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Servicing Rights (Tables)
 12 Months Ended
Dec. 31, 2023
Transfers and Servicing [Abstract]  
Schedule of Servicing Asset at Fair Value The following table details the activity in the Company's MSR for the year indicated:
(In Thousands)202320222021
Balance, beginning of period$18,635 $13,724 $11,218 
Additions for new MSR capitalized3,616 4,623 6,088 
Changes in fair value:
  Due to changes in model inputs of assumptions (1)
(922)1,615 (1,181)
  Other (2)
(1,765)(1,327)(2,401)
Carrying value, December 31$19,564 $18,635 $13,724 

(1) Principally reflects changes in discount rates and prepayment speed assumptions, which are primarily affected by changes in interest rates.
(2) Represents changes due to collection/realization of expected cash flows over time.

    The following table details information related to our serviced mortgage loan portfolio as of the dates indicated:
(In Thousands)December 31, 2023December 31, 2022
Balance of mortgage loans serviced for others$1,044,516 $898,840 
Weighted average rate of note4.03 %3.47 %
MSR as a percentage of serviced loans1.87 %2.07 %
Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets The following table outlines the weighted average key assumptions used in measuring the fair value of MSRs and the sensitivity of the current fair value of MSRs to immediate adverse changes in those assumptions as of the dates indicated. See Note 24 for additional information on key assumptions for MSRs.
(In Thousands)
December 31, 2023December 31, 2022
Fair value of MSRs
$19,564 $18,635 
Expected weighted-average life (in years)
10.239.46
Key assumptions:
   Constant prepayment rate1
8.48 %6.64 %
      Impact on fair value from 10% adverse change
($1,754)($518)
      Impact on fair value from 25% adverse change
($2,552)($1,233)
   Discount rate
10.98 %11.25 %
      Impact on fair value from 100 basis point increase
($811)($635)
      Impact on fair value from 200 basis point increase
($1,560)($1,224)
   Cost to service assumptions ($ per loan)
$82 $91 
      Impact on fair value from 10% adverse change
($160)($153)
      Impact on fair value from 25% adverse change
($401)($382)
1Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior.