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Note 12 - Income Taxes (Details) - Components of Income Tax Expense - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ 31,587 | $ 36,180 | $ 62,254
State |  |  |  |  |  |  |  |  | 26,396 | 14,481 | 23,295
Total Current |  |  |  |  |  |  |  |  | 57,983 | 50,661 | 85,549
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 3,738 | 23,783 | (11,162)
State |  |  |  |  |  |  |  |  | (1,734) | 7,521 | (3,952)
Total Deferred |  |  |  |  |  |  |  |  | 2,004 | 31,304 | (15,114)
Total income tax expense | $ 16,787 | $ 12,098 | $ 9,738 | $ 21,364 | $ 21,021 | $ 22,313 | $ 20,741 | $ 17,890 | $ 59,987 | $ 81,965 | $ 70,435

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