Note 5 - Loans Acquired (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Note 5 - Loans Acquired (Details) [Line Items]
Certain Loans Acquired In Transfer Accretable Yield Adjustment	$ 25.1
FDIC Indemnification Asset Accretable Yield Adjustment	18.6
Certain Loans Acquired In Transfer Accretable Yield Adj Current Year Increase Decrease	9.6
FDIC Indemnification Asset Accretable Yield Adj Current Year Increase Decrease	(10.6)
Net Addition to Pre-tax Income Due to Remaining Accretable Yield Adjustments	1.0
Number of Impaired Pools	0
Number of Impaired Loans	0
Allowance for Loan and Lease Losses, Loans Acquired	0	0
Purchased Credit Impaired Loans [Member] | Metropolitan [Member]
Note 5 - Loans Acquired (Details) [Line Items]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share		28.4
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross		52.8
Loans Acquired Discount		24.5
Metropolitan [Member]
Note 5 - Loans Acquired (Details) [Line Items]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share		429.0
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross		442.0
Loans Acquired Discount		13.0
Acquired Loans, Covered By FDIC Loss Share Agreements	$ 121.5	$ 146.7