Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
New restructurings	$ 10,669	$ 14,765	$ 15,485	$ 53,524
Restructured loans restored to accrual status	5,397	3,957	6,851	6,810
Charge-offs	0	(251)	(78)	(251)
Payments	(15,274)	(1,569)	(48,663)	(4,124)
Restructured loans placed on nonaccrual	(316)	0	(2,350)	(5,824)
Accruing Troubled Debt Restructuring [Member] | Beginning of Period [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
Balance at	115,464	153,249	144,695	120,016
Balance at	115,464	153,249	144,695	120,016
Accruing Troubled Debt Restructuring [Member] | End of Period [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
Balance at	115,940	170,151	115,940	170,151
Balance at	115,940	170,151	115,940	170,151
Non Accruing Troubled Debt Restructuring Member
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
New restructurings	2,415	1,153	6,163	7,124
Restructured loans restored to accrual status	(5,397)	(3,957)	(6,851)	(6,810)
Charge-offs	(1,188)	0	(2,121)	(4,285)
Payments	(1,062)	(1,405)	(3,664)	(33,647)
Restructured loans placed on nonaccrual	316	0	2,350	5,824
Non Accruing Troubled Debt Restructuring Member | Beginning of Period [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
Balance at	48,524	23,285	47,731	50,870
Balance at	48,524	23,285	47,731	50,870
Non Accruing Troubled Debt Restructuring Member | End of Period [Member]
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]
Balance at	43,608	19,076	43,608	19,076
Balance at	$ 43,608	$ 19,076	$ 43,608	$ 19,076