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Mortgage Servicing Rights (Tables)
 12 Months Ended
Dec. 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 fair value included in mortgage banking income on the consolidated statements of income:
202220212020
 (dollars in thousands)
Amortized cost:
Balance at beginning of period$35,993 $38,745 $39,267 
Originations of MSRs4,067 9,216 12,173 
Amortization(5,843)(11,968)(12,695)
Balance at end of period$34,217 $35,993 $38,745 
Valuation allowance:
Balance at beginning of period$(600)$(10,500)$— 
Reduction (addition) to valuation allowance600 9,900 (10,500)
Balance at end of period$— $(600)$(10,500)
Net MSRs at end of period$34,217 $35,393 $28,245 
Estimated fair value of MSRs at end of period$50,044 $35,393 $28,245 
Schedule Of MSR Amortization Expense Estimated future MSR amortization expense, based on balances as of December 31, 2022, and the estimated remaining lives of the underlying loans, follows (dollars in thousands):
Year 
2023$4,391 
20243,915 
20253,474 
20263,074 
20272,713 
Thereafter16,650 
Total estimated amortization expense$34,217