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Note 7 - Segment Information (Details) - Segment Reporting (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]          
Net interest income $ 7,841 $ 8,053 $ 16,262 $ 16,965  
Provision expense (189) 524 (158) 1,840  
Noninterest income 1,965 1,974 5,905 5,453  
Noninterest expense 7,317 7,162 15,265 14,494  
Tax expense 736 622 1,895 1,743  
Net income 1,942 1,719 5,165 4,341  
Assets 752,112 801,372 752,112 801,372 769,223
Banking [Member]
          
Segment Reporting Information [Line Items]          
Net interest income 7,198 7,426 14,347 15,083  
Provision expense (200) 576 (265) 1,787  
Noninterest income 1,792 1,823 5,285 4,888  
Noninterest expense 6,706 6,588 14,002 13,315  
Tax expense 671 536 1,501 1,332  
Net income 1,813 1,549 4,394 3,537  
Assets 738,236 787,885 738,236 787,885  
Consumer Finance [Member]
          
Segment Reporting Information [Line Items]          
Net interest income 643 627 1,915 1,882  
Provision expense 11 (52) 107 53  
Noninterest income 173 151 620 565  
Noninterest expense 611 574 1,263 1,179  
Tax expense 65 86 394 411  
Net income 129 170 771 804  
Assets $ 13,876 $ 13,487 $ 13,876 $ 13,487