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Note 5 - Investments Net Gains (Losses) on Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) on investments $ 4,597 $ (4,447) $ 4,631 $ (8,977)
Unrealized Gain (Loss) on Securities 4,419 1,405 33,005 (17,132)
Total net gains (losses) on investments 9,016 (3,942) 37,636 (27,853)
Fixed maturities        
Gain (Loss) on Securities [Line Items]        
Fixed maturities available for sale, net realized gain (loss) [1] 4,401 (4,219) 5,209 (9,030)
Gross investment gains from sales and redemptions 4,697 814 10,926 1,831
Gross investment losses from sales and redemptions (296) (5,033) (5,717) (10,861)
Trading Securities        
Gain (Loss) on Securities [Line Items]        
Trading securities, net realized gain (loss) 19 (260) (391) (910)
Equity securities        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) (28) (69) (708) 571
Short-term Investments        
Gain (Loss) on Securities [Line Items]        
Debt and Equity Securities, Gain (Loss) 205 101 521 392
OTTI Recognized in Earnings        
Gain (Loss) on Securities [Line Items]        
Other-than-temporary impairment losses $ 0 $ (900) $ 0 $ (1,744)
[1] Components of net realized gains (losses) on fixed-maturities available for sale include:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
(In thousands)
2019
 
2018
 
2019
 
2018
Gross investment gains from sales and redemptions
$
4,697

 
$
814

 
$
10,926

 
$
1,831

Gross investment losses from sales and redemptions
(296
)
 
(5,033
)
 
(5,717
)
 
(10,861
)