Note 7 - Investment and Equity Securities - Sales of Available for Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018		Mar. 31, 2017
Proceeds from sales
Gross realized gains		[1]	488
Gross realized losses

[1] Prior to the acquisition of Liberty Bank, N.A., the Company had a previously held equity interest in Liberty which was re-measured at fair value on the acquisition date and resulted in a gain of $488,000, which was recorded in Equity Securities, Unrealized Gains on the consolidated Income Statement for the three months ended March 31, 2017.