Note 12 - Regulatory Matters (Details) - Actual Capital Levels and Minimum Levels - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Consolidated Entities [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets), actual amount	$ 340,557	$ 345,539
Total capital (to risk weighted assets), actual ratio	13.10%	13.50%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 207,722	$ 205,602
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
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations, ratio
Tier 1 capital (to risk weighted assets)
Tier 1 capital (to risk weighted assets), actual amount	$ 324,296	$ 329,858
Tier 1 capital (to risk weighted assets), actual ratio	12.50%	12.80%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 155,792	$ 154,201
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	6.00%	6.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations, ratio
Common equity tier 1 (to risk weighted assets)
Common equity tier 1 (to risk weighted assets), actual amount	$ 282,044	$ 280,171
Common equity tier 1 (to risk weighted assets), actual ratio	10.90%	10.90%
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 116,844	$ 115,804
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.50%	4.50%
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations, ratio
Tier 1 capital (to average assets)
Tier 1 capital (to average assets), actual amount	$ 324,296	$ 329,858
Tier 1 capital (to average assets), actual ratio	11.40%	11.60%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	$ 113,529	$ 114,138
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
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations, ratio
Bank [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets), actual amount	$ 340,668	$ 347,433
Total capital (to risk weighted assets), actual ratio	13.10%	13.50%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 207,495	$ 205,624
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	$ 259,369	$ 257,030
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	$ 324,406	$ 331,752
Tier 1 capital (to risk weighted assets), actual ratio	12.50%	12.90%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 155,622	$ 154,218
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	6.00%	6.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	$ 207,495	$ 205,624
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations, ratio	8.00%	8.00%
Common equity tier 1 (to risk weighted assets)
Common equity tier 1 (to risk weighted assets), actual amount	$ 324,406	$ 331,752
Common equity tier 1 (to risk weighted assets), actual ratio	12.50%	12.90%
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes amount	$ 116,716	$ 115,664
Common equity tier 1 (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.50%	4.50%
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	$ 168,590	$ 167,070
Common equity tier 1 (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations, ratio	6.50%	6.50%
Tier 1 capital (to average assets)
Tier 1 capital (to average assets), actual amount	$ 324,406	$ 331,752
Tier 1 capital (to average assets), actual ratio	11.40%	11.60%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	$ 113,448	$ 114,280
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	$ 141,810	$ 142,850
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations, ratio	5.00%	5.00%