Note 7 - Loans (Detail) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Loans Receivable Held-for-sale, Amount	$ 500,000	$ 760,000
Increase (Decrease) in Loans Held-for-sale	260,000
Transfer of Portfolio Loans and Leases to Held-for-sale	16,000,000
Impaired Financing Receivable, Recorded Investment	276,571,000	321,973,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans	21.90%	25.60%
Financing Receivables Impaired Troubled Debt Restructuring Defaulted Within 12 Months Write Down	502,000
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
Construction Residential Member
Loans Receivable Held-for-sale, Amount	500,000
Nonaccrual Loans [Member]
Impaired Financing Receivable, Recorded Investment	122,800,000	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	153,200,000	120,000,000
Extension of Maturity Date [Member] | Minimum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	two
Extension of Maturity Date [Member] | Maximum [Member]
Periods Range For Modifications Involving Extension Of Maturity Date Of Accruing Troubled Debt Restructurings	4
Reduction Of Stated Interest Rate Member | Minimum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	two
Reduction Of Stated Interest Rate Member | Maximum [Member]
Periods Range For Modifications Involving Reduction Of Stated Interest Rate Of Accruing Troubled Debt Restructurings	four
Commercial Real Estate Other Receivable [Member]
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	5
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	13,300,000
Commercial Loans Member | Accruing Troubled Debt Restructuring Member
Financing Receivable, Modifications, Number of Contracts	5	5
Commercial Loans Member
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	3
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	1,400,000
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
Mortgage Troubled Debt Restructuring [Member]
Financing Receivable Modification Number Of Contracts Defaulted Within 12 Months	1
Financing Receivable Modifications Recorded Investment Defaulted Within 12 Months	1,200,000
Minimum [Member]
Period Loan Is In Payment Default	60
Maximum [Member]
Period Loan Is In Payment Default	90
Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	153,200,000	120,000,000
Impaired Financing Receivable, Modifications, Related Allowance	1,300,000	1,400,000
Non Accruing Troubled Debt Restructuring Member
Troubled Debt Restructurings, Total	23,300,000	50,900,000
Impaired Financing Receivable, Modifications, Related Allowance	206,000	1,600,000
Retail Shopping And Commercial Use Building Member
Troubled Debt Restructurings, Total	81,800,000
Financing Receivable, Modifications, Number of Contracts	14
Office And Commercial Use Building Member
Troubled Debt Restructurings, Total	37,600,000
Financing Receivable, Modifications, Number of Contracts	10
Hotel Loan Member
Troubled Debt Restructurings, Total	12,700,000
Financing Receivable, Modifications, Number of Contracts	2
Single Family Residential Loan Member
Troubled Debt Restructurings, Total	19,100,000
Financing Receivable, Modifications, Number of Contracts	12
Multi-Family Residences [Member]
Troubled Debt Restructurings, Total	1,100,000
Financing Receivable, Modifications, Number of Contracts	3
Land Loan Member
Troubled Debt Restructurings, Total	413,000
Financing Receivable, Modifications, Number of Contracts	1
Commercial Loans Member
Troubled Debt Restructurings, Total	$ 542,000
Financing Receivable, Modifications, Number of Contracts	5