Note 5 - Loans Acquired (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Loans Acquired [Abstract]
Acquired Loans, Covered By FDIC Loss Share Agreements	$ 163.7	$ 210.8
Certain Loans Acquired In Transfer Accretable Yield Adj	19.5
FDIC Indemnification Asset Accretable Yield Adj	16.9
Certain Loans Acquired In Transfer Accretable Yield Adj Current Year Increase Decrease	5.5
FDIC Indemnification Asset Accretable Yield Adj Current Year Increase Decrease	$ (5.5)