Note 2 - Business Combination (Details) - Net Assets Acquired (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Core Deposits [Member] Firstbank Corporation [Member]	Jun. 30, 2014 Servicing Contracts [Member] Firstbank Corporation [Member]	Jun. 30, 2014 Firstbank Corporation [Member]	Jun. 01, 2014 Firstbank Corporation [Member]
Assets
Cash and cash equivalents					$ 91,806,000
Securities					358,599,000
Total loans					943,662,000
Premises and equipment					24,049,000
Intangibles			17,478,000	7,389,000
Other assets					8,500,000
Total Assets					1,451,483,000	1,500,000,000
Liabilities
Deposits					1,229,609,000
Borrowings					87,615,000
Other liabilities					10,155,000
Total Liabilities					1,327,379,000
Net Identifiable Assets Acquired					124,104,000
Goodwill	$ 50,870,000	$ 0			$ 50,870,000	$ 50,900,000