Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	$ 249,856	$ 262,100
Gross unrealized gains	761	3,012
Gross unrealized losses	(4,116)	(610)
Fair value	246,501	264,502
State and Municipal [Member]
Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	8,270	11,247
Gross unrealized gains	206	283
Gross unrealized losses	(73)	0
Fair value	8,403	11,530
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	111,617	122,444
Gross unrealized gains	101	1,219
Gross unrealized losses	(3,515)	(155)
Fair value	108,203	123,508
Other Mortgage-Backed (Federal Agencies) [Member]
Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	89,514	62,581
Gross unrealized gains	163	1,328
Gross unrealized losses	(462)	(92)
Fair value	89,215	63,817
SBA Loan-Backed (Federal Agencies) [Member]
Note 3 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	40,455	65,828
Gross unrealized gains	291	182
Gross unrealized losses	(66)	(363)
Fair value	$ 40,680	$ 65,647