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Loans (Narrative) (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accrued interest receivable on loans $ 14,600 $ 10,300
Loans pledged as collateral 2,300,000 2,200,000
Nonaccrual loans included in past due loans 7,100 9,400
Nonaccrual loans with no ACL 4,300 4,200
Residential loans in process of foreclosure 4,400 1,500
Nonaccrual loans current on payment 5,100 4,800
Individually analyzed loans 12,000 21,100
Total loans [1] 4,848,873 4,272,925
Collateral Dependent Individually Analyzed    
Total loans $ 8,292 $ 14,406
[1] Includes net unamortized loan origination costs of $10.7 million and $6.7 million, respectively, at September 30, 2022 and December 31, 2021 and net unamortized premiums on purchased loans of $329 thousand and $414 thousand, respectively, at September 30, 2022 and December 31, 2021.