Note 5 - Loans (Details) (USD $)	1 Months Ended		12 Months Ended																							12 Months Ended				12 Months Ended				12 Months Ended
	Mar. 31, 2012	Jul. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Nonaccrual Loans [Member]	Dec. 31, 2012 Nonaccrual Loans [Member]	Dec. 31, 2011 Nonaccrual Loans [Member]	Dec. 31, 2013 Accruing Troubled Debt Restructuring Member Commercial Loans Member	Dec. 31, 2012 Accruing Troubled Debt Restructuring Member Commercial Loans Member	Dec. 31, 2011 Accruing Troubled Debt Restructuring Member Commercial Loans Member	Dec. 31, 2013 Accruing Troubled Debt Restructuring Member Residential Mortgage Loans [Member]	Dec. 31, 2012 Accruing Troubled Debt Restructuring Member Residential Mortgage Loans [Member]	Dec. 31, 2011 Accruing Troubled Debt Restructuring Member Residential Mortgage Loans [Member]	Dec. 31, 2013 Accruing Troubled Debt Restructuring Member	Dec. 31, 2012 Accruing Troubled Debt Restructuring Member	Dec. 31, 2011 Accruing Troubled Debt Restructuring Member	Dec. 31, 2012 Nonaccrual Loans Held For Sale [Member]	Dec. 31, 2013 Real Estate Loans [Member]	Dec. 31, 2012 Real Estate Loans [Member]	Dec. 31, 2013 Commercial Loans Member	Dec. 31, 2012 Commercial Loans Member	Dec. 31, 2013 Commercial Real Estate Loans [Member]	Dec. 31, 2013 Construction [Member]	Dec. 31, 2013 Residential Mortgage Loans [Member]	Dec. 31, 2013 Accruing Troubled Debt Restructuring Member	Dec. 31, 2012 Accruing Troubled Debt Restructuring Member	Dec. 31, 2011 Accruing Troubled Debt Restructuring Member	Dec. 31, 2010 Accruing Troubled Debt Restructuring Member	Dec. 31, 2013 Non Accruing Troubled Debt Restructuring Member	Dec. 31, 2012 Non Accruing Troubled Debt Restructuring Member	Dec. 31, 2011 Non Accruing Troubled Debt Restructuring Member	Dec. 31, 2010 Non Accruing Troubled Debt Restructuring Member	Dec. 31, 2013 Retail Shopping And Commercial Use Building Member	Dec. 31, 2012 Retail Shopping And Commercial Use Building Member	Dec. 31, 2013 Office And Commercial Use Building Member	Dec. 31, 2012 Office And Commercial Use Building Member	Dec. 31, 2013 Hotel Loan Member	Dec. 31, 2012 Hotel Loan Member	Dec. 31, 2013 Single Family Residential Loan Member	Dec. 31, 2012 Single Family Residential Loan Member	Dec. 31, 2013 Land Loan Member	Dec. 31, 2012 Land Loan Member	Dec. 31, 2013 Commercial Loans Member	Dec. 31, 2012 Commercial Loans Member	Dec. 31, 2013 Multi-Family Residences [Member]	Dec. 31, 2012 Multi-Family Residences [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2012 Maximum [Member]
Note 5 - Loans (Details) [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged																			$ 1,600,000,000	$ 1,600,000,000
Loans Pledged with Federal Reserve Bank																					119,100,000	211,600,000
Servicing Asset at Fair Value, Amount			197,600,000																		53,300,000		13,300,000	12,000,000	119,000,000
Mortgage Loans on Real Estate, Cost of Mortgages Sold	7,900,000	24,500,000
Percentage of Loan Participation to Contractual Balance	92.50%	98.00%
Impaired Financing Receivable, Recorded Investment			200,780,000	248,597,000		83,200,000	103,900,000								117,600,000			144,700,000																	68,100,000
Impaired Financing Receivable, Average Recorded Investment			221,152,000	277,776,000	361,353,000
Impaired Financing Receivable, Interest Income, Accrual Method			5,599,000	9,305,000	5,330,000	5,851,000	6,621,000	13,049,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans			23.90%	23.20%
Troubled Debt Restructurings, Total																										117,600,000	144,700,000			38,800,000	47,700,000			44,200,000		28,600,000		17,200,000		20,000,000		1,600,000		5,300,000
Impaired Financing Receivable, Modifications, Related Allowance																										6,900,000	1,100,000			2,200,000	7,800,000
Financing Receivable, Modifications, Number of Contracts			64	61																														13	16	10	15	4	2	25	17	2	2	5	6	5	3
Troubled Debt Restructurings, New Restructurings			27,100,000																							21,382,000	53,958,000	60,863,000		6,226,000	12,304,000	13,269,000
Financing Receivable, Modifications, Recorded Investment									$ 14,736,000	$ 3,964,000	$ 15,120,000	$ 6,105,000	$ 4,716,000	$ 3,368,000	$ 117,597,000	$ 144,695,000	$ 120,016,000									$ 117,597,000	$ 144,695,000	$ 120,016,000	$ 136,800,000	$ 38,769,000	$ 47,731,000	$ 50,870,000	$ 28,146,000				$ 40,400,000		$ 12,400,000		$ 19,100,000		$ 2,300,000		$ 1,300,000	$ 748,000	$ 1,100,000
Period Loan Is In Payment Default																																																60	90
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			0