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Note 5 - Investments Net Gains (Losses) on Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) on investments $ 1,721 $ (1,088) $ 34 $ (4,530)
Unrealized Gain (Loss) on Securities 9,117 (5,733) 28,586 (18,537)
Total net gains (losses) on investments 10,838 (6,821) 28,620 (23,911)
Fixed maturities        
Gain (Loss) on Securities [Line Items]        
Fixed maturities available for sale, net realized gain (loss) [1] 1,303 (1,691) 808 (4,811)
Gross investment gains from sales and redemptions 2,064 419 6,229 1,017
Gross investment losses from sales and redemptions (761) (2,110) (5,421) (5,828)
Trading Securities        
Gain (Loss) on Securities [Line Items]        
Trading securities, net realized gain (loss) 274 (112) (410) (650)
Equity securities        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) 0 498 (680) 640
Short-term Investments        
Gain (Loss) on Securities [Line Items]        
Debt and Equity Securities, Gain (Loss) 144 217 316 291
OTTI Recognized in Earnings        
Gain (Loss) on Securities [Line Items]        
Other-than-temporary impairment losses $ 0 $ 0 $ 0 $ (844)
[1] Components of net realized gains (losses) on fixed-maturities available for sale include:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
(In thousands)
2019
 
2018
 
2019
 
2018
Gross investment gains from sales and redemptions
$
2,064

 
$
419

 
$
6,229

 
$
1,017

Gross investment losses from sales and redemptions
(761
)
 
(2,110
)
 
(5,421
)
 
(5,828
)