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Mortgage Servicing Rights
 12 Months Ended
Dec. 31, 2024
Transfers and Servicing [Abstract]  
Mortgage Servicing Rights MORTGAGE SERVICING RIGHTS
Information with respect to the Company’s mortgage servicing rights follows:
Year Ended December 31,202420232022
Balance at beginning of year$28.3 $31.1 $31.6 
Acquisition of mortgage servicing rights— — 1.3 
Originations of mortgage servicing rights0.7 1.1 2.5 
Amortization expense(3.3)(3.9)(4.3)
Balance at end of year25.7 28.3 31.1 
Principal balance of serviced loans underlying mortgage servicing rights
$2,853.2 $3,091.1 $3,259.8 
Mortgage servicing rights as a percentage of serviced loans0.90 %0.92 %0.95 %
At December 31, 2024, the estimated fair value and weighted average remaining life of the Company’s mortgage servicing rights were $35.4 million and 7.6 years, respectively. The fair value of mortgage servicing rights was determined using discount rates ranging from 11.1% to 12.4% and monthly prepayment speeds ranging from 0.2% to 2.2% depending upon the risk characteristics of the underlying loans. At December 31, 2023, the estimated fair value and weighted average remaining life of the Company’s mortgage servicing rights were $38.8 million and 7.8 years, respectively. The fair value of mortgage servicing rights was determined using discount rates ranging from 11.9% to 12.8% and monthly prepayment speeds ranging from 0.4% to 1.6% depending upon the risk characteristics of the underlying loans. There were no temporary impairments or impairment reversals in 2024 and 2023, compared to $3.4 million of impairments reversed in 2022. There was no valuation reserve and no permanent impairment was recorded in 2024, 2023, or 2022.