Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Nine months ended September 30, 2014 (actual)	$ 1,056,000	$ 1,163,000	$ 3,219,000	$ 3,547,000
Estimate for year ended December 31, 2014	4,270,000		4,270,000
2015	3,856,000		3,856,000
2016	3,504,000		3,504,000
2017	3,077,000		3,077,000
2018	1,921,000		1,921,000
2019	538,000		538,000
Core Deposits [Member]
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Nine months ended September 30, 2014 (actual)			2,973,000
Estimate for year ended December 31, 2014	3,946,000		3,946,000
2015	3,594,000		3,594,000
2016	3,292,000		3,292,000
2017	2,913,000		2,913,000
2018	1,892,000		1,892,000
2019	538,000		538,000
Mechant Draft Processing [Member]
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Nine months ended September 30, 2014 (actual)			246,000
Estimate for year ended December 31, 2014	324,000		324,000
2015	262,000		262,000
2016	212,000		212,000
2017	164,000		164,000
2018	$ 29,000		$ 29,000