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Mortgage Servicing Rights (Tables)
3 Months Ended
Mar. 31, 2022
Transfers and Servicing [Abstract]  
Summary of Changes in Mortgage Servicing Rights
The following table summarizes the changes in MSRs, which are included in other assets on the consolidated balance sheets, with adjustments to the carrying value included in mortgage banking income on the consolidated statements of income:
Three months ended March 31
 20222021
 (in thousands)
Amortized cost:
Balance at beginning of period$35,993 $38,745 
Originations of MSRs1,355 2,811 
Amortization(1,724)(3,753)
Balance at end of period$35,624 $37,803 
Valuation allowance:
Balance at beginning of period$(600)$(10,500)
Reduction (addition) to valuation allowance600 6,100 
Balance at end of period$ $(4,400)
Net MSRs at end of period$35,624 $33,403 
Estimated fair value of MSRs at end of period$47,609 $33,403