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Revenue Recognition (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]      
Non-interest Income (out-of-scope of Topic 606) $ 17,323 $ 9,042 $ 6,018
Total Non-interest Income 54,474 45,501 37,070
Trust and Investment Product Fees      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 8,005 7,278 6,680
Service Charges on Deposit Accounts      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 7,334 8,718 7,044
Insurance Revenues      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 8,922 8,940 8,330
Interchange Fee Income      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 10,529 9,450 7,278
In-Scope of Topic 606:      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 37,151 36,459 31,052
In-Scope of Topic 606: | Trust and Investment Product Fees      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 8,005 7,278 6,680
In-Scope of Topic 606: | Transferred at Point in Time | Service Charges on Deposit Accounts      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 7,334 8,718 7,044
In-Scope of Topic 606: | Transferred at Point in Time | Interchange Fee Income      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 10,529 9,450 7,278
In-Scope of Topic 606: | Transferred at Point in Time | Other Operating Income      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) 2,361 2,073 1,720
In-Scope of Topic 606: | Transferred over Time | Insurance Revenues      
Disaggregation of Revenue [Line Items]      
Non-interest Income (in-scope of Topic 606) $ 8,922 $ 8,940 $ 8,330