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Note 10 - Income Taxes (Detail) (USD $)	3 Months Ended
Note 10 - Income Taxes (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Tax Expense (Benefit)	$ 16,887,000	$ 16,547,000
Effective Income Tax Rate, Continuing Operations	36.90%	36.40%
Income Tax Refund Receivable			$ 12,400,000

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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