Note 7 - Loans (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Loans Receivable Held-for-sale, Amount	$ 0	$ 760,000
Transfer of Portfolio Loans and Leases to Held-for-sale	16,000,000
Transfer of Loans Held-for-sale to Portfolio Loans	500,000
Impaired Financing Receivable, Recorded Investment	265,096,000	321,973,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans	22.10%	25.60%
Loans Sold [Member]
Increase (Decrease) in Loans Held-for-sale	16,200,000
Held For Sale [Member]
Gain (Loss) on Sale of Loans and Leases	26,000
Nonaccrual Loans [Member]
Impaired Financing Receivable, Recorded Investment	94,900,000	201,200,000
Accruing Troubled Debt Restructuring Member
Impaired Financing Receivable, Recorded Investment	170,200,000	120,000,000
Nonaccrual Loans Held For Sale [Member]
Impaired Financing Receivable, Recorded Investment		760,000
Extension of Maturity Date [Member] | Minimum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	2 months
Extension of Maturity Date [Member] | Maximum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	7 years
Reduction Of Stated Interest Rate Member | Minimum [Member]
Periods Range For Modifications Involving Extension Of Maturity Date Of Accruing Troubled Debt Restructurings	2 months
Reduction Of Stated Interest Rate Member | Maximum [Member]
Periods Range For Modifications Involving Extension Of Maturity Date Of Accruing Troubled Debt Restructurings	7 years
Commercial Real Estate Other Receivable [Member]
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	4
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	12,000,000
Land Loan Member
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	1
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	1,200,000
Residential Mortgage Loans [Member] | Accruing Troubled Debt Restructuring Member
Financing Receivable, Modifications, Number of Contracts	7	3
Residential Mortgage Loans [Member]
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	1
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	1,200,000
Commercial Loans Member | Accruing Troubled Debt Restructuring Member
Financing Receivable, Modifications, Number of Contracts	8	11
Commercial Loans Member
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	1
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	234,000
Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	170,200,000	120,000,000
Impaired Financing Receivable, Modifications, Related Allowance	1,100,000	1,400,000
Non Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	19,100,000	50,900,000
Impaired Financing Receivable, Modifications, Related Allowance	208,000	1,600,000
Retail Shopping And Commercial Use Building Member
Troubled Debt Restructurings, Total	94,700,000
Financing Receivable, Modifications, Number of Contracts	18
Office And Commercial Use Building Member
Troubled Debt Restructurings, Total	37,400,000
Financing Receivable, Modifications, Number of Contracts	10
Hotel Loan Member
Troubled Debt Restructurings, Total	12,600,000
Financing Receivable, Modifications, Number of Contracts	2
Single Family Residential Loan Member
Troubled Debt Restructurings, Total	19,000,000
Financing Receivable, Modifications, Number of Contracts	15
Land Loan Member
Troubled Debt Restructurings, Total	2,400,000
Financing Receivable, Modifications, Number of Contracts	2
Warehouse Loan [Member]
Troubled Debt Restructurings, Total	1.6
Financing Receivable, Modifications, Number of Contracts	2
Unsecured Commercial Loans [Member]
Financing Receivable, Modifications, Number of Contracts	6
Financing Receivable, Modifications, Recorded Investment	1,400,000
Multi-Family Residences [Member]
Troubled Debt Restructurings, Total	$ 1,100,000
Financing Receivable, Modifications, Number of Contracts	3
Minimum [Member]
Period Loan Is In Payment Default	60
Maximum [Member]
Period Loan Is In Payment Default	90