Note 5 - Loans (Details) - Allowance for loan losses: (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for loan losses: [Abstract]
Balance	$ 31,104	$ 30,344	$ 30,344
Provision for loan losses	9,500	11,000
Charge-off's	(8,888)	(10,883)	(21,269)
Recoveries	639	438	1,029
Balance	$ 32,355	$ 30,899	$ 31,104