Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	3.25%	3.25%
Trust Preferred Securities Due 12/30/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	2.80%	2.80%
Trust Preferred Securities Due 6/30/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	1.75%
Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	1.37%
Trust Preferred Securities Due 12/3/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	2.88%
Trust Preferred Securities Due 12/13/2034 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	2.00%
Trust Preferred Securities, Due 6/6/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
Floating rate	1.57%
Minimum [Member] | Federal Home Loan Bank Advances [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
FHLB advances, interest rate	0.35%	0.35%
Maximum [Member] | Federal Home Loan Bank Advances [Member]
Note 10 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]
FHLB advances, interest rate	7.38%	7.38%