,000		9,144,000	3,487,500	2,700,000
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period	86,000	77,000	697,000	474,000
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable During Period Weighted Average Exercise Price (in Dollars per share)	$ 24.61	$ 14.97	$ 15.23	$ 10.27
Share Based Compensation Arrangement By Share-Based Payment Award Equity Options Nonvested Number	1,948,000	2,339,000	1,948,000	2,339,000	1,948,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)	$ 10,463	$ 10,752	$ 10,463	$ 10,752	$ 10,463
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				3.1	2.5
Employee Service Share Based Compensation Nonvested Restricted Stock Awards Total Compensation Cost Not Yet Recognized (in Dollars)	$ 12,609		$ 12,609		$ 12,609
Employee Service Share Based Compensation Nonvested Restricted Awards Total Compensation Cost Not Yet Recognized Period For Recognition			2.9

The weighted average period over which unrecognized compensation is expected to be recognized for restricted stock compensation plans, using a decimal to express in number of years.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of restricted stock awards made to employees under equity-based compensation awards that have yet to vest.

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- Definition

The number of non-vested equity-based payment instruments, including stock (or unit) options, that validly exist and are outstanding as of the balance sheet date

+ Details

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- Definition

The weighted-average price as of 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 that vested during the reporting period.

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- Definition

Number of options for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

+ References

+ Details

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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