Note 13 - Regulatory Matters (Details) - Actual Capital Levels and Minimum Levels (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Consolidated Entities [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets), actual amount	$ 347,997	$ 334,793
Total capital (to risk weighted assets), actual ratio	14.10%	14.40%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	197,872	185,553
Total capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	8.00%	8.00%
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount
Tier 1 capital (to risk weighted assets)
Tier 1 capital (to risk weighted assets), actual amount	326,947	314,752
Tier 1 capital (to risk weighted assets), actual ratio	13.20%	13.60%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	148,404	92,777
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	6.00%	4.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount
Common equity tier 1 (to risk weighted assets)
Common equity tier 1 (to risk weighted assets), actual amount	276,416
Common equity tier 1 (to risk weighted assets), actual ratio	11.20%
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes amount	111,395
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.50%
Tier 1 capital (to average assets)
Tier 1 capital (to average assets), actual amount	326,947	314,752
Tier 1 capital (to average assets), actual ratio	11.60%	11.20%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	112,656	112,949
Tier 1 capital (to risk average assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Bank [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets), actual amount	347,674	332,749
Total capital (to risk weighted assets), actual ratio	14.10%	14.40%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	197,988	185,309
Total capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	8.00%	8.00%
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	247,485	231,636
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets)
Tier 1 capital (to risk weighted assets), actual amount	326,624	312,708
Tier 1 capital (to risk weighted assets), actual ratio	13.20%	13.50%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	148,491	92,655
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	6.00%	4.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	197,988	138,982
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	8.00%	6.00%
Common equity tier 1 (to risk weighted assets)
Common equity tier 1 (to risk weighted assets), actual amount	326,624
Common equity tier 1 (to risk weighted assets), actual ratio	13.20%
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes amount	111,369
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.50%
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	160,865
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	6.50%
Tier 1 capital (to average assets)
Tier 1 capital (to average assets), actual amount	326,624	312,708
Tier 1 capital (to average assets), actual ratio	11.60%	11.10%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	112,725	112,856
Tier 1 capital (to risk average assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations amount	$ 140,906	$ 141,070
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations ratio	5.00%	5.00%