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Goodwill and Other Intangible Assets
 9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
The Corporation has core deposit and customer-related intangibles and servicing rights, which are not deemed to have an indefinite life and therefore will continue to be amortized over their useful life using the present value of projected cash flows. The Corporation also has goodwill which is deemed to be an indefinite intangible asset and is not amortized.

Changes in the carrying amount of the Corporation's goodwill by business segment for the nine months ended September 30, 2020 were as follows:
(Dollars in thousands)BankingWealth ManagementInsuranceConsolidated
Balance at December 31, 2019$138,476 $15,434 $18,649 $172,559 
Addition to goodwill from acquisitions— — — — 
Balance at September 30, 2020$138,476 $15,434 $18,649 $172,559 
The following table reflects the components of intangible assets at the dates indicated:
At September 30, 2020At December 31, 2019
(Dollars in thousands)Gross Carrying Amount
Accumulated Amortization (1)
Net Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Amortized intangible assets:
Core deposit intangibles$6,788 $4,610 $2,178 $6,788 $4,026 $2,762 
Customer related intangibles7,604 7,046 558 8,819 7,923 896 
Servicing rights (1)21,421 15,142 6,279 19,160 12,534 6,626 
Total amortized intangible assets$35,813 $26,798 $9,015 $34,767 $24,483 $10,284 
(1) Included within accumulated amortization is a valuation allowance of $206 thousand on mortgage servicing rights at September 30, 2020. There was no valuation allowance as of December 31, 2019.
The estimated aggregate amortization expense for core deposit and customer-related intangibles for the remainder of 2020 and the succeeding fiscal years is as follows:
Year(Dollars in thousands)Amount
Remainder of 2020$278 
2021923 
2022666 
2023409 
2024267 
Thereafter193 
Total$2,736 
The aggregate fair value of mortgage servicing rights was $6.3 million and $9.2 million at September 30, 2020 and December 31, 2019, respectively. The fair value of mortgage servicing rights was determined using a discount rate of 10.0% at September 30, 2020 and December 31, 2019.
Changes in the servicing rights balance are summarized as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in thousands)2020201920202019
Beginning of period$6,081 $6,599 $6,626 $6,768 
Servicing rights capitalized900 464 2,261 1,051 
Amortization of servicing rights(834)(585)(2,402)(1,320)
Changes in valuation allowance132 18 (206)(3)
End of period$6,279 $6,496 $6,279 $6,496 
Loans serviced for others$1,167,316 $1,055,823 $1,167,316 $1,055,823 
Activity in the valuation allowance for mortgage servicing rights was as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in thousands)2020201920202019
Valuation allowance, beginning of period$(338)$(21)$— $— 
Additions— — (206)(3)
Reductions132 18 — — 
Valuation allowance, end of period$(206)$(3)$(206)$(3)
The estimated amortization expense of servicing rights for the remainder of 2020 and the succeeding fiscal years is as follows:
Year(Dollars in thousands)Amount
Remainder of 2020$1,724 
20211,276 
2022941 
2023693 
2024302 
Thereafter1,343 
Total$6,279