Note 13 - Fair Value Measurements (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Impaired Loans [Member] | Minimum [Member]
Fair Value Inputs, Discount Rate	0.00%	0.00%
Impaired Loans [Member] | Maximum [Member]
Fair Value Inputs, Discount Rate	30.00%	30.00%
Minimum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Discount Rate	0.00%	0.00%
Maximum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Discount Rate	30.00%	30.00%