Note 18 - Fair Value Measurements (Detail) - Fair Value of Financial Assets Measured on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
ASSETS
Impaired loans (1) (2) (collateral dependent)	$ 33,948		$ 40,108
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
ASSETS
Impaired loans (1) (2) (collateral dependent)	3,624	[1],[2]	10,173	[1],[2]
Foreclosed assets held for sale (1)	1,523	[1]	2,664	[1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
ASSETS
Impaired loans (1) (2) (collateral dependent)		[1],[2]		[1],[2]
Foreclosed assets held for sale (1)		[1]		[1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
ASSETS
Impaired loans (1) (2) (collateral dependent)		[1],[2]		[1],[2]
Foreclosed assets held for sale (1)		[1]		[1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
ASSETS
Impaired loans (1) (2) (collateral dependent)	3,624	[1],[2]	10,173	[1],[2]
Foreclosed assets held for sale (1)	$ 1,523	[1]	$ 2,664	[1]

[1] These amounts represent the resulting carrying amounts on the Consolidated Balance Sheets for impaired collateral dependent loans and foreclosed assets held for sale for which fair value re-measurements took place during the period.

[2] Specific allocations of $215,000 and $41,000 were related to the impaired collateral dependent loans for which fair value re-measurements took place during the periods ended September 30, 2012 and December 31, 2011, respectively.