Note 9 - Income Taxes (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Tax Expense (Benefit) (in Dollars)	$ 548,000	$ 581,000	$ 857,000	$ 787,000
Income Tax Expense Benefit - PreTax Income Percent	7.70%	14.30%	8.20%	12.80%
Income Tax Benefit			0.90%
Income Tax Provision [Member]
Income Tax Expense (Benefit) (in Dollars)		600,000
Maximum [Member]
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority (in Dollars)	37,000,000		37,000,000
Minimum [Member]
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority (in Dollars)	$ 10,500,000		$ 10,500,000