Note 6 - Investments Available For Sale Securities, Proceeds and Gains (Losses) (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Proceeds received from redemptions			$ 103,595	$ 4,985	$ 538
Proceeds from sales of fixed-maturity investments available for sale	$ 3,621	$ 16,208	20,100	19,672	17,185
Proceeds received from sales			146,049	0	0
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds received from redemptions			103,595	4,985	538
Proceeds from sales of fixed-maturity investments available for sale			20,100	19,672	17,185
Gross investment gains from sales and redemptions			64	99	1,078
Gross investment losses from sales and redemptions			(1,240)	(1,698)	(141)
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Gross investment gains from sales and redemptions			69,150	0	349
Proceeds received from sales			$ 146,049	$ 0	$ 10,503