Annual report pursuant to Section 13 and 15(d)

Note 18 - Income Taxes - The Federal Income Tax Statutory Rates to Income Before Income Taxes (Details)

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Note 18 - Income Taxes - The Federal Income Tax Statutory Rates to Income Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income tax at statutory federal rate, amount $ 48,073 $ 38,786 $ 31,152
Income tax at statutory federal rate, pre-tax earnings 35.00% 35.00% 35.00%
State income tax, net of federal tax effect, amount $ 43 $ 254 $ 146
State income tax, net of federal tax effect, pre-tax earnings 0.03% 0.23% 0.16%
Tax-exempt income, net of expenses, amount $ (1,356) $ (1,322) $ (1,308)
Tax-exempt income, net of expenses, pre-tax earnings (0.99%) (1.20%) (1.47%)
Bank owned life insurance contracts, amount $ (1,096) $ (978) $ (917)
Bank owned life insurance contracts, pre-tax earnings (0.80%) (0.88%) (1.03%)
Excess tax benefit from stock compensation, amount $ (4,278) $ 4,788 $ (3)
Excess tax benefit from stock compensation, pre-tax earnings (3.11%) (4.32%)
Federal tax credits, amount $ (234) $ (2,652) $ (3,600)
Federal tax credits, pre-tax earnings (0.17%) (2.40%) (4.04%)
Enacted tax rate change $ 3,108    
Enacted tax rate change, pre-tax earnings 2.26%    
Other, amount $ (2) $ 39 $ (11)
Other, pre-tax earnings 0.04% (0.01%)
Effective income tax and rate, amount $ 44,258 $ 29,339 $ 25,465
Effective income tax and rate, pre-tax earnings 32.22% 26.47% 28.61%
Excess tax benefit from stock compensation $ 4,278 $ (4,788) $ 3
Excess tax benefit from stock compensation, amount $ 4,278 $ (4,788) $ 3
Excess tax benefit from stock compensation, pre-tax earnings (3.11%) (4.32%)