Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	$ 231,706	$ 262,100
Gross unrealized gains	540	3,012
Gross unrealized losses	(5,167)	(610)
Fair value	227,079	264,502
State and Municipal [Member]
Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	8,017	11,247
Gross unrealized gains	174	283
Gross unrealized losses	(56)	0
Fair value	8,135	11,530
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	103,937	122,444
Gross unrealized gains	100	1,219
Gross unrealized losses	(3,999)	(155)
Fair value	100,038	123,508
Other Mortgage-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	80,747	62,581
Gross unrealized gains	69	1,328
Gross unrealized losses	(1,008)	(92)
Fair value	79,808	63,817
SBA Loan-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Reconciliation of Available for Sale Securities [Line Items]
Amortized cost	39,005	65,828
Gross unrealized gains	197	182
Gross unrealized losses	(104)	(363)
Fair value	$ 39,098	$ 65,647