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Loan Servicing Rights (Tables)
 6 Months Ended
Jun. 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
June 30,		Six Months Ended
June 30,
(dollars in thousands)2022202120222021
Balance at beginning of period$38,246 $28,262 $30,085 $28,124 
Additions (1)
1,347 3,058 11,013 6,171 
Amortization(1,472)(2,434)(2,977)(5,409)
Balance before valuation allowance at end of period38,121 28,886 38,121 28,886 
Valuation allowance:
Balance at beginning of period(1)(146)(46)(1,407)
(Additions)/recoveries1 41 46 1,302 
Balance at end of period— (105)— (105)
Loan servicing rights, net$38,121 $28,781 $38,121 $28,781 
(1)Additions in the six months ended June 30, 2022 include loan servicing rights of $7.7 million acquired in the First Midwest merger on February 15, 2022.