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Note 15 - Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The following table shows the rollforward of accumulated other comprehensive income (loss) as of the periods indicated:
 
Three Months Ended March 31, 2018
(In thousands)
Before Tax
 
Tax Effect
 
Net of Tax
Balance at beginning of period
$
32,669

 
$
9,584

 
$
23,085

OCI:
 
 
 
 
 
Unrealized gains (losses) on investments:
 
 
 
 
 
Unrealized holding gains (losses) arising during the period
(76,763
)
 
(16,120
)
 
(60,643
)
Less: Reclassification adjustment for net gains (losses) included in net income (1) 
(3,964
)
 
(832
)
 
(3,132
)
Net unrealized gains (losses) on investments
(72,799
)
 
(15,288
)
 
(57,511
)
Unrealized foreign currency translation adjustments
4

 
1

 
3

Cumulative effect of adopting the accounting standard update for financial instruments
284

 
60

 
224

Cumulative effect of adopting the accounting standard update for the reclassification of certain tax effects
—

 
(2,724
)
 
2,724

OCI
(72,511
)
 
(17,951
)
 
(54,560
)
Balance at end of period
$
(39,842
)
 
$
(8,367
)
 
$
(31,475
)
 
 
 
 
 
 
 
Three Months Ended March 31, 2017
(In thousands)
Before Tax
 
Tax Effect
 
Net of Tax
Balance at beginning of period
$
(19,063
)
 
$
(6,668
)
 
$
(12,395
)
OCI:
 
 
 
 
 
Unrealized gains (losses) on investments:
 
 
 
 
 
Unrealized holding gains (losses) arising during the period
11,334

 
3,967

 
7,367

Less: Reclassification adjustment for net gains (losses) included in net income (1) 
(2,509
)
 
(878
)
 
(1,631
)
Net unrealized gains (losses) on investments
13,843

 
4,845

 
8,998

Unrealized foreign currency translation adjustments
52

 
18

 
34

OCI
13,895

 
4,863

 
9,032

Balance at end of period
$
(5,168
)
 
$
(1,805
)
 
$
(3,363
)

______________________
(1)
Included in net gains (losses) on investments and other financial instruments on our consolidated statements of operations.