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Note 13 - Condensed Financial Statements of Parent Company - Condensed Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income |  |  |
Interest on securities – nontaxable | $ 5,123 | $ 5,438 | $ 5,826
Other income | 1,289 | 1,295 | 1,037
Expenses |  |  |
Income before income tax benefit and equity in undistributed net income of subsidiaries | 18,894 | 20,573 | 22,092
Applicable income tax benefit | 3,952 | 4,740 | 5,178
Net income | 14,942 | 15,833 | 16,914
Parent Company [Member] |  |  |
Income |  |  |
Dividends from subsidiaries | 9,421 | 7,930 | 7,853
Interest on securities – taxable | 2 | 3 | 2
Interest on securities – nontaxable | 0 | 0 | 1
Other income | 987 | 1,208 | 1,250
Total income | 10,410 | 9,141 | 9,106
Expenses |  |  |
Other expenses | 1,992 | 2,051 | 2,046
Income before income tax benefit and equity in undistributed net income of subsidiaries | 8,418 | 7,090 | 7,060
Applicable income tax benefit | 628 | 210 | 136
Income before equity in undistributed net income of subsidiaries | 9,046 | 7,300 | 7,196
Equity in undistributed net income of subsidiaries | 5,896 | 8,533 | 9,718
Net income | $ 14,942 | $ 15,833 | $ 16,914

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