Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position [Line Items]
Less than 12 months, number of securities	12	39
Less than 12 months, fair value	$ 24,358	$ 142,157
Less than 12 months, gross unrealized losses	400	3,781
12 months or longer, number of securities	29	13
12 months or longer, fair value	98,569	35,946
12 months or longer, gross unrealized losses	2,013	1,560
Number of securities	41	52
Fair value	122,927	178,103
Gross unrealized losses	2,413	5,341
State and Municipal [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position [Line Items]
Less than 12 months, number of securities		1
Less than 12 months, fair value		1,010
Less than 12 months, gross unrealized losses		71
12 months or longer, number of securities	1	0
12 months or longer, fair value	1,050	0
12 months or longer, gross unrealized losses	27	0
Number of securities	1	1
Fair value	1,050	1,010
Gross unrealized losses	27	71
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position [Line Items]
Less than 12 months, number of securities	3	14
Less than 12 months, fair value	1,925	62,251
Less than 12 months, gross unrealized losses	71	2,863
12 months or longer, number of securities	12	9
12 months or longer, fair value	63,782	29,123
12 months or longer, gross unrealized losses	1,616	1,338
Number of securities	15	23
Fair value	65,707	91,374
Gross unrealized losses	1,687	4,201
Other Mortgage-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position [Line Items]
Less than 12 months, number of securities	6	20
Less than 12 months, fair value	11,049	64,428
Less than 12 months, gross unrealized losses	280	774
12 months or longer, number of securities	13	1
12 months or longer, fair value	28,673	1,517
12 months or longer, gross unrealized losses	300	153
Number of securities	19	21
Fair value	39,722	65,945
Gross unrealized losses	580	927
SBA Loan-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities in Continuous Unrealized Loss Position [Line Items]
Less than 12 months, number of securities	3	4
Less than 12 months, fair value	11,384	14,468
Less than 12 months, gross unrealized losses	49	73
12 months or longer, number of securities	3	3
12 months or longer, fair value	5,064	5,306
12 months or longer, gross unrealized losses	70	69
Number of securities	6	7
Fair value	16,448	19,774
Gross unrealized losses	$ 119	$ 142