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Loan Servicing
3 Months Ended
Mar. 31, 2022
Payments for (Proceeds from) Mortgage Servicing Rights [Abstract]  
Loan Servicing Loan Servicing
Loans serviced for others are not included in the accompanying condensed consolidated balance sheets. The unpaid principal balances of loans serviced for others totaled approximately $1.6 billion and $1.5 billion at March 31, 2022 and December 31, 2021.

The aggregate fair value of capitalized mortgage servicing rights was approximately $18.6 million and $15.2 million at March 31, 2022 and December 31, 2021, compared to the carrying values of $18.6 million and $15.2 million at March 31, 2022 and December 31, 2021, respectively. Comparable market values and a valuation model that calculates the present value of future cash flows were used to estimate fair value. For purposes of measuring impairment, risk characteristics including product type, investor type and interest rates, were used to stratify the originated mortgage servicing rights.

Three Months Ended
March 31,March 31,
20222021
Mortgage servicing rights
Balance, beginning of period$17,780 $17,644 
Servicing rights capitalized1,562 1,130 
Amortization of servicing rights(750)(962)
Balance, end of period18,592 17,812 
Impairment allowance
Balance, beginning of period(2,594)(5,172)
Additions— — 
Reductions2,594 235 
Balance, end of period— (4,937)
Mortgage servicing rights, net$18,592 $12,875 
The Bank reduced impairment by approximately $2.6 million for the three months ended March 31, 2022 and $235,000 for the three months ended March 31, 2021.