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Value of Business Acquired (Tables)
 12 Months Ended
Dec. 31, 2020
Present Value of Future Insurance Profits [Abstract]  
Schedule of Value of Business Acquired
The balances of and changes in VOBA as of and for the years ended December 31, are as follows:
202020192018
 (in thousands)
Balance, beginning of year$30,025 $33,222 $35,109 
Amortization-Impact of assumption and experience unlocking and true-ups 2,006 2,093 1,485 
Amortization-All other(5,754)(6,376)(7,348)
Interest 1,551 1,778 1,983 
Change due to unrealized investment gains and losses(581)(692)1,993 
Balance, end of year$27,247 $30,025 $33,222 
Estimated Future VOBA Amortization, Net of Interest
The following table provides estimated future amortization, net of interest, for the periods indicated:
20212022202320242025
 (in thousands)
Estimated future VOBA amortization$4,604$3,898$3,295$2,771$2,323