Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 45,512	$ 43,480	$ 32,946
Recorded Investment With No Allowance	17,272	28,614	9,892
Recorded Investment With Allowance	26,992	14,366	22,754
Total Recorded Investment	44,264	42,980	32,646
Related Allowance	7,888	7,458	6,520
Average Recorded Investment	38,457	44,490	39,549
Interest Income Recognized	538	177	591
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	17,646	8,493	6,779
Recorded Investment With No Allowance	6,409	4,821	2,327
Recorded Investment With Allowance	11,237	3,172	4,452
Total Recorded Investment	17,646	7,993	6,779
Related Allowance	3,810	2,360	1,323
Average Recorded Investment	12,213	8,621	8,877
Interest Income Recognized		42	131
Commercial Real Estate Investment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	6,016	5,407	5,902
Recorded Investment With No Allowance	1,106	3,821	1,322
Recorded Investment With Allowance	4,535	1,586	4,580
Total Recorded Investment	5,641	5,407	5,902
Related Allowance	732	818	1,098
Average Recorded Investment	5,771	5,504	5,755
Interest Income Recognized	35	37	175
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	7,323	6,449	5,452
Recorded Investment With No Allowance	4,191	5,538	111
Recorded Investment With Allowance	3,132	911	5,341
Total Recorded Investment	7,323	6,449	5,452
Related Allowance	1,105	704	1,853
Average Recorded Investment	6,388	6,554	6,285
Interest Income Recognized		56	108
Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	771	691	887
Recorded Investment With No Allowance	658	691	774
Recorded Investment With Allowance	113		113
Total Recorded Investment	771	691	887
Related Allowance	30		27
Average Recorded Investment	829	695	792
Interest Income Recognized			2
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	598	481	623
Recorded Investment With No Allowance	125	132
Recorded Investment With Allowance	473	349	623
Total Recorded Investment	598	481	623
Related Allowance	378	218	526
Average Recorded Investment	611	497	508
Interest Income Recognized			4
Consumer, Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	60		70
Recorded Investment With Allowance	60		70
Total Recorded Investment	60		70
Related Allowance	58		68
Average Recorded Investment	65	22	34
Interest Income Recognized			2
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	13,098	21,959	13,233
Recorded Investment With No Allowance	4,783	13,611	5,358
Recorded Investment With Allowance	7,442	8,348	7,575
Total Recorded Investment	12,225	21,959	12,933
Related Allowance	1,775	3,358	1,625
Average Recorded Investment	12,580	22,597	17,298
Interest Income Recognized	$ 503	$ 42	$ 169