Note 24 - Income Taxes - Reconciliation of Income Taxes (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax at the federal statutory rate	34.00%	34.00%	34.00%
Deferred tax asset write-off	5.02%
State franchise tax, net of federal tax benefit	6.11%	5.79%	4.89%
Amortization of affordable housing credit partnerships	8.11%	5.91%	11.04%
Officer life insurance	(2.89%)	(1.81%)	(3.34%)
Affordable housing credits and benefits	(11.69%)	(6.42%)	(11.67%)
Tax-exempt interest	(10.85%)	(8.02%)	(13.46%)
Other	(0.68%)	(0.71%)	0.16%
Effective Tax Rate	27.13%	28.74%	21.62%