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Note 11 - Federal and State Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax at the statutory federal rate									$ 6,042	$ 11,876	$ 7,552
Income tax at the statutory federal rate									34.00%	34.00%	34.00%
Nondeductible expenses									$ 130	$ 149	$ 154
Nondeductible expenses									0.70%	0.40%	0.70%
State income taxes/other—net of federal benefit									$ 499	$ 1,467	$ 1,015
State income taxes/other—net of federal benefit									2.80%	4.20%	4.60%
Total income tax expense	$ (270)	$ (2,152)	$ (2,442)	$ (1,807)	$ (2,048)	$ (3,567)	$ (4,471)	$ (3,406)	$ 6,671	$ 13,492	$ 8,721
Total income tax expense									37.50%	38.60%	39.30%

X

- Definition

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage 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 expenses.

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