Note 7 - Bank Premises and Equipment, Net (Details) - Branch Buildings [Member] $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Note 7 - Bank Premises and Equipment, Net (Details) [Line Items]
Sale Leaseback Transaction, Number of Property Sold	3
Sale Leaseback Transaction, Gain (Loss), Net	$ 12.7
Sale Leaseback Transaction, Current Period Gain Recognized	6.5
Sale Leaseback Transaction, Deferred Gain, Net	$ 6.2