Note 11 - Stock Based Compensation (Detail) - Stock Incentive Plans Activity - Stock Options (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Balance, December 31, 2011	811,176
Balance, December 31, 2011 (in Dollars per share)	$ 12.69
Forfeited	(59,793)
Forfeited (in Dollars per share)	$ 9.12
Expired	(90,000)
Expired (in Dollars per share)	$ 31.67
Exercised	(407,884)
Exercised (in Dollars per share)	$ 13.02
Balance, December 31, 2012	253,499
Balance, December 31, 2012 (in Dollars per share)	$ 6.26
Balance, December 31, 2012 (in Dollars)	$ 7.9
Balance, December 31, 2012	1 year 219 days
Exercisable, December 31, 2012	253,499
Exercisable, December 31, 2012 (in Dollars per share)	$ 6.26
Exercisable, December 31, 2012 (in Dollars)	$ 7.9
Exercisable, December 31, 2012	1 year 219 days

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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

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