Note 8 - Investment Maturity Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Due in less than 1 year	$ 140,914	$ 110,898
Due in 1 - 5 years	32,779	33,205
Due in greater than 5 years	5,353	5,361
Total	$ 179,046	$ 149,464