Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	$ 42,653	$ 51,605	$ 44,823	$ 52,569
Recognized Interest Income	290	483	677	1,029
Commercial [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	11,473	9,888	12,601	9,342
Recognized Interest Income	52	67	106	117
Commercial Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	27,166	30,228	27,836	31,416
Recognized Interest Income	205	349	505	727
Construction [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	2,397	7,552	2,254	7,981
Recognized Interest Income	25	59	51	159
Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	558	1,112	621	957
Consumer Installment And Other [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired loans, supplemental schedule [Line Items]
Average Recored Investment	1,059	2,825	1,511	2,873
Recognized Interest Income	$ 8	$ 8	$ 15	$ 26