Note 7 - Loans (Details) - Troubled Debt Restructurings Modified (USD $) In Thousands, unless otherwise specified			9 Months Ended								3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Commercial Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Commercial Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Commercial Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Commercial Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Residential Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Residential Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Total [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Total [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2012 Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) - Troubled Debt Restructurings Modified [Line Items]
No. of Loans			9	8	3	15	11	7	23	30
Pre-Modification Recorded Investment			$ 11,705	$ 2,144	$ 7,474	$ 59,299	$ 3,736	$ 2,895	$ 22,915	$ 64,338
Post-Modification Recorded Investment			10,516	2,144	7,474	55,610	3,658	2,895	21,648	60,649
Charge-offs			1,189	0	0	3,689	78	0	1,267	3,689	0	(251)	(78)	(251)
Specific Reserve	$ 23,362	$ 12,183	$ 71	$ 75	$ 191	$ 0	$ 125	$ 70	$ 387	$ 145