Note 4 - Fair Value (Detail) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Impaired loans		$ 30,289
Other Real Estate Owned	3,541	2,925
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans	33,769	36,388
Other Real Estate Owned	3,541	1,296
Other repossessed assets	320	250
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Other Real Estate Owned	0	0
Other repossessed assets	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Other Real Estate Owned	0	0
Other repossessed assets	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	33,769	36,388
Other Real Estate Owned	3,541	1,296
Other repossessed assets	$ 320	$ 250