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Other Comprehensive Income
 6 Months Ended
Jun. 30, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Other Comprehensive Income
Other Comprehensive Income
 
The following table summarizes the components of comprehensive income:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Unrealized gains arising during the period, before U.S. income taxes
$
7,853

 
$
15,346

 
$
13,851

 
$
32,464

U.S. income taxes
(1,156
)
 
(2,147
)
 
(2,792
)
 
(3,077
)
Unrealized gains arising during the period, net of  U.S. income taxes
6,697

 
13,199

 
11,059

 
29,387

Less reclassification adjustment:
 

 
 

 
 
 
 

Net realized investment gains
(12
)
 
567

 
438

 
1,408

U.S. income tax expenses
1

 
(160
)
 
(121
)
 
(433
)
Reclassification adjustment for investment gains realized in net income
(11
)
 
407

 
317

 
975

Other comprehensive income
$
6,708

 
$
12,792

 
$
10,742

 
$
28,412