Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans (USD $)	12 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2013 Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2012 Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member Beginning of Period [Member]	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2013 Non Accruing Troubled Debt Restructuring Member End of Period [Member]	Jun. 30, 2012 Non Accruing Troubled Debt Restructuring Member End of Period [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
Beginning balance						$ 130,215,000	$ 143,233,000	$ 144,695,000	$ 120,016,000	$ 115,464,000	$ 153,249,000	$ 115,464,000	$ 153,249,000					$ 49,878,000	$ 21,543,000	$ 47,731,000	$ 50,870,000	$ 48,524,000	$ 23,285,000	$ 48,524,000	$ 23,285,000
New restructurings		0	17,047,000	4,816,000	38,759,000									1,686,000	733,000	3,748,000	5,971,000
Restructured loans restored to accrual status		824,000	0	1,454,000	2,853,000									(824,000)	0	(1,454,000)	(2,853,000)
Charge-offs	254,000	(78,000)	0	(78,000)	0									(254,000)	(267,000)	(933,000)	(4,285,000)
Payments		(15,497,000)	(1,207,000)	(33,389,000)	(2,555,000)									(1,962,000)	(4,548,000)	(2,602,000)	(32,242,000)
Restructured loans placed on nonaccrual		0	(5,824,000)	(2,034,000)	(5,824,000)									0	5,824,000	2,034,000	5,824,000
Ending balance						$ 130,215,000	$ 143,233,000	$ 144,695,000	$ 120,016,000	$ 115,464,000	$ 153,249,000	$ 115,464,000	$ 153,249,000					$ 49,878,000	$ 21,543,000	$ 47,731,000	$ 50,870,000	$ 48,524,000	$ 23,285,000	$ 48,524,000	$ 23,285,000