Note 6 - Loans and Allowance for Credit Losses (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 32,986	$ 38,302	$ 32,946
Recorded Investment With No Allowance	7,081	25,239	9,892
Recorded Investment With Allowance	23,332	13,063	22,754
Total Recorded Investment	30,413	38,302	32,646
Related Allowance	7,148	7,204	6,520
Commercial Loan [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	8,873	9,377	8,193
Average Recorded Investment- Year To Date	3	43	53
Commercial Loan [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	11,032	9,334	8,877
Average Recorded Investment- Year To Date	3	85	131
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	9,771	10,760	6,779
Recorded Investment With No Allowance	348	4,230	2,327
Recorded Investment With Allowance	8,323	6,530	4,452
Total Recorded Investment	8,671	10,760	6,779
Related Allowance	3,501	3,416	1,323
Commercial Real Estate Investment [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	5,841	5,405	6,183
Average Recorded Investment- Year To Date	43	38	38
Commercial Real Estate Investment [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	5,861	5,470	5,755
Average Recorded Investment- Year To Date	78	75	175
Commercial Real Estate Investment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	6,416	5,403	5,902
Recorded Investment With No Allowance	1,512	3,819	1,322
Recorded Investment With Allowance	4,529	1,584	4,580
Total Recorded Investment	6,041	5,403	5,902
Related Allowance	732	1,040	1,098
Commercial Real Estate Owner Occupied [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	5,277	6,444	5,939
Average Recorded Investment- Year To Date		43	52
Commercial Real Estate Owner Occupied [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	5,335	6,515	6,285
Average Recorded Investment- Year To Date		99	108
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	3,230	6,438	5,452
Recorded Investment With No Allowance	99	5,533	111
Recorded Investment With Allowance	3,131	905	5,341
Total Recorded Investment	3,230	6,438	5,452
Related Allowance	1,102	1,025	1,853
Residential Mortgage [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	711	741	891
Average Recorded Investment- Year To Date			2
Residential Mortgage [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	769	727	792
Average Recorded Investment- Year To Date			2
Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	650	790	887
Recorded Investment With No Allowance	650	790	774
Recorded Investment With Allowance			113
Total Recorded Investment	650	790	887
Related Allowance			27
Home Equity Line of Credit [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	501	446	567
Average Recorded Investment- Year To Date			2
Home Equity Line of Credit [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	541	468	508
Average Recorded Investment- Year To Date			4
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	403	411	623
Recorded Investment With No Allowance	125	38
Recorded Investment With Allowance	278	373	623
Total Recorded Investment	403	411	623
Related Allowance	208	317	526
Consumer, Other [Member] | Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	30	6	58
Average Recorded Investment- Year To Date			1
Consumer, Other [Member] | Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	43	18	34
Average Recorded Investment- Year To Date			2
Consumer, Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		11	70
Recorded Investment With No Allowance		1
Recorded Investment With Allowance		10	70
Total Recorded Investment		11	70
Related Allowance		10	68
Quarter to Date [Member] | Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	11,822	18,224	13,405
Average Recorded Investment- Year To Date	49	42	44
Quarter to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	33,055	40,643	35,236
Average Recorded Investment- Year To Date	95	166	192
Year to Date [Member] | Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	12,192	19,894	17,298
Average Recorded Investment- Year To Date	552	84	169
Year to Date [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment- Quarter To Date	35,773	42,426	39,549
Average Recorded Investment- Year To Date	633	343	591
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	12,516	14,489	13,233
Recorded Investment With No Allowance	4,347	10,828	5,358
Recorded Investment With Allowance	7,071	3,661	7,575
Total Recorded Investment	11,418	14,489	12,933
Related Allowance	$ 1,605	$ 1,396	$ 1,625