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Note 11 - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current:      
Federal $ 98 $ 814 $ 124
State 493 395 35
591 1,209 159
Deferred:      
Federal 10,782 6,111 2,909
State 2,119 1,401 688
12,901 7,512 3,597
Total income tax expense $ 13,492 $ 8,721 $ 3,756