Note 5 - Loans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Collateral Dependent Impaired Loans, Measured By Third Party Appraisals	$ 86,100,000
Collateral Dependent Impaired Loans, Measured By Third Party Appraisals, Percentage	78.10%
Collateral Dependent Impaired Loans, Measured Internally	24,500,000
Collateral Dependent Impaired Loans, Measured Internally, Percentage	21.90%
Impaired Financing Receivable, Recorded Investment	145,563,000		171,001,000
Commitments and Contingencies
Substandard [Member] | Loans Held For Sale [Member]
Impaired Financing Receivable, Recorded Investment	9,900,000		5,300,000
Substandard [Member]
Impaired Financing Receivable, Recorded Investment	104,484,000	[1]	116,633,000	[1]
Extension Of Credit [Member]
Commitments and Contingencies	54,700,000
Extension Of Lines Of Credit [Member]
Commitments and Contingencies	$ 138,900,000

[1] The tables above do not include $9.9 million and $5.5 million of Substandard loans held for sale at March 31, 2013 and December 31, 2012, respectively.