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Note 22 - Parent Company Condensed Financial Information (Details) - Condensed Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Operating Activities:                          
Net income $ 1,232 $ 1,258 $ 1,527 $ 1,522 $ 1,300 $ 1,247 $ 1,429 $ 1,214 $ 1,197 $ 2,701 $ 2,822 $ 5,607 $ 5,087
Adjustments to reconcile net income to cash and cash equivalents provided by operating activities:                          
Net change in other assets and liabilities                   (735) (592) (272) 449
Financing Activities:                          
Purchase of treasury stock                   0 (844) (908) (19)
Cash dividends paid                   (1,169) (1,174) (2,325) (2,241)
Net increase (decrease) in cash and cash equivalents                   6,404 4,292 22,107 (10,675)
Parent Company [Member]                          
Operating Activities:                          
Net income                       5,594 5,074
Adjustments to reconcile net income to cash and cash equivalents provided by operating activities:                          
Equity in undistributed net income of subsidiaries                       (1,705) (2,382)
Net change in other assets and liabilities                       (71) (9)
Net cash provided by operating activities                       3,818 2,683
Investing Activities:                          
Investment in captive insurance subsidiary                       (250) 0
Cost method equity investment                       (171) (540)
Net cash used in investing activities                       (421) (540)
Financing Activities:                          
Purchase of treasury stock                       (908) (19)
Cash dividends paid                       (2,312) (2,228)
Net cash used in financing activities                       (3,220) (2,247)
Net increase (decrease) in cash and cash equivalents                       177 (104)
Cash and cash equivalents at beginning of year         $ 132       $ 236 $ 309 $ 132 132 236
Cash and cash equivalents at end of year   $ 309       $ 132           $ 309 $ 132