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Note 5 - Income Taxes
9 Months Ended
Sep. 30, 2012
Income Tax Disclosure [Text Block]
(5)  Income Taxes

Our effective income tax rate decreased to 39.3% for the first nine months of 2012 from 43.4% for the first nine months of 2011, primarily due to a decrease to our deferred income tax liability as a result of a change in income apportionment for several states.

The federal statute of limitations remains open for 2009 and forward.  We file tax returns in numerous state jurisdictions with varying statutes of limitations.