Note 24 - Qualified Affordable Housing Partnership Investments - Generated Tax Credits and Benefits From Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Generated tax credits	$ 630	$ 655	$ 633
Tax benefits from taxable losses	180	196	190
Raymond James California Housing Opportunities Fund II [Member]
Generated tax credits	176	184	168
Tax benefits from taxable losses	48	53	62
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Generated tax credits	113	107	93
Tax benefits from taxable losses	26	36	27
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Generated tax credits	215	206	214
Tax benefits from taxable losses	56	60	58
California Affordable Housing Fund [Member]
Generated tax credits	126	158	158
Tax benefits from taxable losses	$ 50	$ 47	$ 43