Note 24 - Qualified Affordable Housing Partnership Investments - Original Investment in LIHTC Projects (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Original Investment	$ 7,954	$ 7,954
Current Recorded Investment	3,529	4,217
Unfunded Liability Obligation	361	485
Tax Credits and Benefits	810	851
Amortization of Investments	688	598	$ 712
Net Income Tax Benefit	122	253
Raymond James California Housing Opportunities Fund II [Member]
Original Investment	2,000	2,000
Current Recorded Investment	1,182	1,361
Unfunded Liability Obligation	20	45
Tax Credits and Benefits	224	237
Amortization of Investments	179	192
Net Income Tax Benefit	45	45
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Original Investment	1,000	1,000
Current Recorded Investment	589	698
Unfunded Liability Obligation		73
Tax Credits and Benefits	139	143
Amortization of Investments	108	100
Net Income Tax Benefit	31	43
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Original Investment	2,500	2,500
Current Recorded Investment	1,476	1,713
Unfunded Liability Obligation	341	367
Tax Credits and Benefits	271	266
Amortization of Investments	237	106
Net Income Tax Benefit	34	160
California Affordable Housing Fund [Member]
Original Investment	2,454	2,454
Current Recorded Investment	282	445
Unfunded Liability Obligation
Tax Credits and Benefits	176	205
Amortization of Investments	164	200
Net Income Tax Benefit	$ 12	$ 5