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Loan Servicing Rights (Tables)
 9 Months Ended
Sep. 30, 2022
Transfers and Servicing [Abstract]  
Schedule of Components of Loan Servicing Rights and Valuation Allowance
The following table summarizes the carrying values and activity related to loan servicing rights and the related valuation allowance: 
Three Months Ended
September 30,		Nine Months Ended
September 30,
(dollars in thousands)2022202120222021
Balance at beginning of period$38,121 $28,886 $30,085 $28,124 
Additions (1)
1,280 2,671 12,293 8,842 
Amortization(1,569)(2,236)(4,546)(7,645)
Balance before valuation allowance at end of period37,832 29,321 37,832 29,321 
Valuation allowance:
Balance at beginning of period— (105)(46)(1,407)
(Additions)/recoveries— 5 46 1,307 
Balance at end of period— (100)— (100)
Loan servicing rights, net$37,832 $29,221 $37,832 $29,221 
(1)Additions in the nine months ended September 30, 2022 include loan servicing rights of $7.7 million acquired in the First Midwest merger on February 15, 2022.