Note 7 - Loans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Loans Receivable Held-for-sale, Amount	$ 3,709,000		$ 760,000
Increase (Decrease) in Loans Held-for-sale	3,000,000
Transfer of Portfolio Loans and Leases to Held-for-sale	16,000,000
Gain (Loss) on Sale of Loans and Leases	(278,000)
Impaired Financing Receivable, Recorded Investment	275,200,000		322,000,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans	22.40%		25.60%
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	495,000,000,000
Loans Sold [Member]
Increase (Decrease) in Loans Held-for-sale	13,000,000
Held For Sale [Member]
Gain (Loss) on Sale of Loans and Leases	26,000
Construction Residential Member
Loans Receivable Held-for-sale, Amount	500,000
Commercial Real Estate Other Receivable [Member]
Loans Receivable Held-for-sale, Amount	3,200,000
Nonaccrual Loans [Member]
Impaired Financing Receivable, Recorded Investment	131,500,000		201,200,000
Nonaccrual Loans Held For Sale [Member]
Impaired Financing Receivable, Recorded Investment	500,000,000,000		760,000
Accruing Troubled Debt Restructuring Member
Impaired Financing Receivable, Recorded Investment	143,200,000		120,000,000
Reduction Of Stated Interest Rate Member | Minimum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	ten
Reduction Of Stated Interest Rate Member | Maximum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	four
Extension of Maturity Date [Member] | Minimum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	ten
Extension of Maturity Date [Member] | Maximum [Member]
Periods Range For Modifications Involving Extension Of Maturity Date Of Accruing Troubled Debt Restructurings	4
Commercial Real Estate Other Receivable [Member]
Financing Receivable Modification, Number Of Contracts	2
Financing Receivable, Modifications, Recorded Investment	6.4
Commercial Loans Member | Accruing Troubled Debt Restructuring Member
Financing Receivable, Modifications, Number of Contracts	5		4
Commercial Loans Member
Financing Receivable Modification, Number Of Contracts	3
Financing Receivable, Modifications, Recorded Investment	1,400,000
Land Loan Member
Troubled Debt Restructurings, Total	1,200,000
Financing Receivable, Modifications, Number of Contracts	1
Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	143,200,000		120,000,000
Impaired Financing Receivable, Modifications, Related Allowance	2,200,000		1,400,000
Non Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	21,500,000		50,900,000
Impaired Financing Receivable, Modifications, Related Allowance	288,000,000,000		1,600,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	4,018,000	1,104,000
Retail Shopping And Commercial Use Building Member
Troubled Debt Restructurings, Total	80,700,000
Financing Receivable, Modifications, Number of Contracts	13
Office And Commercial Use Building Member
Troubled Debt Restructurings, Total	29,000,000
Financing Receivable, Modifications, Number of Contracts	11
Hotel Loan Member
Troubled Debt Restructurings, Total	12,800,000
Financing Receivable, Modifications, Number of Contracts	2
Single Family Residential Loan Member
Troubled Debt Restructurings, Total	19,300,000
Financing Receivable, Modifications, Number of Contracts	11
Multi-Family Residences [Member]
Troubled Debt Restructurings, Total	805,000
Financing Receivable, Modifications, Number of Contracts	2
Land Loan Member
Troubled Debt Restructurings, Total	537,000
Financing Receivable, Modifications, Number of Contracts	1
Commercial Loans Member
Troubled Debt Restructurings, Total	$ 106,000
Financing Receivable, Modifications, Number of Contracts	4
Minimum [Member]
Period Loan Is In Payment Default	60
Maximum [Member]
Period Loan Is In Payment Default	90