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Note 7 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax at federal statutory rate	$ 243,529	$ 241,571	$ 211,610
State tax, net of federal effect	19,165	18,671	17,357
Nondeductible meals and entertainment	1,419	1,420	1,395
Change in effective state tax rate, net of federal benefit	(1,055)	1,761	256
Other, net	649	(455)	(809)
Total tax expense	$ 263,707	$ 262,968	$ 229,809

X

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible meals and entertainment expense.

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