Note 9 - Other Borrowings and Subordinated Debentures (Detail) - Debt Components (Parentheticals)	Mar. 31, 2013	Dec. 31, 2012
FHLB Advances [Member] | Minimum [Member]
Interest rate on debt	0.96%	0.96%
FHLB Advances [Member] | Maximum [Member]
Interest rate on debt	8.41%	8.41%
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member]
Interest rate spread on trust preferred securities	2.80%	2.80%