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Value of Business Acquired
 12 Months Ended
Dec. 31, 2018
Present Value of Future Insurance Profits [Abstract]  
Value of Business Acquired
VALUE OF BUSINESS ACQUIRED
The balances of and changes in VOBA as of and for the years ended December 31, are as follows:
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
(in thousands)
Balance, beginning of year
$
35,109

 
$
30,287

 
$
33,640

Amortization-Impact of assumption and experience unlocking and true-ups (1)
1,485

 
10,035

 
2,372

Amortization-All other (1)
(7,348
)
 
(7,422
)
 
(8,176
)
Interest (2)
1,983

 
2,001

 
1,939

Change in unrealized investment gains and losses
1,993

 
208

 
512

Balance, end of year
$
33,222

 
$
35,109

 
$
30,287


(1)
The weighted average remaining expected life of VOBA was approximately 5.62 years as of December 31, 2018.
(2)
The interest accrual rate for the VOBA related to the businesses acquired was 5.96%, 5.96% and 6.00% for the years ended December 31, 2018, 2017 and 2016.
The following table provides estimated future amortization, net of interest, for the periods indicated:
 
2019
 
2020
 
2021
 
2022
 
2023
 
 
 
 
 
 
 
 
 
 
 
(in thousands)
Estimated future VOBA amortization
$
4,531

 
$
4,039

 
$
3,626

 
$
3,247

 
$
2,909