Note 7 - Segment Information (Detail) - Segment Reporting (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Net interest income	$ 8,421	$ 8,912
Provision expense	31	1,316
Noninterest income	3,940	3,479
Noninterest expense	7,948	7,332
Tax expense	1,159	1,121
Net income	3,223	2,622
Assets	834,908		769,223
Banking [Member]
Net interest income	7,149	7,657
Provision expense	(65)	1,211
Noninterest income	3,493	3,065
Noninterest expense	7,296	6,727
Tax expense	830	796
Net income	2,581	1,988
Assets	821,720	840,691
Consumer Finance [Member]
Net interest income	1,272	1,255
Provision expense	96	105
Noninterest income	447	414
Noninterest expense	652	605
Tax expense	329	325
Net income	642	634
Assets	13,188	13,183
Reportable Segment [Member]
Net interest income	8,421	8,912
Provision expense	31	1,316
Noninterest income	3,940	3,479
Noninterest expense	7,948	7,332
Tax expense	1,159	1,121
Net income	3,223	2,622
Assets	$ 834,908	$ 853,874