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Other Comprehensive (Loss) Income
 6 Months Ended
Jun. 30, 2018
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Other Comprehensive (Loss) Income
Other Comprehensive (Loss) Income
The following table summarizes the components of other comprehensive (loss) income:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
(in thousands)
Unrealized (losses) gains arising during the period, before U.S. income taxes
$
(6,633
)
 
$
7,853

 
$
(25,925
)
 
$
13,851

U.S. income taxes
155

 
(1,156
)
 
699

 
(2,792
)
Unrealized (losses) gains arising during the period, net of U.S. income taxes
(6,478
)
 
6,697

 
(25,226
)
 
11,059

Less reclassification adjustment:
 

 
 

 
 
 
 

Net realized investment losses (gains)
108

 
(12
)
 
(93
)
 
438

U.S. income tax expenses
(28
)
 
1

 
(28
)
 
(121
)
Reclassification adjustment for investment losses (gains) realized in net income
80

 
(11
)
 
(121
)
 
317

Other comprehensive (loss) income
$
(6,558
)
 
$
6,708

 
$
(25,105
)
 
$
10,742