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Deferred Acquisition Costs and Value of Business Acquired
 12 Months Ended
Dec. 31, 2016
Business Combinations [Abstract]  
Deferred Acquisition Costs and Value of Business Acquired
Deferred Acquisition Costs and Value of Business Acquired
 
The following table summarizes activity in DAC and VOBA: 
 
 
DAC
 
VOBA
 
Total
Balances, January 1, 2014
 
$
314,071

 
$
29,217

 
$
343,288

Capitalized additions
 
110,315

 
—

 
110,315

Amortization and writedowns
 
(41,045
)
 
(3,801
)
 
(44,846
)
Unrealized investment (gains) losses
 
(29,933
)
 
(130
)
 
(30,063
)
Balances, December 31, 2014
 
353,408

 
25,286

 
378,694

Capitalized additions
 
63,093

 
—

 
63,093

Amortization and writedowns
 
(96,095
)
 
(4,493
)
 
(100,588
)
Unrealized investment (gains) losses
 
73,012

 
(68
)
 
72,944

Balances, December 31, 2015
 
393,418

 
20,725

 
414,143

Capitalized additions
 
93,222

 
—

 
93,222

Amortization and writedowns
 
(29,317
)
 
(1,992
)
 
(31,309
)
Unrealized investment (gains) losses
 
10,522

 
112

 
10,634

Balances, December 31, 2016
 
$
467,845

 
$
18,845

 
$
486,690

 
 The estimated future amortization of VOBA for the years ended December 31, 2017, through December 31, 2021, is approximately $3,200 per annum.