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Note 13 - Condensed Financial Statements of Parent Company (Details) - Condensed Statements of Income (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income |  |  |
Interest on securities – taxable | $ 6,707 | $ 6,613 | $ 6,745
Interest on securities – nontaxable | 6,388 | 6,463 | 6,532
Realized securities losses, net | 59 | 104 | 90
Other income | 770 | 472 | 449
Expenses |  |  |
Income before income tax benefit and equity in undistributed net income of subsidiaries | 23,107 | 22,992 | 22,885
Applicable income tax benefit | 5,317 | 5,245 | 5,247
Net income | 17,790 | 17,747 | 17,638
Parent Company [Member] |  |  |
Income |  |  |
Dividends from subsidiaries | 7,882 | 7,639 | 7,258
Interest on securities – taxable | 2 | 5 | 17
Interest on securities – nontaxable | 19 | 33 | 42
Realized securities losses, net | (94) |  |
Other income | 1,219 | 1,213 | 1,210
| 9,028 | 8,890 | 8,527
Expenses |  |  |
Other expenses | 1,943 | 1,791 | 1,794
Income before income tax benefit and equity in undistributed net income of subsidiaries | 7,085 | 7,099 | 6,733
Applicable income tax benefit | 160 | 136 | 148
Income before equity in undistributed net income of subsidiaries | 7,245 | 7,235 | 6,881
Equity in undistributed net income of subsidiaries | 10,545 | 10,512 | 10,757
Net income | $ 17,790 | $ 17,747 | $ 17,638

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