Note 14 - Other Operating Income and Expense - Components of Other Operating Income and Expense (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other operating income:
Bank owned life insurance		$ 1,365	$ 955	$ 1,971
Other(1)	[1]	2,137	2,254	2,158
Total other operating income		3,502	3,209	4,129
Other operating expense:
Service fees		3,348	3,641	3,401
Professional fees		2,567	1,501	1,272
Interchange		2,210	2,024	2,407
Advertising and public relations		2,206	1,532	1,309
Telephone and data communications		1,554	1,598	1,595
OREO expense and net loss		1,202	1,420	2,438
Office supplies		1,171	1,220	1,228
Other(1)	[1]	6,841	7,011	7,461
Total other operating expense		$ 21,099	$ 19,947	$ 21,111

[1] Other components of other operating income or expense that do not exceed 1% of total income.