Note 10 - Other Borrowings and Subordinated Debentures - Long-term Debt (Details) (Parentheticals)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal Home Loan Bank Advances [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage	0.46%	0.46%
Federal Home Loan Bank Advances [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	7.37%	7.37%
Note Payable Due 10/15/2020 [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.85%	3.85%
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.80%	2.80%
Trust Preferred Securities Due 6/30/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.75%	1.75%
Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.37%	1.37%
Trust Preferred Securities Due 12/3/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.88%	2.88%
Trust Preferred Securities Due 12/13/2034 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.00%	2.00%
Trust Preferred Securities, Due 6/6/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.57%	1.57%